1.5A Ultra Low Dropout Linear Regulator TJ3965

Transcription

1 FEATURES Ultra Low Dropout Voltage Low Ground Pin Current Excellent Line and Load Regulation Guaranteed Output Current of 1.5A Available in SOT223, MSOP8, SOP8, SOP8PP, TO263, and TO220 Packages Fixed Output Voltages : 1.2V, 1.8V, 2.5V, 3.3V, and 5.0V SSE Option Improves Load Regulation OverTemperature/OverCurrent Protection 40 to 125 Junction Temperature Range SOT223 3L / 5LPKG MSOP8 / SOP8 / SOP8PP TO263 3L / 5LPKG APPLICATION Battery Powered Equipments Motherboards and Graphic Cards Microprocessor Power Supplies Peripheral Cards High Efficiency Linear Regulators Battery Chargers DESCRIPSION The TJ3965 series of high performance ultra lowdropout linear regulators operates from 2.5V to 6V input supply and provides ultra lowdropout voltage, high output current with low ground current. Wide range of preset output voltage options are available. These ultra low dropout linear regulators respond fast to step changes in load which makes them suitable for low voltage ORDERING INFORMATION Device (Marking) 3965SADJ 3965SX.X TJ3965MDADJ TJ3965MDX.X TJ3965DADJ TJ3965DX.X TJ3965DPADJ TJ3965DPX.X TJ3965RADJ TJ3965RX.X TJ3965TADJ TJ3965TX.X TO220 3L / 5L PKG Package SOT223 3L/5L MSOP8 Oct R /9 HTC SOP8 SOP8PP TO263 3L/5L TO220 3L/5L µprocessor applications. The TJ3965 is developed on a X.X = Output Voltage = 1.2, 1.8, 2.5, 3.3, and 5.0 CMOS process technology which allows low quiescent current operation independent of output load current. This CMOS process also allows the TJ3965 to operate under extremely low dropout conditions. Absolute Maximum Ratings CHARACTERISTIC SYMBOL MIN. MAX. UNIT Input Supply Voltage (Survival) V IN 6.5 V Enable Input Voltage (Survival) V 6.5 V Maximum Output Current I MAX 1.5 A Lead Temperature (Soldering, 5 sec) T SOL 260 Storage Temperature Range T STG Operating Junction Temperature Range T JOPR

2 Ordering Information V OUT Package Order No. Description Package Marking Supplied As ADJ SOT223 5L TJ3965SADJ5L 1.5A, Adjustable, Enable 3965ADJ Reel ADJ MSOP8 TJ3965MDADJ8L 1.5A, Adjustable, Enable TJ3965ADJ Reel ADJ SOP8 TJ3965DADJ8L 1.5A, Adjustable, Enable TJ3965ADJ Reel ADJ SOP8PP TJ3965DPADJ8L 1.5A, Adjustable, Enable TJ3965ADJ Reel ADJ TO263 5L TJ3965RADJ5L 1.5A, Adjustable, Enable TJ3965ADJ Reel or Tube ADJ TO220 5L TJ3965TADJ5L 1.5A, Adjustable, Enable TJ3965ADJ Tube 1.2V SOT223 3L TJ3965S1.2V3L 1.5A Reel 1.2V SOT223 5L TJ3965S1.2V5L 1.5A, Enable, SSE Reel 1.2V MSOP8 TJ3965MD1.2V8L 1.5A, Enable, SSE TJ Reel 1.2V SOP8 TJ3965D1.2V8L 1.5A, Enable, SSE TJ Reel 1.2V SOP8PP TJ3965DP1.28L 1.5A, Enable, SSE TJ Reel 1.2V TO263 3L TJ3965R1.2V3L 1.5A TJ Reel or Tube 1.2V TO263 5L TJ3965R1.2V5L 1.5A, Enable, SSE TJ Reel or Tube 1.2V TO220 3L TJ3965T1.2V3L 1.5A TJ Tube 1.2V TO220 5L TJ3965T1.2V5L 1.5A, Enable, SSE TJ Tube 1.8V SOT223 3L TJ3965S1.8V3L 1.5A Reel 1.8V SOT223 5L TJ3965S1.8V5L 1.5A, Enable, SSE Reel 1.8V MSOP8 TJ3965MD1.8V8L 1.5A, Enable, SSE TJ Reel 1.8V SOP8 TJ3965D1.8V8L 1.5A, Enable, SSE TJ Reel 1.8V SOP8PP TJ3965DP1.8V8L 1.5A, Enable, SSE TJ Reel 1.8V TO 263 3L TJ3965R1.8V3L 1.5A TJ Reel or Tube 1.8V TO 263 5L TJ3965R1.8V5L 1.5A, Enable, SSE TJ Reel or Tube 1.8V TO220 3L TJ3965T1.8V3L 1.5A TJ Tube 1.8V TO220 5L TJ3965T1.8V5L 1.5A, Enable, SSE TJ Tube 2.5V SOT223 3L TJ3965S2.5V3L 1.5A Reel 2.5V SOT223 5L TJ3965S2.5V5L 1.5A, Enable, SSE Reel 2.5V MSOP8 TJ3965MD2.5V8L 1.5A, Enable, SSE TJ Reel 2.5V SOP8 TJ3965D2.5V8L 1.5A, Enable, SSE TJ Reel 2.5V SOP8PP TJ3965DP2.5V8L 1.5A, Enable, SSE TJ Reel 2.5V TO 263 3L TJ3965R2.5V3L 1.5A TJ Reel or Tube 2.5V TO 263 5L TJ3965R2.5V5L 1.5A, Enable, SSE TJ Reel or Tube 2.5V TO220 3L TJ3965T2.5V3L 1.5A TJ Tube 2.5V TO220 5L TJ3965T2.5V5L 1.5A, Enable, SSE TJ Tube Oct R /9 HTC

