TL1963A-18KTTT

TL1963A-XX TI | Alldatasheet

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(TOP VIEW) DESCRIPTION/ORDERING INFORMATION TL1963A-xx www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 1.5-A LOW-NOISE FAST-TRANSIENT-RESPONSE LOW-DROPOUT REGULATOR Optimized for Fast Transient Response Reverse-Battery Protection Output Current: 1.5 A No Reverse Current Dropout Voltage: 340 mV Thermal Limiting Low Noise: µ V RMS (10 Hz to 100 kHz) 1-mA Quiescent Current 3.3-V to 2.5-V Logic Power Supplies No Protection Diodes Needed Post Regulator for Switching Supplies Controlled Quiescent Current in Dropout Fixed Output Voltages: 1.5 1.8 2.5 and 3.3 V Adjustable Output Voltage: 1.21 V to V Less Than µ A Quiescent Current in Shutdown Stable with 10- µ F Output Capacitor Stable with Ceramic Capacitors The TL1963A-xx is a low-dropout (LDO) regulator optimized for fast transient response. The device can supply 1.5 A of output current with a dropout voltage of 340 mV. Operating quiescent current is mA, dropping to less than µ A in shutdown. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators. In addition to fast transient response, the TL1963A-xx regulators have very low output noise, which makes them ideal for sensitive RF supply applications. Output voltage range is from 1.21 V to The TL1963A-xx regulators are stable with output capacitors as low as µ Small ceramic capacitors can be used without the necessary addition of ESR, as is common with other regulators. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting, and reverse-current protection. The devices are available in fixed output voltages of 1.5 1.8 2.5 and 3.3 and as an adjustable device with a 1.21-V reference voltage. The TL1963A-xx regulators are available in the 5-pin TO-263 (KTT) package. ORDERING INFORMATION (1) V OUT T A PACKAGE (2) ORDERABLE PART NUMBER TOP-SIDE MARKING (TYP) 1.5 V TL1963A-15KTTR TL1963A-15 1.8 V TL1963A-18KTTR TL1963A-18 C to 125 C 2.5 V TO-263 (KTT) Reel of 500 TL1963A-25KTTR TL1963A-25 3.3 V TL1963A-33KTTR TL1963A-33 ADJ TL1963AKTTR TL1963A (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com (2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging Please be aware that an important notice concerning availability, standard warranty, and use in critical sheet. PowerPAD, PowerFLEX are trademarks of Texas Instruments. UNLESS OTHERWISE NOTED this document contains Copyright 2008, Texas Instruments Incorporated PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

www.ti.com TERMINAL FUNCTIONS PIN

DESCRIPTION

Shutdown. The SHDN pin is used to put the TL1963A-xx regulators into a low-power shutdown state. The output is off when the SHDN pin is pulled low. The SHDN pin can be driven either by 5-V logic or open-collector logic SHDN with a pullup resistor. The pullup resistor is required to supply the pullup current of the open-collector gate, normally several microamperes, and the SHDN pin current, typically µ If unused, the SHDN pin must be connected to V IN The device is in the low-power shutdown state if the SHDN pin is not connected. Input. Power is supplied to the device through the IN pin. A bypass capacitor is required on this pin if the device is more than six inches away from the main input filter capacitor. In general, the output impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-powered circuits. A bypass capacitor (ceramic) in the range of µ F to µ F is sufficient. The TL1963A-xx regulators are designed to IN withstand reverse voltages on the IN pin with respect to ground and the OUT pin. In the case of a reverse input, which can happen if a battery is plugged in backwards, the device acts as if there is a diode in series with its input. There is no reverse current flow into the regulator, and no reverse voltage appears at the load. The device protects both itself and the load. Ground. The exposed thermal pad is connected to ground and must be soldered to the PCB for rated thermal GND performance. Output. The output supplies power to the load. A minimum output capacitor (ceramic) of µ F is required to OUT prevent oscillations. Larger output capacitors are required for transients. Adjust. For the adjustable TL1963A, this is the input to the error amplifier. This pin is internally clamped to ADJ It has a bias current of µ A that flows into the pin. The ADJ pin voltage is 1.21 V referenced to ground, and the output voltage range is 1.21 V to Sense. For fixed voltage versions of the TL1963A-xx (TL1963A-1.5, TL1963A-1.8, TL1963A-2.5, and TL1963A-3.3), the SENSE pin is the input to the error amplifier. Optimum regulation is obtained at the point where the SENSE pin is connected to the OUT pin of the regulator. In critical applications, small voltage drops are caused by the resistance P of PC traces between the regulator and the load. These may be eliminated by SENSE connecting the SENSE pin to the output at the load as shown in Figure Note that the voltage drop across the external PC traces adds to the dropout voltage of the regulator. The SENSE pin bias current is 600 µ A at the rated output voltage. The SENSE pin can be pulled below ground (as in a dual supply system in which the regulator load is returned to a negative supply) and still allow the device to start and operate. Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

