RT mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator. General Description. Features. Applications. Ordering Information. Marking Information
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1 3mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator General Description The RT9193 is designed for portable RF and wireless applications with demanding performance and space requirements. The RT9193 performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. A noise bypass pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The RT9193 also works with low-esr ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The RT9193 consumes less than.1μa in shutdown mode and has fast turn-on time less than μs. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the -lead of SC-7, SOT-23 and WDFN-6L 2x2 packages. Ordering Information RT9193- Package Type U : SC-7- B : SOT-23- QW : WDFN-6L 2x2 (W-Type) Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) 1 : 1.V 16 : 1.6V : 49 : 4.9V :.V 1H : 1.8V 2H : 2.8V 4G : 4.7V Note : RichTek Pb-free and Green products are : RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-2. Suitable for use in SnPb or Pb-free soldering processes. 1% matte tin (Sn) plating. Features Ultra-Low-Noise for RF Application Ultra-Fast Response in Line/Load Transient Quick Start-Up (Typically μs) <.1μA Standby Current When Shutdown Low Dropout : 3mA Wide Operating Voltage Ranges : 2.V to.v TTL-Logic-Controlled Shutdown Input Low Temperature Coefficient Current Limiting Protection Thermal Shutdown Protection Only 1μF Output Capacitor Required for Stability High Power Supply Rejection Ratio Custom Voltage Available RoHS Compliant and 1% Lead (Pb)-Free Applications CDMA/GSM Cellular Handsets Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments PCMCIA Cards Portable Information Appliances Marking Information For marking information, contact our sales representative directly or through a RichTek distributor located in your area, otherwise visit our website for detail. Pin Configurations VIN GND EN SC-7-/SOT-23- (TOP VIEW) VOUT BP EN 1 GND 2 VIN WDFN-6L 2x2 BP NC VOUT DS March 27 1
2 Typical Application Circuit V IN C IN 1uF/X7R RT9193 VIN VOUT GND VOUT C OUT 1uF/X7R Chip Enable EN BP C BP 22nF Functional Pin Description Pin Name EN BP GND VOUT VIN Pin Function Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 1kΩ resistor connected to GND when the control signal is floating. Reference Noise Bypass Ground Power Input Voltage Function Block Diagram EN Quick Start Shutdown and Logic Control VIN BP V REF + - Error Amplifier MOS Driver Current-Limit and Thermal Protection VOUT GND 2 DS March 27
3 Absolute Maximum Ratings (Note 1) Supply Input Voltage V Electrical Characteristics (VIN = VOUT + 1V, CIN = COUT = 1μF, CBP = 22nF, TA = 2 C, unless otherwise specified) DS March 27 RT9193 Power Dissipation, P T A = 2 C SC mW SOT mW WDFN-6L 2x mW Package Thermal Resistance (Note 4) SOT-7-, θ JA C/W SOT-23-, θ JA C/W WDFN-6L 2x2, θ JA C/W Junction Temperature C Lead Temperature (Soldering, 1 sec.) C Storage Temperature Range C to 1 C ESD Susceptibility (Note 2) HBM (Human Body Mode) kV MM (Machine Mode) V Recommended Operating Conditions (Note 3) Supply Input Voltage V to.v EN Input Voltage V to.v Junction Temperature Range Ambient Temperature Range Parameter Symbol Test Conditions Min Typ Max Units Accuracy ΔV OUT I OUT = 1mA % Current Limit I LIM R LOAD = 1Ω ma Quiescent Current I Q V EN 1.2V, I OUT = ma μa Dropout Voltage (Note ) V DROP Line Regulation ΔV LINE I OUT = 2mA, V OUT > 2.8V 17 2 I OUT = 3mA, V OUT > 2.8V V IN = (V OUT + 1V) to.v, I OUT = 1mA mv % Load Regulation ΔV LOAD 1mA < I OUT < 3mA % Standby Current I STBY V EN = GND, Shutdown μa EN Input Bias Current I IBSD V EN = GND or VIN -- 1 na EN Threshold Output Noise Voltage Power Supply Rejection Rate Logic-Low Voltage V IL V IN = 3V to.v, Shutdown Logic-High Voltage V IH V IN = 3V to.v, Start-Up e NO 1Hz to 1kHz, I OUT = 2mA C OUT = 1μF V μv RMS f = 1Hz PSRR C OUT = 1μF, I OUT = 1mA f = 1kHz C to 12 C 4 C to 8 C Thermal Shutdown Temperature T SD C db To be continued 3
4 Parameter Symbol Test Conditions Min Typ Max Units Thermal Shutdown Temperature Hysteresis ΔT SD C Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. Note 2. Devices are ESD sensitive. Handling precaution recommended. Note 3. The device is not guaranteed to function outside its operating conditions. Note 4. θja is measured in the natural convection at TA = 2 C on a low effective thermal conductivity test board (Single Layer, 1S) of JEDEC 1-3 thermal measurement standard. Note. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) 1mV. 4 DS March 27
5 Typical Operating Characteristics (V) vs. Temperature RT9193-1CU VIN = 3.3V CIN = COUT = 1uF X7R Quiescent Current (ua) Quiescent Current vs. Temperature RT9193-1CU VIN = 3.3V CIN = COUT = 1uF X7R Temperature ( C) Temperature ( C) Dropout Voltage (mv) Dropout Voltage vs. Load Current RT CB CIN = COUT = 1uF TJ = 2 C TJ = 12 C TJ = -4 C PSRR (db) VIN = 4V to V CIN = COUT = 1uF, X7R PSRR ILoad = 1mA ILoad = 1mA Load Current (A) K 1 1K 1K 1 1M Frequency (khz) (Hz) EN Pin Shoutdown Threshold (V) EN Pin Shoutdown Threshold vs. Temperature RT9193-1CU VIN = 3.3V CIN = COUT = 1uF X7R Temperature ( C) EN Pin Voltage (V) (V) EN Pin Shutdown Response VIN = V CIN = COUT = 1uF Time (μs/div) RT CU No Load DS March 27