3 Ordering Information (Continued) V OUT Package Order No. Description Package Marking Supplied As 3.3V SOT223 3L TJ3965S3.3V3L 1.5A Reel 3.3V SOT223 5L TJ3965S3.3V5L 1.5A, Enable, SSE Reel 3.3V MSOP8 TJ3965MD3.3V8L 1.5A, Enable, SSE TJ Reel 3.3V SOP8 TJ3965D3.3V8L 1.5A, Enable, SSE TJ Reel 3.3V SOP8PP TJ3965DP3.3V8L 1.5A, Enable, SSE TJ Reel 3.3V TO 263 3L TJ3965R3.3V3L 1.5A TJ Reel or Tube 3.3V TO 263 5L TJ3965R3.3V5L 1.5A, Enable, SSE TJ Reel or Tube 3.3V TO220 3L TJ3965T3.3V3L 1.5A TJ Tube 3.3V TO220 5L TJ3965T3.3V5L 1.5A, Enable, SSE TJ Tube 5.0V SOT223 3L TJ3965S5.0V3L 1.5A Reel 5.0V SOT223 5L TJ3965S5.0V5L 1.5A, Enable, SSE Reel 5.0V MSOP8 TJ3965MD5.0V8L 1.5A, Enable, SSE TJ Reel 5.0V SOP8 TJ3965D5.0V8L 1.5A, Enable, SSE TJ Reel 5.0V SOP8PP TJ3965DP5.0V8L 1.5A, Enable, SSE TJ Reel 5.0V TO 263 3L TJ3965R5.0V3L 1.5A TJ Reel or Tube 5.0V TO 263 5L TJ3965R5.0V5L 1.5A, Enable, SSE TJ Reel or Tube 5.0V TO220 3L TJ3965T5.0V3L 1.5A TJ Tube 5.0V TO220 5L TJ3965T5.0V5L 1.5A, Enable, SSE TJ Tube T J D P 3.3 V 8 L Lead Count : 3L(Fixed Output Only) / 5L / 8L Output Voltage : ADJ / 1.2V / 1.8V / 2.5V / 3.3V / 5.0V Package Type S MD D DP R T : SOT223 : MSOP8 : SOP8 : SOP8PP : TO263 : TO220 Root Name Product Code Oct R /9 HTC