(1) PACKAGE THERMAL DATA (1) TL1963A-xx www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 over operating free-air temperature range (unless otherwise noted) IN V to V OUT V to V Input-to-output differential (2) V to V V IN Input voltage range SENSE V to V ADJ V to V SHDN V to V t short Output short-circuit duration Indefinite T lead Maximum lead temperature 10-second soldering time 300 C T J Operating virtual-junction temperature range C to 125 C T stg Storage temperature range C to 150 C (1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) Absolute maximum input-to-output differential voltage cannot be achieved with all combinations of rated IN pin and OUT pin voltages. With the IN pin at the OUT pin may not be pulled below The total measured voltage from IN to OUT cannot exceed PACKAGE BOARD θ JA θ JC θ JP (2) TO-263 (KTT) High JESD 51-5 26.5 C/W 31.8 C/W 0.38 C/W (1) Maximum power dissipation is a function of T J (max), θ JA and T A The maximum allowable power dissipation at any allowable ambient temperature is P D J (max) T A θ JA Operating at the absolute maximum T J of 150 C can affect reliability. (2) For packages with exposed thermal pads, such as QFN, PowerPAD and PowerFLEX θ JP is defined as the thermal resistance between the die junction and the bottom of the exposed pad. Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

(1) TL1963A-xx SLVS719A JUNE 2008 REVISED AUGUST 2008 www.ti.com Over operating temperature range T J C to 125 C (unless otherwise noted) PARAMETER TEST CONDITIONS T J MIN TYP (2) MAX UNIT I LOAD 0.5 A C 1.9 V IN Minimum input voltage (3) (4) V I LOAD 1.5 A Full range 2.1 2.5 V IN 2.21 I LOAD mA C 1.477 1.500 1.523 TL1963A-1.5 V IN 2.5 V to Full range 1.447 1.500 1.545 I LOAD mA to 1.5 A V IN 2.3 I LOAD mA C 1.773 1.800 1.827 TL1963A-1.8 V IN 2.8 V to Full range 1.737 1.800 1.854 I LOAD mA to 1.5 A V OUT Regulated output voltage (5) V V IN I LOAD mA C 2.462 2.500 2.538 TL1963A-2.5 V IN 3.5 V to Full range 2.412 2.500 2.575 I LOAD mA to 1.5 A V IN 3.8 I LOAD mA C 3.250 3.300 3.350 TL1963A-3.3 V IN 4.3 V to Full range 3.200 3.300 3.400 I LOAD mA to 1.5 A V IN 2.21 I LOAD mA C 1.192 1.21 1.228 V ADJ ADJ pin voltage (3) (5) TL1963A V V IN 2.5 V to Full range 1.174 1.21 1.246 I LOAD mA to 1.5 A Δ V IN 2.21 V to TL1963A-1.5 Full range I LOAD mA Δ V IN 2.3 V to TL1963A-1.8 Full range 2.5 I LOAD mA Δ V IN V to Line regulation TL1963A-2.5 Full range mV I LOAD mA Δ V IN 3.8 V to TL1963A-3.3 Full range 3.5 I LOAD mA Δ V IN 2.21 V to TL1963A (3) Full range 1.5 I LOAD mA C V IN 2.5 TL1963A-1.5 Δ I LOAD mA to 1.5 A Full range C V IN 2.8 TL1963A-1.8 Δ I LOAD mA to 1.5 A Full range C 2.5 V IN 3.5 Load regulation TL1963A-2.5 mV Δ I LOAD mA to 1.5 A Full range C V IN 4.3 TL1963A-3.3 Δ I LOAD mA to 1.5 A Full range C V IN 2.5 TL1963A (3) Δ I LOAD mA to 1.5 A Full range (1) The TL1963A-xx regulators are tested and specified under pulse load conditions such that T J T A The TL1963A-xx is fully tested at T A Performance at C and 125 C is specified by design, characterization, and correlation with statistical process controls. (2) Typical values represent the likely parametric nominal values determined at the time of characterization. Typical values depend on the application and configuration and may vary over time. Typical values are not ensured on production material. (3) The TL1963A (adjustable version) is tested and specified for these conditions with the ADJ pin connected to the OUT pin. (4) For the TL1963A, TL1963A-1.5 and TL1963A-1.8, dropout voltages are limited by the minimum input voltage specification under some output voltage/load conditions. (5) Operating conditions are limited by maximum junction temperature. The regulated output voltage specification does not apply for all possible combinations of input voltage and output current. When operating at maximum input voltage, the output current range must be limited. When operating at maximum output current, the input voltage range must be limited. Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 ELECTRICAL CHARACTERISTICS (continued) Over operating temperature range T J C to 125 C (unless otherwise noted) PARAMETER TEST CONDITIONS T J MIN TYP (2) MAX UNIT C 0.02 0.06 I LOAD mA Full range 0.1 C 0.1 0.17 I LOAD 100 mA Full range 0.22 Dropout voltage (4) (6) (7) V DROPOUT V V IN V OUT(NOMINAL) C 0.19 0.27 I LOAD 500 mA Full range 0.35 C 0.34 0.45 I LOAD 1.5 A Full range 0.55 I LOAD mA Full range 1.5 I LOAD mA Full range 1.1 1.6 GND pin current (7) (8) I GND I LOAD 100 mA Full range 3.8 5.5 mA V IN V OUT(NOMINAL) I LOAD 500 mA Full range I LOAD 1.5 A Full range 120 C OUT µ I LOAD 1.5 e N Output voltage noise C µ V RMS B W Hz to 100 kHz I ADJ ADJ pin bias current (3) (9) C µ A V OUT OFF to ON Full range 0.9 Shutdown threshold V V OUT ON to OFF Full range 0.25 0.75 V SHDN V C 0.01 I SHDN SHDN pin current µ A V SHDN V C Quiescent current in V IN V SHDN V C 0.01 µ A shutdown V IN V OUT 1.5 V (avg), V RIPPLE 0.5 V P-P Ripple rejection C dB f RIPPLE 120 Hz, I LOAD 0.75 A V IN V OUT V C I LIMIT Current limit A V IN V OUT(NOMINAL) Full range 1.6 Input reverse leakage I IL V IN V OUT V Full range mA current TL1963A-1.5 V OUT 1.5 V IN 1.5 V C 600 1200 TL1963A-1.8 V OUT 1.8 V IN 1.8 V C 600 1200 I RO Reverse output current (10) TL1963A-2.5 V OUT 2.5 V IN 2.5 V C 600 1200 µ A TL1963A-3.3 V OUT 3.3 V IN 3.3 V C 600 1200 TL1963A V OUT 1.21 V IN 1.21 V C 300 600 (6) Dropout voltage is the minimum input to output voltage differential needed to maintain regulation at a specified output current. In dropout, the output voltage is equal to: V IN V DROPOUT (7) To satisfy requirements for minimum input voltage, the TL1963A (adjustable version) is tested and specified for these conditions with an external resistor divider (two 4.12-k Ω resistors) for an output voltage of 2.4 The external resistor divider adds a 300-mA DC load on the output. (8) GND pin current is tested with V IN OUT(NOMINAL) and a current source load. The GND pin current decreases at higher input voltages. (9) ADJ pin bias current flows into the ADJ pin. (10) Reverse output current is tested with the IN pin grounded and the OUT pin forced to the rated output voltage. This current flows into the OUT pin and out the GND pin. Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

-50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Dropout Voltage – mV IOUT = 1.5 A IOUT = 0.5 A IOUT = 100 mA IOUT = 1 mA 100 150 200 250 300 350 400 450 500 Output Current – A Dropout Voltage – mV TA = 25°C TA = 125°C 0.5 0.6 0.7 0.8 0.9 1.1 1.2 1.3 1.4 1.5 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Quiescent Current – mA VIN = 6 V IOUT = 0 A VSHDN = VIN VOUT Adjustable VOUT Fixed 3.3 V TL1963A (Adjustable) TL1963A-3.3 1.76 1.77 1.78 1.79 1.8 1.81 1.82 1.83 1.84 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Output Voltage – V VOUT Fixed 1.8 V IOUT = 1 mA TL1963A-1.8 I = 1 mAOUT TL1963A-xx SLVS719A JUNE 2008 REVISED AUGUST 2008 www.ti.com DROPOUT VOLTAGE DROPOUT VOLTAGE vs vs OUTPUT CURRENT TEMPERATURE Figure Figure QUIESCENT CURRENT OUTPUT VOLTAGE vs vs TEMPERATURE TEMPERATURE Figure Figure Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

