600 ma 6 MHz Synchronous Step-down DC/DC Converter

Transcription

1 RP58x Series 6 ma 6 MHz Synchronous Step-down DC/DC Converter OUTLINE NO. EA The RP58x is a low supply current CMOS-based PWM/VFM step-down DC/DC converter with synchronous rectifier featuring 6 ma *1 output current. Internally, a single converter consists of an oscillator, a reference voltage unit, an error amplifier, a switching control circuit, a mode control circuit, a soft-start circuit, an under-voltage lockout (UVLO) circuit, an over current protection circuit, a thermal shutdown circuit and switching transistors. By the adoption of the synchronous rectification circuit with built-in switching transistors, the RP58x works as super efficient step-down DC/DC converter, without connecting external diodes. Using synchronous rectification not only increases circuit performance but also allows a design to reduce parts count. Power controlling method can be selected from forced PWM control type or PWM/VFM auto switching control type by inputting a signal to the MODE pin. In low output current, forced PWM control switches at fixed frequency rate in order to reduce noise. Likewise, in low output current, PWM/VFM auto switching control automatically switches from PWM mode to VFM mode in order to achieve high efficiency. Output voltage is internally fixed type which allows output voltages that range from.8 V to 3.3 V in.1 V step. The output voltage accuracy is as high as ±1.5% or ±18 mv. Protection circuits included in the RP58x are over current protection circuit and thermal shutdown circuit. Over current protection circuit supervises the inductor peak current in each switching cycle, and if the current exceeds the L X current limit (I LXLIM ), it turns off P-channel Tr. Thermal shutdown circuit detects overheating of the converter if the output pin is shorted to the ground pin (GND) etc. and stops the converter operation to protect it from damage if the junction temperature exceeds the specified temperature. The RP58x is offered in a small and thin 6-pin DFN(PLP)1212-6F package which achieves the smallest possible footprint solution on boards where area is limited. For an input capacitor (C IN ) and an output capacitor (C OUT ), the smaller sized 42/15 (inch/mm) capacitor can be used. For an inductor (L), the smaller sized 63/168 or 15/212 (inch/mm) inductor can be used. *1 This is an approximate value. The output current is dependent on conditions and external components. 1

2 RP58x NO. EA FEATURES Input Voltage Range (V IN ) 2.3 V to 5.5 V (Absolute Maximum Ratings: 6.5 V) Range (V OUT ).8 V to 3.3 V (Adjustable in.1 V steps) Supply Current (I DD2 ) Typ. 18 µa (VFM Mode with No-load) Standby Current (Istandby) Max. 5 µa Temperature Coefficient ( V OUT /Ta) Typ. ±1 ppm/ C Oscillator Frequency (fosc) Typ. 6. MHz Maximum Duty Cycle (Maxduty) 1% Built-in Driver ON Resistance (R ONP, R ONN ) Typ. Pch..33 Ω, Nch..24 Ω (V IN = 3.6 V) UVLO Detector Threshold (V UVLO1 ) Typ. 2. V Soft-start Time (tstart) Typ. 9 µs L X Current Limit Circuit (I LXLIM ) Typ. 1.1 A Accuracy ±1.5% (V OUT 1.2 V) or ±18 mv (V OUT < 1.2 V) Package DFN(PLP)1212-6F APPLICATIONS Cellular Phones Smartphones Digital Still Camera Notebook PCs, PDA s Li-ion Battery-used Equipment 2

3 RP58x NO. EA BLOCK DIAGRAM V IN UVLO Clock Generator Delay Control Thermal Protection Current Detector L X Soft Start Vref Delay Switching Control MODE Mode Control OSC CE Chip Enable V OUT + GND RIPPLE Control RP58xxx1A Block Diagram V IN UVLO Clock Generator Delay Control Thermal Protection Current Detector L X Soft Start Vref Delay Switching Control MODE Mode Control OSC CE Chip Enable V OUT + GND RIPPLE Control RP58xxx1B Block Diagram 3

4 RP58x NO. EA SELECTION GUIDE The set output voltage and the auto discharge *1 function are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free RP58Kxx1$-TR DFN(PLP)1212-6F 5, pcs Yes Yes xx: Specify the set output voltage (V SET ) within the range of.8 V (8) to 3.3 V (33) in.1 V *2 steps. If the set output voltage includes the 3rd digit, indicate the digit of.1. (1.5 V, 1.25 V, 1.35 V) Ex. If the set output voltage is 1.5 V: RP58K11$5 If the set output voltage is 1.25 V: RP58K121$5 If the set output voltage is 1.35 V: RP58K131$5 $: Specify the auto-discharge option. A: Fixed output voltage type B: Fixed output voltage type, auto-discharge function in shutdown mode *1 Auto-discharge function quickly lowers the output voltage to V, when the chip enable signal is switched from the active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor. *2.5 V step is also available as a custom code. PIN DESCRIPTION Top View Bottom View DFN(PLP)1212-6F Pin Configurations Pin Description Pin No. Symbol Pin Description 1 V OUT Output Pin 2 MODE Mode Control Pin ( H forced PWM control, L PWM/VFM auto switching control) 3 CE Chip Enable Pin ("H" active) 4 V IN Input Pin 5 L X L X Switching Pin 6 GND Ground Pin 4