6 Load Transient Response Load Transient Response Load Current (ma) 1 VIN = V, VOUT = 2.8V CIN = COUT = 1uF ILoad = 1mA to 6mA Load Current (ma) 4 2 VIN = V, VOUT = 2.8V CIN = COUT = 1uF ILoad = 1mA to 2mA Deviation (mv) 2-2 Deviation (mv) - Time (μs/div) Time (μs/div) Line Transient Response Line Transient Response Input Voltage Deviation (V) 6 4 VIN = 4V to V COUT = 1uF RT9193-2CB ILoad = 1mA Input Voltage Deviation (V) 6 4 VIN = 4V to V COUT = 1uF RT9193-2CB ILoad = 1mA Deviation (mv) 1-1 Deviation (mv) 1-1 Time (μs/div) Time (1μs/Div) Noise Noise VIN = 4.V CIN = COUT = 1uF, X7R RT9193-3CB ILoad = ma VIN = 4.V CIN = COUT = 1uF, X7R RT9193-1CU ILoad = ma 2 2 Noise (μv) 1-1 Noise (μv) Time (1ms/Div) f = 1Hz to 1kHz Time (1ms/Div) f = 1Hz to 1kHz 6 DS March 27
7 Start Up EN Pin Voltage (V) 1 VIN = V CIN = COUT = 1uF RT CU No Load (V) 2 1 Time (1μs/Div) DS March 27 7
8 Applications Information Like any low-dropout regulator, the external capacitors used with the RT9193 must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1μF on the RT9193 input and the amount of capacitance can be increased without limit. The input capacitor must be located a distance of not more than. inch from the input pin of the IC and returned to a clean analog ground. Any good quality ceramic or tantalum can be used for this capacitor. The capacitor with larger value and lower ESR (equivalent series resistance) provides better PSRR and line-transient response. The output capacitor must meet both requirements for minimum amount of capacitance and ESR in all LDOs application. The RT9193 is designed specifically to work with low ESR ceramic output capacitor in space-saving and performance consideration. Using a ceramic capacitor whose value is at least 1μF with ESR is > 2mΩ on the RT9193 output ensures stability. The RT9193 still works well with output capacitor of other types due to the wide stable ESR range. Figure 1 shows the curves of allowable ESR range as a function of load current for various output capacitor values. Output capacitor of larger capacitance can reduce noise and improve load transient response, stability, and PSRR. The output capacitor should be located not more than. inch from the V OUT pin of the RT9193 and returned to a clean analog ground. COUT ESR (Ω) Region of Stable C OUT ESR vs. Load Current Instable Stable Simulation Verify Load Current (ma) Figure 1 RT9193-1CU CIN = COUT = 1uF, X7R Bypass Capacitor and Low Noise Connecting a 22nF between the BP pin and GND pin significantly reduces noise on the regulator output, it is critical that the capacitor connection between the BP pin and GND pin be direct and PCB traces should be as short as possible. There is a relationship between the bypass capacitor value and the LDO regulator turn on time. DC leakage on this pin can affect the LDO regulator output noise and voltage regulation performance. Enable Function The RT9193 features an LDO regulator enable/disable function. To assure the LDO regulator will switch on, the EN turn on control level must be greater than 1.2 volts. The LDO regulator will go into the shutdown mode when the voltage on the EN pin falls below.4 volts. For to protecting the system, the RT9193 have a quick-discharge function. If the enable function is not needed in a specific application, it may be tied to V IN to keep the LDO regulator in a continuously on state. Thermal Considerations Thermal protection limits power dissipation in RT9193. When the operation junction temperature exceeds 16 C, the OTP circuit starts the thermal shutdown function turn the pass element off. The pass element turn on again after the junction temperature cools by 3 C. For continue operation, do not exceed absolute maximum operation junction temperature 12 C. The power dissipation definition in device is : P D = (V IN V OUT ) x I OUT + V IN x I Q The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula : P D(MAX) = ( T J(MAX) T A ) /θ JA Where T J(MAX) is the maximum operation junction temperature 12 C, T A is the ambient temperature and the θ JA is the junction to ambient thermal resistance. 8 DS March 27
9 For recommended operating conditions specification of RT9193, where T J(MAX) is the maximum junction temperature of the die (12 C) and T A is the maximum ambient temperature. The junction to ambient thermal resistance (θ JA is layout dependent) for SOT-23- package is 2 C/W, SC-7- package is 333 C/W and WDFN-6L 2x2 package is 16 C/W on standard JEDEC 1-3 thermal test board. The maximum power dissipation at T A = 2 C can be calculated by following formula : P D(MAX) = (12 C 2 C) / 333 = 3mW (SC-7-) P D(MAX) = (12 C 2 C) / 2 = 4mW (SOT-23-) P D(MAX) = (12 C 2 C) / 16 = 66mW (WDFN-6L 2x2) The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θ JA. For RT9193 packages, the Figure 2 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. Power Dissipation (mw) WDFN-6L 2x2 SOT-23- SC Ambient Temperature ( C) Figure 2. Derating Curve for Packages DS March 27 9