2.42 2.44 2.46 2.48 2.5 2.52 2.54 2.56 2.58 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Output Voltage – V VOUT Fixed 2.5 V IOUT = 1 mA TL1963A-2.5 I = 1 mAOUT 3.22 3.24 3.26 3.28 3.3 3.32 3.34 3.36 3.38 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Output Voltage – V VOUT Fixed 3.3 V IOUT = 1 mA TL1963A-3.3 I = 1 mAOUT 1.19 1.195 1.2 1.205 1.21 1.215 1.22 1.225 1.23 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Output Voltage – V VOUT Adjustable IOUT = 1 mA VIN = 6 V TL1963A (Adjustable) I = 1 mA V = 6 V OUT IN 0.2 0.4 0.6 0.8 1.2 0 2 4 6 8 10 12 14 16 18 20 Input Voltage – V Quiescent Current – mA TJ = 25°C ROUT = 4.3 k VSHDN = VIN VOUT Adjustable /c87 TL1963A (Adjustable) TL1963A-xx www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 TYPICAL CHARACTERISTICS (continued) OUTPUT VOLTAGE OUTPUT VOLTAGE vs vs TEMPERATURE TEMPERATURE Figure Figure OUTPUT VOLTAGE QUIESCENT CURRENT vs vs TEMPERATURE INPUT VOLTAGE Figure Figure Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

Input Voltage – V Ground Current – mA TJ = 25°C VSHDN = VIN VOUT Adjustable VOUT = 1.21 V IOUT = 1.5 A IOUT = 1 A IOUT = 0.5 A TL1963A (Adjustable) 0 1 2 3 4 5 6 7 8 9 10 Input Voltage – V Ground Current – mA TJ = 25°C VSHDN = VIN VOUT Adjustable VOUT = 1.21 V IOUT = 300 mA IOUT = 100 mA IOUT = 10 mA TL1963A (Adjustable) 0 1 2 3 4 5 6 7 8 9 10 Input Voltage – V Ground Current – mA TJ = 25°C VSHDN = VIN VOUT Fixed 3.3 V IOUT = 300 mA IOUT = 100 mA IOUT = 10 mA TL1963A-3.3 100 120 0 1 2 3 4 5 6 7 8 9 10 Input Voltage – V Ground Current – mA TJ = 25°C VSHDN = VIN VOUT Fixed 3.3 V IOUT = 1.5 A IOUT = 1 A IOUT = 0.5 A TL1963A-3.3 TL1963A-xx SLVS719A JUNE 2008 REVISED AUGUST 2008 www.ti.com TYPICAL CHARACTERISTICS (continued) GROUND CURRENT GROUND CURRENT vs vs INPUT VOLTAGE INPUT VOLTAGE Figure Figure 10. GROUND CURRENT GROUND CURRENT vs vs INPUT VOLTAGE INPUT VOLTAGE Figure 11. Figure 12. Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

0.25 0.5 0.75 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C SHDN Input Current – µA VSHDN = 0 V Output Current – A Ground Current – mA VIN = VOUT(nom) + 1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C SHDN Input Voltage – V IOUT = 1 mA 0.25 0.5 0.75 1.25 1.5 1.75 2.25 2.5 0 2 4 6 8 10 12 14 16 18 20 SHDN Input Voltage – V SHDN Input Current – µA TL1963A-xx www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 TYPICAL CHARACTERISTICS (continued) GROUND CURRENT SHDN INPUT CURRENT vs vs OUTPUT CURRENT TEMPERATURE Figure 13. Figure 14. SHDN INPUT CURRENT SHDN THRESHOLD (OFF TO ON) vs vs SHDN INPUT VOLTAGE TEMPERATURE Figure 15. Figure 16. Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

0.5 1.5 2.5 3.5 4.5 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C ADJ Bias Current – µA 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C SHDN Input Voltage – V IOUT = 1 mA 0.5 1.5 2.5 3.5 0 2 4 6 8 10 12 14 16 18 20 Input/Output Differential Voltage – V Current Limit – A ?VOUT = 100 mV TA = -40°C TA = 25°C TA = 125°C /c68 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Current Limit – A VIN = 7 V VOUT = 0 V TL1963A-xx SLVS719A JUNE 2008 REVISED AUGUST 2008 www.ti.com TYPICAL CHARACTERISTICS (continued) SHDN THRESHOLD (ON TO OFF) ADJ BIAS CURRENT vs vs TEMPERATURE TEMPERATURE Figure 17. Figure 18. CURRENT LIMIT CURRENT LIMIT vs vs INPUT/OUTPUT DIFFERENTIAL VOLTAGE TEMPERATURE Figure 19. Figure 20. Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