5 ABSOLUTE MAXIMUM RATINGS RP58x NO. EA Absolute Maximum Ratings Symbol Item Rating Unit V IN V IN Input Voltage.3 to 6.5 V V LX L X Pin Voltage.3 to V IN +.3 V V CE CE Pin Input Voltage.3 to 6.5 V V MODE MODE Pin Input Voltage.3 to 6.5 V V OUT V OUT Pin Voltage.3 to 6.5 V I LX L X Pin 13 ma P D Power Dissipation (JEDEC STD 51-7 Test Land Pattern )* mw Ta Operating Temperature Range 4 to 85 C Tstg Storage Temperature Range 55 to 125 C *1 Refer to the section of PACKAGE INFORMATION for detailed information. ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings are not assured. RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS) All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. 5

6 ELECTRICAL CHARACTERISTICS Electrical Characteristics RP58x NO. EA (Ta = 25 C) Symbol Item Conditions Min. Typ. Max. Unit V IN Operating Input Voltage V V OUT V IN = V CE = 3.6 V V SET 1.2 V x.985 x1.15 V V SET < 1.2 V V ΔV OUT /ΔTa fosc Temperature Coefficient Oscillator Frequency I DD1 Supply Current 1 I DD2 Supply Current 2 4 C Ta 85 C ±1 ppm / C * MHz V IN = V CE = 5.5 V, V OUT = V SET µa V IN = V CE = V OUT V MODE = V µa = 5.5 V V MODE = 5.5 V 1 13 µa Istandby Standby Current V IN = 5.5 V, V CE = V 5 µa I CEH CE H Input Current V IN = V CE = 5.5 V 1 1 µa I CEL CE L Input Current V IN = 5.5 V, V CE = V 1 1 µa I MODEH Mode H Input Current V IN = V MODE = 5.5 V, V CE = V 1 1 µa I MODEL Mode L Input Current V IN = 5.5 V, V CE = V MODE = V 1 1 µa I VOUTH V OUT H Input Current *2 V IN = V OUT = 5.5 V, V CE = V 1 1 µa I VOUTL V OUT L Input Current V IN = 5.5 V, V CE = V OUT = V 1 1 µa R LOW On Resistance for Auto Discharge *3 V IN = 3.6 V, V CE = V 3 Ω I LXLEAKH L X Leakage Current H V IN = V LX = 5.5 V, V CE = V 1 5 µa I LXLEAKL L X Leakage Current L V IN = 5.5 V, V CE = V LX = V 5 1 µa V CEH CE H Input Voltage V IN = 5.5 V 1. V V CEL CE L Input Voltage V IN = 2.3 V.4 V V MODEH Mode H Input Voltage V IN = V CE = 5.5 V 1. V V MODEL Mode L Input Voltage V IN = V CE = 2.3 V.4 V R ONP On Resistance of Pch Tr. V IN = 3.6 V, I LX = 1 ma.33 Ω R ONN On Resistance of Nch Tr. V IN = 3.6 V, I LX = 1 ma.24 Ω Maxduty Maximum Duty Cycle 1 % tstart Soft-start Time * μs I LXLIM L X Current Limit 9 11 ma V UVLO1 UVLO Detector Threshold V IN = V CE V V UVLO2 UVLO Released Voltage V IN = V CE V T TSD T TSR Thermal Shutdown Temperature Thermal Shutdown Released Temperature Junction Temperature 14 C Junction Temperature 1 C All test items listed under ELECTRICAL CHARACTERISTICS are done under the pulse load condition (Tj Ta = 25 C) except Temperature Coefficient. *1 VIN = V CE = 3.6 V (V SET 2.6 V), V IN = V CE = V SET + 1 V (V SET > 2.6 V) *2 RP58xxx1A only *3 RP58xxx1B only *4 Soft-start Time is between the rising edge of CE pin and VOUT V SET x.9. 6

7 RP58x NO. EA TYPICAL APPLICATION GND VOUT Load COUT 4.7μF VIN L.47μH or 1.μH LX VIN RP58x MODE CE Control Control CIN 2.2μF or 4.7μF RP58x Typical Application Recommended Components Symbol Size Type Manufacturer C IN 2.2 µf Ceramic C15JBJ225K (TDK) 4.7 µf Ceramic C15JBJ475K (TDK) C OUT 4.7 µf Ceramic C15JBJ475K (TDK) L.47 µh (.5 µh) Inductor 1. µh Inductor MIPSZ212DR5 (FDK) MDT168CHR47N (TOKO) MIPSZ212D1R (FDK) MDT168CH1RN (TOKO) 7