10 Outline Dimension D H L C B b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A B b C D e.6.26 H L SC-7- Surface Mount Package 1 DS March 27
11 D H L C B b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A B b C D e H L SOT-23- Surface Mount Package DS March 27 11
12 D D2 L E E2 1 SEE DETAIL A A A1 A3 e b DETAIL A Pin #1 ID and Tie Bar Mark Options Note : The configuration of the Pin #1 identifier is optional, but must be located within the zone indicated. Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A A b D D E E e.6.26 L W-Type 6L DFN 2x2 Package Richtek Technology Corporation Headquarter F, No. 2, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)26789 Fax: (8863) Richtek Technology Corporation Taipei Office (Marketing) 8F, No. 137, Lane 23, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862) Fax: (8862) marketing@richtek.com DS March 27
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General Description The RT9285 is a high frequency asynchronous boost converter with internal diode, which can support 2 to 5 White LEDs for backlighting and OLED power supply. The Internal soft start
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ma, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator General Description The is designed for portable RF and wireless applications with demanding performance and space requirements. The s performance is
More informationRT9173B. 2A Bus Termination Regulator. Features. General Description. Applications. Ordering Information. Pin Configurations
A Bus Termination Regulator General Description The regulator is designed to convert voltage supplies ranging from 1.7 to 6 into a desired output voltage of which adjusted by two external voltage divider
More informationRT9296. Synchronous Boost Converter with LDO Controller. General Description. Features. Applications. Ordering Information RT9296(- )
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More informationA6318. AiT Semiconductor Inc. APPLICATION ORDERING INFORMATION
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RT974A Dual Channel, Ultra-Low Resistance Load Switch General Description The RT974A is a small, ultra-low R ON, dual channel load switch with EN controlled pin. The product contains two N-MOSFETs that
More informationBL9193 FEATURES DESCRIPTION APPLICATIONS ORDERING INFORMATION TYPICAL APPLICATION. Ultr. ast CMOS
FEATURES a-low Noise for RF Application a-f Response in Line/Load Transient Quick Start-Up (Typically 50µS)
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Peak 3A Bus Termination Regulator General Description The regulator is designed to convert voltage supplies ranging from 1.6 to 6 into a desired output voltage which adjusted by two external voltage divider
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RT8580 36V DC-DC Boost Converter General Description The RT8580 is a high performance, low noise, DC-DC Boost Converter with an integrated 0.5A, 1Ω internal switch. The RT8580's input voltage ranges from
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Micro-Power Voltage Detector with Manual Reset General Description The is a micro-power voltage detector with deglitched manual reset input which supervises the power supply voltage level for microprocessors
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RT9554A Battery Output Current Sense Protection IC General Description The RT9554A is designed for over-current detection. The current sense amplifier amplifies the voltage across resistor which is connected
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More informationRT9728A. 120mΩ, 1.3A Power Switch with Programmable Current Limit. General Description. Features. Applications. Pin Configurations
RT9728A 120mΩ, 1.3A Power Switch with Programmable Current Limit General Description The RT9728A is a cost effective, low voltage, single P-MOSFET high side power switch IC for USB application with a programmable
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3/5mA Low Dropout Linear Voltage Regulator R96/A General Description he R96/A is a 3/5mA fixed output voltage low dropout linear regulator. ypical ground current is approximately μa, from zero to maximum
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GND FEATURES Ultra-Fast Response in Line/Load Transient Low Dropout:210mV@300mA Wide Operating Voltage Range:2V to 6V Wide Output Voltage Range:1.2V to 5V Low Temperature Coefficient Current Limiting Protection
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Cost-Effective, A Peak Sink/Source Bus Termination Regulator General Description The is a simple, cost-effective and high-speed linear regulator designed to generate termination voltage in Double Data
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Tiny Package, High Efficiency, Step-Up DC/DC Converter General Description The RT9266B is a compact, high efficiency, and low voltage step-up DC/DC converter with an Adaptive Current Mode PWM control loop,
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RT8474 High oltage Multiple-Topology LED Driver with Dimming Control General Description The RT8474 is a current-mode LED driver supporting wide input voltage range from 4.5 to 50 and output voltage up
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