Output Voltage – V Reverse Output Current – mA TJ = 25°C VIN = 0 V Current flows into OUT pin VOUT Adjustable VOUT = VADJ VOUT Fixed 3.3 V VOUT = VFB TL1963A (Adjustable) V = VOUT ADJ TL1963A-3.3 V = VOUT FB 200 400 600 800 1000 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Reverse Output Current – µA VIN = 0 V VOUT Adjustable VOUT = 1.21 V VOUT Fixed 3.3V VOUT = 3.3 V TL1963A (Adjustable) V = 1.21 VOUT TL1963A-3.3 V = 3.3 VOUT -35 -30 -25 -20 -15 -10 -50 -25 0 25 50 75 100 125 TA – Free-Air Temperature – °C Load Regulation – mV VOUT Adjustable VOUT Fixed 3.3 V IOUT = 1.5 A VOUT Fixed 2.5 V VOUT Fixed 1.8 V TL1963A (Adjustable) TL1963A-3.3 TL1963A-2.5 TL1963A-1.8 10 100 1000 10000 100000 100000 Frequency – Hz Ripple Rejection – dBVIN = 2.7 V CIN = 0 COUT = 10 µF IOUT = 750 mA VRipple = 0.05 Vpp 10 100 1k 10k 100k 1M V = 2.7 V C = 0 C = 10 µF (ceramic) I = 750 mA V = 0.05 V T = 25°C IN IN OUT OUT Ripple PP A TL1963A-xx www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 TYPICAL CHARACTERISTICS (continued) REVERSE OUTPUT CURRENT REVERSE OUTPUT CURRENT vs vs OUTPUT VOLTAGE TEMPERATURE Figure 21. Figure 22. RIPPLE REJECTION LOAD REGULATION vs vs FREQUENCY TEMPERATURE Figure 23. Figure 24. Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

500 µs per division 500 mA 10 mA 20 mV 0 mV -20 mV Load Current Change in Outupt Voltage VIN = 4.3 V CIN = 10 µF COUT = 10 µF VOUT IOUT V = 4.3 V C = 10 µF C = 10 µF (ceramic) IN IN OUT 10 100 1k 10k 100k 0.01 0.1 Frequency - Hz Output Noise Voltage – µV RMS COUT = 10 µF IOUT = 1.5 A VOUT Adjustable VOUT Fixed 3.3 V TL1963A (Adjustable) TL1963A-3.3 C = 10 µF (ceramic) I = 1.5 A OUT OUT 500 µs per division VIN = 4.3 V CIN = 10 µF COUT = 10 µF 1.5 A 10 mA 20 mV 0 mV -20 mV Load Current Change in Outupt Voltage VOUT IOUT V = 4.3 V C = 10 µF C = 10 µF (ceramic) IN IN OUT TL1963A-xx SLVS719A JUNE 2008 REVISED AUGUST 2008 www.ti.com TYPICAL CHARACTERISTICS (continued) OUTPUT NOISE VOLTAGE vs FREQUENCY LOAD TRANSIENT RESPONSE Figure 25. Figure 26. LOAD TRANSIENT RESPONSE Figure 27. Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

5.3 V 4.3 V IOUT = 1.5 A CIN = 10 µF COUT = 10 µF 5 mV -5 mV VIN VOUT Change in Output Voltage Input Voltage I = 1.5 A C = 10 µF C = 10 µF (ceramic) OUT IN OUT TL1963A-xx www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 TYPICAL CHARACTERISTICS (continued) LINE TRANSIENT RESPONSE Figure 28. Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