8 RP58x NO. EA TECHNICAL NOTES Ensure the V IN and GND lines are sufficiently robust. A large switching current flows through the GND lines, the V DD line, the V OUT line, an inductor, and L X. If their impedance is too high, noise pickup or unstable operation may result. Set the external components as close as possible to the IC and minimize the wiring between the components and the IC, especially between a capacitor (C IN ) and the V IN pin. The wiring between V OUT and load and between L and V OUT should be separated. Choose a low ESR ceramic capacitor. The capacitance of C IN should be more than or equal to 2.2 µf. The capacitance of a capacitor (C OUT ) should be between 4.7 µf to 1 µf. The Inductance value should be set within the range of.47 µh to 1. µh. However, the inductance value is limited by output voltage. Refer to the table below. The phase compensation of this IC is designed according to the C OUT and L values. Choose an inductor that has small DC resistance, has enough allowable current and is hard to cause magnetic saturation. If the inductance value of an inductor is extremely small, the peak current of L X may increase. The increased L X peak current reaches L X limit current to trigger over current protection circuit even if the load current is less than 6 ma. Set Range vs. Inductance Range Set Input Voltage Inductance V SET V IN L =.47 μh L = 1. μh.8 to 1.2 up to 5.5 Recommended Acceptable 1.3 to 1.5 up to 4.5 Recommended Acceptable 4.5 to 5.5 Acceptable Recommended up to 3.6 Recommended Acceptable 1.6 to 2.6 up to 4.5 Acceptable Recommended 4.5 to Recommended 2.7 to 3.3 up to 4.5 Recommended Acceptable 4.5 to Recommended Over current protection circuit may be affected by self-heating or power dissipation environment. The performance of power source circuits using this IC largely depends on the peripheral circuits. When selecting the peripheral components, consider the conditions of use. Do not allow each component, PCB pattern and the IC to exceed their respected rated values (voltage, current and power) when designing the peripheral circuits. 8

9 RP58x NO. EA OPERATION OF STEP-DOWN DC/DC CONVERTER AND OUTPUTCURRENT The step-down DC/DC converter charges energy in the inductor when L X Tr. turns ON, and discharges the energy from the inductor when L X Tr. turns OFF and operates with less energy loss, so that a lower output voltage (V OUT ) than the input voltage (V IN ) can be obtained. The operation of the step-down DC/DC converter is explained in the following figures. i1 I L I LMAX V IN Pch Tr Nch Tr L i2 C L V OUT I LMIN i1 i2 topen Figure 1. Basic Circuit GND ton toff T = 1 / fosc Figure 2. Inductor Current (I L ) flowing through Inductor Step1. P-channel Tr. turns ON and the inductor current (I L = i1) flows, L is charged with energy. At this moment, i1 increases from the minimum inductor current (I LMIN ), which is A, and reaches the maximum inductor current (I LMAX ) in proportion to the on-time period (ton) of P-channel Tr. Step2. When P-channel Tr. turns OFF, L tries to maintain I L at I LMAX, so L turns N-channel Tr. ON and the inductor current (I L = i2) flows into L. Step3. i2 decreases gradually and reaches I LMIN after the open-time period (topen) of N-channel Tr., and then N-channel Tr. turns OFF. This is called discontinuous current mode. As the output current (I OUT ) increases, the off-time period (toff) of P-channel Tr. runs out before I L reaches I LMIN. The next cycle starts, and P-channel Tr. turns ON and N-channel Tr. turns OFF, which means I L starts increasing from I LMIN. This is called continuous current mode. In the case of PWM mode, V OUT is maintained by controlling ton. During the PWM mode, the oscillator frequency (fosc) is constantly maintained. As shown in Figure 2., when the step-down DC/DC operation is constant, I LMIN and I LMAX during ton of P-channel Tr. is same as the P-channel Tr. during toff. The current differential between I LMAX and I LMIN is described as ΔI. ΔI = I LMAX I LMIN = V OUT topen / L = (V IN V OUT ) ton / L Equation 1 However, T = 1 / fosc = ton + toff Duty (%) = ton / T 1 = ton fosc 1 topen toff In Equation 1, V OUT topen / L shows the amount of current change in OFF state. Also, (V IN V OUT ) ton / L shows the amount of current change at ON state. 9

10 RP58x NO. EA DISCONTINUOUS MODE AND CONTINUOUS MODE As illustrated in Figure 3., when IOUT is relatively small, topen < toff. In this case, the energy charged into L during ton will be completely discharged during toff, as a result, I LMIN =. This is called discontinuous mode. When IOUT is gradually increased, eventually topen = toff and when IOUT is increased further, eventually I LMIN >. This is called continuous mode. I L I L I LMAX I LMAX I LMIN topen I LMIN t I CONST t ton T = 1 / fosc toff ton T = 1 / fosc toff Figure 3. Discontinuous Mode Figure 4. Continuous Mode In the continuous mode, the solution of Equation 1 is described as tonc. tonc = T V OUT / V IN Equation 2 When ton < tonc, it indicates discontinuous mode, and when ton tonc, it indicates continuous mode. 1

11 RP58x NO. EA FORCED PWM MODE By setting the MODE pin to H, the RP58x switches on/off at the fixed frequency to reduce noise even under the light load. When I OUT is I L / 2 or less, I LMIN becomes less than. That is, the accumulated electricity in C L is discharged through the IC side at I L increase period from I LMIN to "" during ton and at I L decrease period from "" to I LMIN during toff. I L I LMAX ΔI L I OUT I LMIN t ton toff T = 1 / fosc VFM MODE Forced PWM Mode By setting the MODE pin to L, in low output current, the IC automatically switches into VFM mode in order to achieve high efficiency. In VFM mode, a value of ton is determined by V IN and V OUT. I L I LMAX I LMIN t ton toff VFM Mode 11