4 PIN CONFIGURATION SOT2233L SOT2235L MSOP8 SOP8 / SOP8PP TO2633L TO2635L TO2203L TO2205L PIN DESCRIPTION Pin No. SOT223 / SOT263 / TO220 3 LEAD SOT223 5 LEAD Name Function Name Function 1 V IN Input Supply Chip Enable 2 Ground V IN Input Supply 3 V OUT Output Voltage V OUT Output Voltage 4 SSE/ADJ Remote Sense or Output Adjust 5 Ground Pin No. TO263 / TO220 5 LEAD MSOP8 / SOP8 / SOP8PP 8 LEAD Name Function Name Function 1 Chip Enable Chip Enable 2 V IN Input Supply V IN Input Supply 3 Ground V OUT Output Voltage 4 V OUT Output Voltage SSE/ADJ 5 / 6/ 7 / 8 SSE/ADJ Remote Sense or Output Adjust Remote Sense or Output Adjust Ground Oct R /9 HTC

5 TYPICAL APPLICATION Typical 3 Pin Application INPUT C IN 68μF V IN TJ3965 V OUT C OUT 33μF OUTPUT Typical 5 / 8 Pin Application INPUT C IN 68μF V IN TJ3965 V OUT SSE C OUT 33μF OUTPUT 5 / 8 Pin Remote Load Sense Application INPUT V IN V OUT OUTPUT C IN 68μF TJ3965 SSE C OUT 33μF L O A D Typical Adjustable Version Application INPUT C IN 68μF V IN TJ3965 V OUT ADJ R 2 OUTPUT C OUT 33μF R 1 * TJ3965 can deliver a continuous current of 1.5A over the full operating temperature. However, the output current is limited by the restriction of power dissipation which differs from packages. A heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. With respect to the applied package, the maximum output current of 1.5A may be still undeliverable. * See Application Information Oct R /9 HTC

6 (Note 1) ELECTRICAL CHARACTERISTICS Limits in standard typeface are for TJ=25, and limits in boldface type apply over the full operating temperature range. (Note 2) Unless otherwise specified: V IN = V O(NOM) 1 V, I L = 10 ma, C IN = 68 uf, C OUT = 33 uf, V = V IN 0.3 V PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Output Voltage Tolerance Adjustable Pin Voltage (ADJ version) V O V ADJ 10 ma < I L < 1.5 A V OUT1 V < V IN < 6 V 10 ma < I L < 1.5 A V OUT1.5 V < V IN < 6 V Line Regulation (Note 3) V LINE V OUT1 V < V IN < 6 V 0.25 Load Regulation (Note 3, 4) V LOAD 10 ma < I L < 1.5 A 0.25 (Note 5) Dropout Voltage V (Note 6) Ground Pin Current I DROP I L = 150 ma 40 I L = 1.5 A 380 I L = 150 ma 30 I L = 1.5 A 30 Ground Pin Current (Note 7) I 2 V < 0.2 V 30 Output Peak Current I PEAK % V %/V % mv ua ua 2.2 A Thermal Shutdown Temperature T SD 165 Thermal Shutdown Hysteresis T SD 10 Enable threshold Logic Low V IL Output = Low V Logic High V IH Output = High V IN0.3 V IN V Enable Input Current I V = V IN 5 20 na Note 1. Stresses listed as the absolute maximum ratings may cause permanent damage to the device. These are for stress ratings. Functional operating 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 possibly to affect device reliability. Note 2. The minimum operating value for input voltage is equal to either (V OUT,NOM V DROP) or 2.5V, whichever is greater. Note 3. Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage. Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. Note 4. Regulation is measured at constant junction temperature by using a 20ms current pulse. Devices are tested for load regulation in the load range from 10mA to 1.5A Note 5. Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the dropout voltage is nothing but the input to output differential, since the minimum input voltage is 2.5V Note 6. Ground current, or quiescent current, is the difference between input and output currents. It's defined by I 1 = I IN I OUT under the given loading condition. The total current drawn from the supply is the sum of the load current plus the ground pin current. Note 7. Ground current, or standby current, is the input current drawn by a regulator when the output voltage is disabled by an enable signal. Oct R /9 HTC