VIN > 3 V 2.5 V at 1.5 A SHDN TL1963A-2.510 µF (ceramic) 10 µF (ceramic) +C1 10 µF 80.6k 2.2k 0.01k 2.2k TL1963A-1.8 SHDN OUT SENSE 100k LOAD 470k 1 µF 3.3 µF IN GND V > 2.7 VIN TL1963A-xx SLVS719A JUNE 2008 REVISED AUGUST 2008 www.ti.com The TL1963A-xx series are 1.5-A LDO regulators optimized for fast transient response. The devices are capable of supplying 1.5 A at a dropout voltage of 340 mV. The low operating quiescent current mA) drops to less than µ A in shutdown. In addition to the low quiescent current, the TL1963A-xx regulators incorporate several protection systems. The devices are protected against both reverse input and reverse output voltages. In battery-backup a backup battery when the input is pulled to ground, the TL1963A-xx acts as if it has a diode in series with its output and prevents reverse current flow. Additionally, in dual-supply a negative supply, the output can be pulled below ground by as much as V and still allow the device to start and operate. Figure 29. 3.3 V to 2.5 V Regulator NOTE: All capacitors are ceramic. Figure 30. Adjustable Current Source Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

TL1963A-3.3 SHDN OUT SENSE SHDN OUT 0.01k 0.01k 2.2k 2.2k 6.65k 4.12k 22 µF SHDN

3.3 V at 3 A

V > 3.7 VIN C1 10 µF 0.01 µF TL1963A IN SENSE GND IN OUT SENSE GND SHDN TL1963A LoadVIN R P R P Adjustable Operation TL1963A-xx www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 NOTE: All capacitors are ceramic. Figure 31. Paralleling Regulators for Higher Output Current Figure 32. Kelvin Sense Connection The adjustable version of the TL1963A has an output voltage range of 1.21 V to The output voltage is set by the ratio of two external resistors as shown in Figure The device maintains the voltage at the ADJ pin at 1.21 V referenced to ground. The current in is then equal to 1.21 V R1, and the current in is the current in plus the ADJ pin bias current. The ADJ pin bias current, µ A at flows through into the ADJ pin. The output voltage can be calculated using the formula shown in Figure The value of should be less than 4.17 k Ω to minimize errors in the output voltage caused by the ADJ pin bias current. Note that in shutdown the output is turned off, and the divider current is zero. Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