12 OUTPUT CURRENT AND SELECTION OF EXTERNAL COMPONENTS RP58x NO. EA The following equations explain the relationship between output current and peripheral components used in the diagrams in TYPICAL APPLICATIONS. Ripple Current P-P value is described as I RP, ON resistance of P-channel Tr. is described as R ONP, ON resistance of N-channel Tr. is described as R ONN, and DC resistor of the inductor is described as R L. First, when P-channel Tr. Is ON, the following equation is satisfied. V IN = V OUT + (R ONP + R L ) I OUT + L I RP / ton Equation 3 Second, when P-channel Tr. is OFF (N-channel Tr. Is ON ), the following equation is satisfied. L I RP / toff = R ONN I OUT + V OUT + R L I OUT Equation 4 Put Equation 4 into Equation 3 to solve ON duty of P-channel Tr. (D ON = ton / (toff + ton)): D ON = (V OUT + R ONN I OUT + R L I OUT ) / (V IN + R ONN I OUT R ONP I OUT ) Equation 5 Ripple Current is described as follows: I RP = (V IN V OUT R ONP I OUT R L I OUT ) D ON / fosc / L Equation 6 Peak current that flows through L, and L X Tr. is described as follows: I LXMAX = I OUT + I RP / 2 Equation 7 Consider I LXMAX when setting conditions of input and output, as well as selecting the external components. The above calculation formulas are based on the ideal operation of the I CS in continuous mode. 12

13 TIMING CHART RP58x NO. EA SOFT-START TIME Starting-up with CE Pin The IC starts to operate when the CE pin voltage (V CE ) exceeds the threshold voltage. The threshold voltage is preset between CE H input voltage (V CEH ) and CE L input voltage (V CEL ). After the start-up of the IC, soft-start circuit starts to operate. Then, after a certain period of time, the reference voltage (V REF ) in the IC gradually increases up to the specified value. CE Pin Input Voltage (V CE) IC Internal Reference Voltage (V REF) Lx Voltage (V LX) (V OUT) V CEH Threshold Level V CEL Soft-start Circuit operation starts. Soft-start Time IC operates with PWM mode during Soft-start time. Depending on Power Supply, Load Current, External Components Soft-start time starts when soft-start circuit is activated, and ends when the reference voltage reaches the specified voltage. Soft start time is not always equal to the turn-on speed of the step-down DC/DC converter. Note that the turn-on speed could be affected by the power supply capacity, the output current, the inductance value and the C OUT value. Starting-up with Power Supply After the power-on, when V IN exceeds the UVLO released voltage (V UVLO2 ), the IC starts to operate. Then, soft-start circuit starts to operate and after a certain period of time, V REF gradually increases up to the specified value. Soft-start time starts when soft-start circuit is activated, and ends when V REF reaches the specified voltage. V SET Input Voltage (V IN) V UVLO2 V UVLO1 Soft-start Time IC Internal Reference Voltage (V REF) Lx Voltage (V LX) IC operates with PWM mode during Soft-start time. V SET (V OUT) Depending on Power Supply, Load Current, External Components Note that the turn-on speed of V OUT could be affected by the power supply capacity, the output current, the inductance value, the C OUT value and the turn-on speed of V IN determined by C IN. 13

14 RP58x NO. EA Under Voltage Lockout (UVLO) Circuit If V IN becomes lower than V SET, the step-down DC/DC converter stops the switching operation and ON duty becomes 1%, and then V OUT gradually drops according to V IN. If the V IN becomes lower than the UVLO detector threshold (V UVLO1 ), the UVLO circuit starts to operate, V REF stops, and P-channel and N-channel built-in switch transistors turn OFF. As a result, V OUT drops according to the C OUT capacitance value and the load. To restart the operation, V IN needs to be higher than V UVLO2. The timing chart below shows the voltage shifts of V REF, V LX and V OUT when V IN value is varied. Input Voltage (V IN) IC Internal Reference Voltage V SET V UVLO2 V UVLO1 (V REF) Soft-start Time Lx Voltage (V LX) (V OUT) V SET Depending on Power Supply, Load Current, External Components Falling edge (operating) and rising edge (releasing) waveforms of V OUT could be affected by the initial voltage of C OUT and the output current of V OUT. 14

15 RP58x NO. EA Over Current Protection Circuit Over current protection circuit supervises the inductor peak current (the peak current flowing through P-channel Tr.) in each switching cycle. If the current exceeds the L X current limit (I LXLIM ) of 11 ma (Typ.), P-channel Tr. is turned off. I LXLIM could be easily affected by self-heating or ambient environment. If the V IN drops dramatically or becomes unstable due to short-circuit, protection operation could be affected. Over Current Protection L X Current L X Current Limit (I LXLIM ) Pch Tr. Current L X Voltage (V LX ) 15