7 TYPICAL OPERATING CHARACTERISTICS Ambient Temperature vs. Output Voltage Change Output Current vs. Dropout Voltage Power Dissipation vs. Case Temperature, MSOP8 Power Dissipation vs. Case Temperature, SOP8 Power Dissipation vs. Case Temperature, SOP8PP T.B.D. Oct R /9 HTC

8 APPLICATION INFORMATION Output Adjustment (Adjustable Version) An adjustable output device has output voltage range of 1.145V to 5.0V. To obtain a desired output voltage, the following equation can be used with R1 resistor range of 10kΩ to 220kΩ V = R OUT To enhance output stability, a capacitor of 68pF to 100pF can be placed in series with V OUT and ADJ. SSE Pin In applications where the regulator output is not very close to the load, the TJ3965 can provide better remote load regulation characteristics using the SSE pin. TJ3965 regulates the voltage at the output pin. Hence, the voltage at the remote load will be lower than the voltage at the output pin as a value of the voltage drop across the trace series resistance. If the sense option pin is not required, the sense pin must be connected to the V OUT pin. Connecting the sense pin to the remote load will provide regulation at the remote load because the TJ3965 regulates the voltage at the sense pin when the sense option pin is used. R Maximum Output Current Capability The TJ3965 can deliver a continuous current of 1.5A over the full operating junction temperature range. However, the output current is limited by the restriction of power dissipation which differs from packages. A heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. With respect to the applied package, the maximum output current of 1.5A may be still undeliverable due to the restriction of the power dissipation of TJ3965. Under all possible conditions, the junction temperature must be within the range specified under operating conditions. The temperatures over the device are given by: T C = T A P D X θ CA T J = T C P D X θ JC T J = T A P D X θ JA where T J is the junction temperature, T C is the case temperature, T A is the ambient temperature, P D is the total power dissipation of the device, θ CA is the thermal resistance of casetoambient, θ JC is the thermal Oct R /9 HTC

9 resistance of junctiontocase, and θ JA is the thermal resistance of junction to ambient. The total power dissipation of the device is given by: P D = P IN P OUT = (V IN X I IN ) (V OUT X I OUT ) = (V IN X (I OUT I )) (V OUT X I OUT ) = (V IN V OUT ) X I OUT V IN X I where I is the operating ground current of the device which is specified at the Electrical Characteristics. The maximum allowable temperature rise (T Rmax ) depends on the maximum ambient temperature (T Amax ) of the application, and the maximum allowable junction temperature (T Jmax ): T Rmax = T Jmax T Amax The maximum allowable value for junctiontoambient thermal resistance, θ JA, can be calculated using the formula: θ JA = T Rmax / P D TJ3965 is available in SOT223, MSOP8, SOP8PP, TO263, and TO220 packages. The thermal resistance depends on amount of copper area or heat sink, and on air flow. If the maximum allowable value of θ JA calculated above is over 140 C/W for SO223 package, over 220 C/W for MSOP8 package, over 165 C/W for SOP8 package, over 170 C/W for SOP8PP package, over 80 C/W for TO263 package, over 75 C/W for TO220 package, no heat sink is needed since the package can dissipate enough heat to satisfy these requirements. If the value for allowable θ JA falls near or below these limits, a heat sink or proper area of copper plane is required. In summary, the absolute maximum ratings of thermal resistances are as follow: Absolute Maximum Ratings of Thermal Resistance No heat sink / No air flow / No adjacent heat source / T A = 25 C Characteristic Symbol Max. Rating Unit Thermal Resistance JunctionToAmbient / SOT223 θ JASOT C/W Thermal Resistance JunctionToAmbient / MSOP8 θ JAMSOP8 220 C/W Thermal Resistance JunctionToAmbient / SOP8 θ JASOP8 165 C/W Thermal Resistance JunctionToAmbient / SOP8PP θ JASOP8PP 175 C/W Thermal Resistance JunctionToAmbient / TO263 θ JATO C/W Thermal Resistance JunctionToAmbient / TO220 θ JATO C/W T.B.D. Oct R /9 HTC