V = 1.21 VOUT 1 R2 ) (IADJ)(R2) V = 1.21 VADJ I = 3 µA at 25°CADJ Output range = 1.21 V to 20 V + +) Output Capacitance and Transient Response Overload Recovery TL1963A-xx SLVS719A JUNE 2008 REVISED AUGUST 2008 www.ti.com Figure 33. Adjustable Operation The adjustable device is tested and specified with the ADJ pin tied to the OUT pin for an output voltage of 1.21 Specifications for output voltages greater than 1.21 V are proportional to the ratio of the desired output voltage to 1.21 V OUT /1.21 For example, load regulation for an output current change of mA to 1.5 A is mV (typ) at V OUT 1.21 At V OUT load regulation is: V/1.21 V)( mV) 12.4 mV The TL1963A-xx regulators are designed to be stable with a wide range of output capacitors. The ESR of the output capacitor affects stability, most notably with small capacitors. A minimum output capacitor of µ F with an ESR of Ω or less is recommended to prevent oscillations. Larger values of output capacitance can decrease the peak deviations and provide improved transient response for larger load current changes. Bypass capacitors, used to decouple individual components powered by the TL1963A-xx, increase the effective output capacitor value. Extra consideration must be given to the use of ceramic capacitors. Ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior over temperature and applied voltage. The most common dielectrics used are Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics are good for providing high capacitances in a small package, but exhibit strong voltage and temperature coefficients. When used with a 5-V regulator, a 10- µ F Y5V capacitor can exhibit an effective value as low as µ F to µ F over the operating temperature range. The X5R and X7R dielectrics result in more stable characteristics and are more suitable for use as the output capacitor. The X7R type has better stability across temperature, while the X5R is less expensive and is available in higher values. Voltage and temperature coefficients are not the only sources of problems. Some ceramic capacitors have a piezoelectric response. A piezoelectric device generates voltage across its terminals due to mechanical stress, similar to the way a piezoelectric accelerometer or microphone works. For a ceramic capacitor the stress can be induced by vibrations in the system or thermal transients. Like many IC power regulators, the TL1963A-xx has safe operating area protection. The safe area protection decreases the current limit as input-to-output voltage increases and keeps the power transistor inside a safe operating region for all values of input-to-output voltage. The protection is designed to provide some output current at all values of input-to-output voltage up to the device breakdown. When power is first turned on, as the input voltage rises, the output follows the input, allowing the regulator to start up into very heavy loads. During start up, as the input voltage is rising, the input-to-output voltage differential is small, allowing the regulator to supply large output currents. With a high input voltage, a problem can occur wherein removal of an output short does not allow the output voltage to recover. Other regulators also exhibit this phenomenon, so it is not unique to the TL1963A-xx. Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 The problem occurs with a heavy output load when the input voltage is high and the output voltage is low. Common situations are immediately after the removal of a short circuit or when the shutdown pin is pulled high after the input voltage has already been turned on. The load line for such a load may intersect the output current curve at two points. If this happens, there are two stable output operating points for the regulator. With this double intersection, the input power supply may need to be cycled down to zero and brought up again to make the output recover. The TL1963A-xx regulators have been designed to provide low output voltage noise over the 10-Hz to 100-kHz bandwidth while operating at full load. Output voltage noise is typically nV/ Hz over this frequency bandwidth for the TL1963A (adjustable version). For higher output voltages (generated by using a resistor divider), the output voltage noise is gained up accordingly. This results in RMS noise over the 10-Hz to 100-kHz bandwidth of µ V RMS for the TL1963A, increasing to µ V RMS for the TL1963A-3.3. Higher values of output voltage noise may be measured when care is not exercised with regards to circuit layout and testing. Crosstalk from nearby traces can induce unwanted noise onto the output of the TL1963A-xx. Power-supply ripple rejection must also be considered; the TL1963A-xx regulators do not have unlimited power-supply rejection and pass a small portion of the input noise through to the output. The power handling capability of the device is limited by the maximum rated junction temperature (125 C). The power dissipated by the device is made up of two components: Output current multiplied by the input/output voltage differential: I OUT IN V OUT GND pin current multiplied by the input voltage: I GND V IN The GND pin current can be found using the GND Pin Current graphs in Typical Characteristics Power dissipation is equal to the sum of the two components listed above. The TL1963A-xx series regulators have internal thermal limiting designed to protect the device during overload conditions. For continuous normal conditions, the maximum junction temperature rating of 125 C must not be exceeded. It is important to give careful consideration to all sources of thermal resistance from junction to ambient. Additional heat sources mounted nearby must also be considered. For surface-mount devices, heat sinking is accomplished by using the heat-spreading capabilities of the PC board and its copper traces. Copper board stiffeners and plated through-holes also can be used to spread the heat generated by power devices. Table lists thermal resistance for several different board sizes and copper areas. All measurements were taken in still air on 1/16-inch FR-4 board with one-ounce copper. Table KTT Package (5-Pin TO-263) COPPER AREA THERMAL RESISTANCE BOARD AREA (JUNCTION TO AMBIENT) TOPSIDE (1) BACKSIDE 2500 mm 2500 mm 2500 mm C/W 1000 mm 2500 mm 2500 mm C/W 125 mm 2500 mm 2500 mm C/W (1) Device is mounted on topside. Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

www.ti.com Example: Given an output voltage of 3.3 an input voltage range of V to an output current range of mA to 500 mA, and a maximum ambient temperature of what is the maximum junction temperature? The power dissipated by the device is equal to: I OUT(MAX) IN(MAX) V OUT I GND IN(MAX) where, I OUT(MAX) 500 mA V IN(MAX) V I GND at OUT 500 mA, V IN mA So, P 500 mA V 3.3 mA 1.41 W Using a KTT package, the thermal resistance is in the range of C/W to C/W, depending on the copper area. So the junction temperature rise above ambient is approximately equal to: 1.41 W C/W 39.5 C The maximum junction temperature is then be equal to the maximum junction-temperature rise above ambient plus the maximum ambient temperature or: T JMAX C 39.5 C 89.5 C The TL1963A-xx regulators incorporate several protection circuits. In addition to the normal protection regulators, such as current limiting and thermal limiting, the devices are protected against reverse input voltages, reverse output voltages and reverse voltages from output to input. Current limit protection and thermal overload protection are intended to protect the device against current overload conditions at the output of the device. For normal operation, the junction temperature should not exceed 125 The input of the device withstands reverse voltages of Current flow into the device is limited to less than mA (typically less than 100 µ A), and no negative voltage appears at the output. The device protects both itself and the load. This provides protection against batteries that can be plugged in backward. The output of the TL1963A-xx can be pulled below ground without damaging the device. If the input is left open circuit or grounded, the output can be pulled below ground by For fixed voltage versions, the output acts like a large resistor, typically k Ω or higher, limiting current flow to typically less than 600 µ For adjustable versions, the output acts like an open circuit; no current flows out of the pin. If the input is powered by a voltage source, the output sources the short-circuit current of the device and protects itself by thermal limiting. In this case, grounding the SHDN pin turns off the device and stops the output from sourcing the short-circuit current. The ADJ pin of the adjustable device can be pulled above or below ground by as much as V without damaging the device. If the input is left open circuit or grounded, the ADJ pin acts like an open circuit when pulled below ground and like a large resistor (typically k Ω in series with a diode when pulled above ground. In situations where the ADJ pin is connected to a resistor divider that would pull the ADJ pin above its 7-V clamp voltage if the output is pulled high, the ADJ pin input current must be limited to less than mA. For example, a resistor divider is used to provide a regulated 1.5-V output from the 1.21-V reference when the output is forced to The top resistor of the resistor divider must be chosen to limit the current into the ADJ pin to less than mA when the ADJ pin is at The 13-V difference between OUT and ADJ pins divided by the 5-mA maximum current into the ADJ pin yields a minimum top resistor value of 2.6 k Ω In circuits where a backup battery is required, several different input/output conditions can occur. The output voltage may be held up while the input is either pulled to ground, pulled to some intermediate voltage, or is left open circuit. Submit Documentation Feedback Copyright 2008, Texas Instruments Incorporated