16 RP58x NO. EA RP58x FEATURES FAST FREQUENCY AND FAST RESPONSE VIN VIN UVLO Thermal Protection Clock Generator Delay Control Current Detector LX 4.7uF MODE Control CE Control MODE CE Soft Start Chip Enable Vref Delay Mode Control Switching Control OSC VOUT.47uH or 1.uH VOUT GND + RIPPLE Control *1 4.7uF There are the following advantages when it operates at fast frequency (6 MHz). - Inductance value can be reduced. - The fluctuation of energy in one cycle is fast and small, as a result, the capacitance value of C OUT can be also reduced. - Small LC value reduced the feedback delay, then response frequency band can be wide and transient response is much improved compared with conventional line-up. *1 Ripple is added and easy to detect and stabilize the system. MAXIMUM FREQUENCY (6 MHz) LOCK VIN VIN UVLO Thermal Protection Clock Generator Delay Control *2 Current Detector LX 4.7uF MODE Control CE Control MODE CE Soft Start Chip Enable Vref Delay Mode Control Switching Control OSC VOUT.47uH or 1.uH VOUT GND + RIPPLE Control 4.7uF Switching frequency in order to become reference frequency (6 MHz), delay time is included the output voltage feedback loop and locked the frequency (6 MHz). *2 The frequency goes faster and faster without this. 16

17 RP58x NO. EA FREQUENCY CONTROL FOR MINIMUM ON/OFF TIME Minimum on/off time/minimum off time is set. (But 1% duty is available.) In the 6 MHz, based on the calculation of input/ output relation, on/off time can be calculated, and if it is not satisfy the minimum on time / minimum off time, the reference frequency must be reduced and switching frequency is reduced. (Ex.) Min On Time (4 ns) V IN = 3.6 V V OUT = 1. V 1/6 MHz 1. V / 3.6 V 46 ns > Min On Time (= 4 ns) 6 MHz Switching OK (Ex.) Min Off Time (4 ns) V IN = 5. V V OUT = 3.3 V 1/6 MHz ( V / 5. V ) 57 ns > Min Off Time (= 4 ns) 6 MHz Switching OK V IN =5.5V Vout=1.V 1/6 MHz 1. V / 5.5 V 3 ns < Min On Time (= 4 ns) It must be slow down from 6 MHz LX Waveform V IN =4.2 V V OUT = 3.3 V 1/6 MHz ( V / 4.2 V ) 36 ns < Min Off Time (= 4 ns) It must be slow down from 6 MHz LX Waveform 46 ns 57 ns 166 ns (= 1/6 MHz) Min On Time (= 4 ns) Min Off Time (= 4 ns) 166 ns (= 1/6 MHz) (166 +α) ns > 1/6 MHz (166 +α) ns > 1/6 MHz Cycle time becomes long in order to satisfy Min. on time. It is suitable with keeping the duty. Cycle time becomes long in order to satisfy Min. off time. It is suitable with keeping the duty. 17

18 RP58x NO. EA PACKAGE INFORMATION POWER DISSIPATION (DFN(PLP)1212-6F) Power Dissipation (P D ) of the package is dependent on PCB material, layout, and environmental conditions. The following conditions are used in this measurement. Measurement Conditions Environment Board Material Board Dimensions Copper Ratio Through-holes JEDEC STD 51-7 Test Land Pattern Mounting on Board (Wind Velocity = m/s) Glass Cloth Epoxy Plastic (4 Layers) 76.2 mm mm 1.6 mm Top side, Back side: 6 mm square, Approx.1% 2nd, 3rd: Approx. 1% φ.85 mm x 44 pcs Measurement Result Power Dissipation Thermal Resistance (Ta = 25 C, Tjmax = 125 C) JEDEC STD 51-7 Test Land Pattern 666 mw Θja = ( C) /.666 W = 15 C/W Θjc = 28 C/W Power Dissipation PD (mw) On Board Ambient Temperature ( C) Power Dissipation Measurement Board Pattern 基板レイアウト IC Mount Area (Unit : mm) IC 実装位置 ( 単位 : mm) 18

19 RP58x NO. EA PACKAGE DIMENSIONS (DFN(PLP)1212-6F) X4 A B.425± C INDEX.4Max..25± ±.5.5 M AB Bottom View (Unit: mm) S.5 S DFN (PLP) F Package Dimensions MARK SPECIFICATION (DFN(PLP)1212-6F) : Product Code Refer to MARK SPECIFICATION TABLE (DFN(PLP)1212-6F) : Lot Number Alphanumeric Serial Number DFN (PLP) F Mark Specification 19

20 RP58x NO. EA MARK SPECIFICATION TABLE (DFN(PLP)1212-6F) RP58Kxx1A RP58Kxx1B Product Name Product Name RP58K81A A A RP58K81B D A RP58K91A A C RP58K91B D C RP58K11A A E RP58K11B D E RP58K11A5 A F RP58K11B5 D F RP58K111A A G RP58K111B D G RP58K121A A J RP58K121B D J RP58K121A5 A K RP58K121B5 D K RP58K131A A L RP58K131B D L RP58K131A5 A M RP58K131B5 D M RP58K141A A N RP58K141B D N RP58K151A A R RP58K151B D R RP58K161A A T RP58K161B D T RP58K171A A V RP58K171B D V RP58K181A A X RP58K181B D X RP58K191A A Z RP58K191B D Z RP58K21A B B RP58K21B E B RP58K211A B D RP58K211B E D RP58K221A B F RP58K221B E F RP58K231A B H RP58K231B E H RP58K241A B K RP58K241B E K RP58K251A B M RP58K251B E M RP58K261A B P RP58K261B E P RP58K271A B S RP58K271B E S RP58K281A B U RP58K281B E U RP58K291A B W RP58K291B E W RP58K31A B Y RP58K31B E Y RP58K311A C A RP58K311B F A RP58K321A C C RP58K321B F C RP58K331A C E RP58K331B F E 2

