TL1963A-xx
www.ti.com........................................................................................................................................................ SLVS719E –JUNE 2008–REVISED AUGUST 2009
1.5-A LOW-NOISE FAST-TRANSIENT-RESPONSE LOW-DROPOUT REGULATOR
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FEATURES
DCQ PACKAGE
(TOP VIEW)
2
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Optimized for Fast Transient Response
Output Current: 1.5 A
5
4
3
2
1
SENSE/ADJ
OUT
Dropout Voltage: 340 mV
6
GND
Low Noise: 40 μVRMS (10 Hz to 100 kHz)
1-mA Quiescent Current
IN
SHDN
No Protection Diodes Needed
Controlled Quiescent Current in Dropout
DCY PACKAGE
(TOP VIEW)
Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V,
and 3.3 V
3
OUT
GND
IN
4
2
1
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Adjustable Output Voltage: 1.21 V to 20 V
Less Than 1-μA Quiescent Current in
Shutdown
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Stable with 10-μF Output Capacitor
Stable with Ceramic Capacitors
Reverse-Battery Protection
No Reverse Current
KTT PACKAGE
(TOP VIEW)
SENSE/ADJ
5
4
3
2
1
OUT
GND
IN
Thermal Limiting
SHDN
APPLICATIONS
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3.3-V to 2.5-V Logic Power Supplies
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Post Regulator for Switching Supplies
DESCRIPTION/ORDERING INFORMATION
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 1 mA, dropping to less
than 1 μA 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 20 V. The TL1963A-xx regulators are stable with output capacitors as low
as 10 μF. 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 V, 1.8 V, 2.5 V, and 3.3 V,
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), 6-pin TO-223 (DCQ), and 3-pin SOT-223 (DCY) packages.
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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PowerPAD, PowerFLEX are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2009, Texas Instruments Incorporated