www.ti.com SLVS719A JUNE 2008 REVISED AUGUST 2008 When the IN pin of the TL1963A-xx is forced below the OUT pin or the OUT pin is pulled above the IN pin, input current typically drops to less than µ This can happen if the input of the device is connected to a discharged (low voltage) battery and the output is held up by either a backup battery or a second regulator circuit. The state of the SHDN pin has no effect on the reverse output current when the output is pulled above the input. Copyright 2008, Texas Instruments Incorporated Submit Documentation Feedback

Orderable Device Status(1) Package Type Package Drawing Pins Package Qty Eco Plan(2) Lead/Ball FinishMSL Peak Temp (3) TL1963A-15KTTR ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR TL1963A-15KTTRG3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR TL1963A-15KTTT PREVIEW DDPAK/ TO-263 KTT 5 TBD Call TI Call TI TL1963A-18KTTR ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR TL1963A-18KTTRG3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR TL1963A-18KTTT PREVIEW DDPAK/ TO-263 KTT 5 TBD Call TI Call TI TL1963A-25KTTR ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR TL1963A-25KTTRG3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR TL1963A-25KTTT PREVIEW DDPAK/ TO-263 KTT 5 TBD Call TI Call TI TL1963A-33KTTR ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR TL1963A-33KTTT PREVIEW DDPAK/ TO-263 KTT 5 TBD Call TI Call TI TL1963AKTTR ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR TL1963AKTTRG3 ACTIVE DDPAK/ TO-263 KTT 5 500 Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HR (1)The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2)Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontentfor the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS):TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt):This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br):TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on PACKAGE OPTION ADDENDUM www.ti.com 25-Sep-2008 Addendum-Page 1

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. PACKAGE OPTION ADDENDUM www.ti.com 25-Sep-2008 Addendum-Page 2

*All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W (mm) Pin1 Quadrant TL1963A-15KTTR DDPAK/ TO-263 TL1963A-18KTTR DDPAK/ TO-263 TL1963A-25KTTR DDPAK/ TO-263 TL1963A-33KTTR DDPAK/ TO-263 TL1963AKTTR DDPAK/ TO-263 PACKAGE MATERIALS INFORMATION www.ti.com 23-Jul-2008 Pack Materials-Page 1

*All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TL1963A-15KTTR DDPAK/TO-263 KTT 5 500 340.0 340.0 38.0 TL1963A-18KTTR DDPAK/TO-263 KTT 5 500 340.0 340.0 38.0 TL1963A-25KTTR DDPAK/TO-263 KTT 5 500 340.0 340.0 38.0 TL1963A-33KTTR DDPAK/TO-263 KTT 5 500 340.0 340.0 38.0 TL1963AKTTR DDPAK/TO-263 KTT 5 500 340.0 340.0 38.0 PACKAGE MATERIALS INFORMATION www.ti.com 23-Jul-2008 Pack Materials-Page 2

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Summary

1.5-A LOW-NOISE FAST-TRANSIENT-RESPONSE LOW-DROPOUT REGULATOR

Description

1.5-A LOW-NOISE FAST-TRANSIENT-RESPONSE LOW-DROPOUT REGULATOR

Source title TL1963A-18KTTT Datasheet(PDF) - Texas Instruments

Read TL1963A-18KTTT online.