21 RP58x NO. EA TYPICAL CHARACTERISTICS 1) vs. RP58K81x, V OUT =.8 V MODE = "L" PWM/VFM auto switching control RP58K81x, V OUT =.8 V VIN=3.6V.81 VIN=5.V I OUT (ma) VIN=3.6V.785 VIN=5.V I OUT (ma) RP58K11x, V OUT = 1. V MODE = "L" PWM/VFM auto switching control VIN=3.6V.99 VIN=5.V I OUT (ma) RP58K121x, V OUT = 1.2 V MODE = "L" PWM/VFM auto switching control RP58K11x, V OUT = 1. V VIN=3.6V.985 VIN=5.V I OUT (ma) RP58K121x, V OUT = 1.2 V VIN=3.6V 1.19 VIN=5.V VIN=3.6V VIN=5.V I OUT (ma) I OUT (ma) 21

22 RP58x NO. EA RP58K181x, V OUT = 1.8 V MODE = "L" PWM/VFM auto switching control 1.83 RP58K181x, V OUT = 1.8 V VIN=3.6V 1.79 VIN=5.V I OUT (ma) VIN=3.6V VIN=5.V I OUT (ma) RP58K331x, V OUT = 3.3 V MODE = "L" PWM/VFM auto switching control RP58K331x, V OUT = 3.3 V VIN=4.3V VIN=5.V I OUT (ma) VIN=4.3V 3.22 VIN=5.V I OUT (ma) 2) vs. Input Voltage RP58K81x, V OUT =.8 V RP58K11x, V OUT = 1. V VOUT Iout=1mA Iout=5mA VOUT Iout=1mA Iout=5mA.785 Iout=25mA.985 Iout=25mA Input Voltage Vin Input Voltage Vin 22

23 RP58x NO. EA RP58K121x, V OUT = 1.2 V RP58K181x, V OUT = 1.8 V VOUT Iout=1mA Iout=5mA Iout=25mA Input Voltage Vin Input Voltage Vin RP58K331x, V OUT = 3.3 V VOUT Iout=1mA 1.79 Iout=5mA Iout=25mA 3.32 VOUT Iout=1mA Iout=5mA 3.27 Iout=25mA Input Voltage Vin 3) vs. Temperature Vin=3.6V Temperature Ta ( C) 23

24 RP58x NO. EA ) Efficiency vs. RP58K81x, V OUT =.8 V L = MIPSZ212DR5 (212size_.5 µh) Efficiency (%) V IN = 3.6 V, V MODE = V V IN = 5. V, V MODE = V V IN = V MODE = 5. V V IN = V MODE = 3.6 V I OUT (ma) RP58K121x, V OUT = 1.2 V L = MIPSZ212DR5 (212size_.5 µh) Efficiency (%) V IN = 3.6 V, V MODE = V V IN = 5. V, V MODE = V V IN = V MODE = 5. V V IN = V MODE = 3.6 V I OUT (ma) RP58K11x, V OUT = 1. V L = MIPSZ212DR5 (212size_.5 µh) Efficiency (%) V IN = 3.6 V, V MODE = V V IN = 5. V, V MODE = V V IN = V MODE = 5. V V IN = V MODE = 3.6 V I OUT (ma) RP58K181x, V OUT = 1.8 V L = MIPSZ212DR5 (212size_.5 µh) Efficiency (%) V IN = 3.6 V, V MODE = V V IN = 5. V, V MODE = V V IN = V MODE = 5. V V IN = V MODE = 3.6 V I OUT (ma) RP58K331x, V OUT = 3.3 V L = MIPSZ212D1R (212size_1. µh) Efficiency (%) 1 9 V IN = 4.3 V, V MODE = V V IN = 5. V, V MODE = V V IN = V MODE = 5. V V IN = V MODE = 4.3 V I OUT (ma) 24

25 RP58x NO. EA RP58K81x, V OUT =.8 V L = MDT168CHR47N (168size_.47 µh) Efficiency (%) V IN = 5. V, V MODE = V V IN = 3.6 V, V MODE = V V IN = V MODE = 5. V V IN = V MODE = 3.6 V I OUT (ma) RP58K121x, V OUT = 1.2 V L = MDT168CHR47N (168size_.47 µh) Efficiency (%) V IN = 3.6 V, V MODE = V V IN = 5. V, V MODE = V V IN = V MODE = 5. V V IN = V MODE = 3.6 V I OUT (ma) RP58K11x, V OUT = 1. V L = MDT168CHR47N (168size_.47 µh) Efficiency (%) V IN = 5. V, V MODE = V V IN = 3.6 V, V MODE = V V IN = V MODE = 5. V 2 1 V IN = V MODE = 3.6 V I OUT (ma) RP58K181x, V OUT = 1.8 V L = MDT168CHR47N (168size_.47 µh) Efficiency (%) V IN = 5. V, V MODE = V V IN = 3.6 V, V MODE = V V IN = V MODE = 5. V 2 1 V IN = V MODE = 3.6 V I OUT (ma) RP58K331x, V OUT = 3.3 V L = MDT168CH1RN (168size_1. µh) Efficiency (%) VIN=4.3V,VMODE=V VIN=5.V,VMODE=V VIN=VMODE=4.3V VIN=VMODE=5.V I OUT (ma) 25

26 RP58x NO. EA ) Supply Current vs. Temperature 6) Supply Current vs. Input Voltage RP58K181x, V OUT = 1.8 V (V IN = 5.5 V) MODE = "L" PWM/VFM auto switching control RP58K181x, V OUT = 1.8 V MODE = "L" PWM/VFM auto switching control Vin=5.5V Closed Loop Closed Loop Supply Current (ua) Open Loop Supply Current (ua) Open Loop Temperature Ta ( C) Input Voltage VIN 7) Waveform RP58K81x, V OUT =.8 V (V IN = 3.6 V) RP58K81x, V OUT =.8 V (V IN = 3.6 V) MODE = "L" PWM/VFM auto switching control VOUT IL Inductor Current IL (ma) VOUT IL I OUT =1mA RP58K121x, V OUT = 1.2 V (V IN = 3.6 V) RP58K121x, V OUT = 1.2 V (V IN = 3.6 V) MODE = "L" PWM/VFM auto switching control MODE = H" forced PWM control Inductor Current IL (ma) VOUT I OUT =1mA IL Inductor Current IL (ma) VOUT I OUT =1mA IL Inductor Current IL (ma) 26

27 RP58x NO. EA RP58K181x, V OUT = 1.8 V (V IN = 3.6 V) RP58K181x, V OUT = 1.8 V (V IN = 3.6 V) MODE = "L" PWM/VFM auto switching control VOUT I OUT =1mA IL Inductor Current IL (ma) VOUT I OUT =1mA RP58K331x, V OUT = 3.3 V (V IN = 4.3 V) RP58K331x, V OUT = 3.3 V (V IN = 4.3 V) MODE = "L" PWM/VFM auto switching control IL Inductor Current IL (ma) VOUT I OUT =1mA IL Inductor Current IL (ma) VOUT I OUT =1mA IL Inductor Current IL (ma) 8) Frequency vs. Input Voltage RP58K181x, V OUT = 1.8 V Frequency (MHz) A@25 C A@-4 C A@85 C Input Voltage 27

28 RP58x NO. EA ) Frequency vs. Input Voltage with Various s RP58K121x, V OUT = 1.2 V RP58K181x, V OUT = 1.8 V Frequency (MHz) A@25 C.1A@25 C.3A@25 C.6A@25 C Frequency (MHz) A@25 C.1A@25 C.3A@25 C.6A@25 C Input Voltage Input Voltage 1) VFM Frequency vs. RP58K121x, V OUT = 1.2 V MODE = "L" PWM/VFM auto switching control RP58K181x, V OUT = 1.8 V MODE = "L" PWM/VFM auto switching control Frequency (khz) V@25 C 3.6V@25 C 5.V@25 C Frequency (khz) V@25 C 3.6V@25 C 5.V@25 C (ma) (ma) 11) Soft-start Time vs. Temperature 12 Soft Start Time Tstart (us) Temperature Ta ( C) 28

29 RP58x NO. EA ) UVLO Detector Threshold/ Released Voltage vs. Temperature UVLO Detector Threshold UVLO Release Voltage UVLO 検出電圧 UVLO UVLO 検出電圧 UVLO Temperature Ta ( C) Temperature Ta ( C) 13) CE Input Voltage vs. Temperature CE = "H" Input Voltage (V IN = 5.5 V) CE = "H" Input Voltage (V IN = 2.3 V) CE-H 入力電圧 VCEH CE-L 入力電圧 VCEL Temperature Ta ( C) Temperature Ta ( C) 14) L X Current Limit vs. Temperature 15) Standby Current vs. Temperature LX Current Limit ILXlim (ma) Standby Current I STANDBY (ua) Temperature Ta ( C) Temperature Ta ( C) 29

30 RP58x NO. EA ) Nch Transistor On Resistance vs. Temperature 17) Pch Transistor On Resistance vs. Temperature.6.6 On Resistance of Nch Tr ( Ω) On Resistance of Pch Tr ( Ω) Temperature ( C) Temperature ( C) 18) Load Transient Response (C OUT = 4.7 µf, C15X5RJ475M) RP58K81x (V IN = 3.6 V, V OUT =.8 V) RP58K81x (V IN = 3.6 V, V OUT =.8 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K81x (V IN = 3.6 V, V OUT =.8 V) RP58K81x (V IN = 3.6 V, V OUT =.8 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) ma --> 5 ma IOUT (ma) ma --> 2 ma IOUT (ma)

31 RP58x NO. EA RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) ma --> 5 ma IOUT (ma) ma --> 2 ma IOUT (ma) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma)

32 RP58x NO. EA RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) ma --> 5 ma IOUT (ma) ma --> 2 ma IOUT (ma) RP58K331x (V IN = 5. V, V OUT = 3.3 V) RP58K331x (V IN = 5. V, V OUT = 3.3 V) L = MIPSZ212D1R (212size_1. µh) L = MIPSZ212D1R (212size_1. µh) ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K331x (V IN = 5. V, V OUT = 3.3 V) RP58K331x (V IN = 5. V, V OUT = 3.3 V) L = MIPSZ212D1R (212size_1. µh) L = MIPSZ212D1R (212size_1. µh) ma --> IOUT (ma) ma --> 2 ma IOUT (ma)

33 RP58x NO. EA Load Transient Response (C OUT = 4.7µF, C15X5RJ475M) RP58K81x (V IN = 3.6 V, V OUT =.8 V) RP58K81x (V IN = 3.6 V, V OUT =.8 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) MODE = "L" PWM/VFM auto switching control MODE = "L" PWM/VFM auto switching control ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) MODE = "L" PWM/VFM auto switching control MODE = "L" PWM/VFM auto switching control ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) L = MIPSZ212DR5 (212size_.5 µh) L = MIPSZ212DR5 (212size_.5 µh) MODE = "L" PWM/VFM auto switching control MODE = "L" PWM/VFM auto switching control ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma)

34 RP58x NO. EA RP58K331x (V IN = 5. V, V OUT = 3.3 V) RP58K331x (V IN = 5. V, V OUT = 3.3 V) L = MIPSZ212D1R (212size_1. µh) L = MIPSZ212D1R (212size_1. µh) MODE = "L" PWM/VFM auto switching control MODE = "L" PWM/VFM auto switching control ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) Load Transient Response (C OUT = 4.7 µf, C15X5RJ475M) RP58K81x (V IN = 3.6 V, V OUT =.8 V) RP58K81x (V IN = 3.6 V, V OUT =.8 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K81x (V IN = 3.6 V, V OUT =.8 V) RP58K81x (V IN = 3.6 V, V OUT =.8 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) ma --> 5 ma IOUT (ma) ma --> 2 ma IOUT (ma)

35 RP58x NO. EA RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) ma --> 3 ma 2 IOUT (ma) ma --> 1 ma Output V lt 2 IOUT (ma) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) ma --> 5 ma IOUT (ma) ma --> 2 ma IOUT (ma) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) ma --> 3 ma 2 IOUT (ma) ma --> 1 ma 2 IOUT (ma)

36 RP58x NO. EA RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) ma --> 5 ma IOUT (ma) ma --> 2 ma IOUT (ma) RP58K331x (V IN = 5. V, V OUT = 3.3 V) RP58K331x (V IN = 5. V, V OUT = 3.3 V) L = MDT168CH1RN(168size_1. µh) L = MDT168CH1RN (168size_1. µh) ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K331x (V IN = 5. V, V OUT = 3.3 V) RP58K331x (V IN = 5. V, V OUT = 3.3 V) L = MDT168CH1RN (168size_1. µh) L = MDT168CH1RN (168size_1. µh) ma --> 5 ma IOUT (ma) ma --> 2 ma IOUT (ma)

37 RP58x NO. EA Load Transient Response (C OUT = 4.7µF, C15X5RJ475M) RP58K81x (V IN = 3.6 V, V OUT =.8 V) RP58K81x (V IN = 3.6V, V OUT =.8 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) MODE = "L" PWM/VFM auto switching control MODE = "L" PWM/VFM auto switching control ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) RP58K121x (V IN = 3.6 V, V OUT = 1.2 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) MODE = "L" PWM/VFM auto switching control MODE = "L" PWM/VFM auto switching control ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) RP58K181x (V IN = 3.6 V, V OUT = 1.8 V) L = MDT168CHR47N (168size_.47 µh) L = MDT168CHR47N (168size_.47 µh) MODE = "L" PWM/VFM auto switching control MODE = "L" PWM/VFM auto switching control ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma)

38 RP58x NO. EA RP58K331x (V IN = 5. V, V OUT = 3.3 V) RP58K331x (V IN = 5. V, V OUT = 3.3 V) L = MDT168CH1RN (168size_1. µh) L = MDT168CH1RN (168size_1. µh) MODE = "L" PWM/VFM auto switching control MODE = "L" PWM/VFM auto switching control ma --> 3 ma 4 2 IOUT (ma) ma --> 1 ma 4 2 IOUT (ma) ) Mode Switching Waveform RP58K121x (V IN = 3.6 V, V OUT = 1.2 V, I OUT = 1 ma) MODE = "L" MODE = "H" RP58K121x (V IN = 3.6 V, V OUT = 1.2 V, I OUT = 1 ma) MODE = "H" MODE = "L" VOUT Mode Input Voltage VMODE VOUT Mode Input Voltage VMODE RP58K181x (V IN = 3.6 V, V OUT = 1.8 V, I OUT = 1 ma) MODE = "L" MODE = "H" RP58K181x (V IN = 3.6V, V OUT = 1.8 V, I OUT = 1 ma) MODE = "H" MODE = "L" 6 6 VOUT Mode Input Voltage VMODE VOUT Mode Input Voltage VMODE

39 Halogen Free For the conservation of the global environment, Ricoh is advancing the decrease of the negative environmental impact material. After Apr. 1, 26, we will ship out the lead free products only. Thus, all products that will be shipped from now on comply with RoHS Directive. Basically after Apr. 1, 212, we will ship out the Power Management ICs of the Halogen Free products only. (Ricoh Halogen Free products are also Antimony Free.)