TL1963A-xx
www.ti.com ........................................................................................................................................................ SLVS719A–JUNE 2008–REVISED AUGUST 2008
1.5-A LOW-NOISE FAST-TRANSIENT-RESPONSE LOW-DROPOUT REGULATOR
1
FEATURES
2
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Optimized for Fast Transient Response
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Reverse-Battery Protection
No Reverse Current
Thermal Limiting
Output Current: 1.5 A
Dropout Voltage: 340 mV
Low Noise: 40 µVRMS (10 Hz to 100 kHz)
1-mA Quiescent Current
APPLICATIONS
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3.3-V to 2.5-V Logic Power Supplies
Post Regulator for Switching Supplies
No Protection Diodes Needed
Controlled Quiescent Current in Dropout
Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V,
and 3.3 V
KTT PACKAGE
(TOP VIEW)
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Adjustable Output Voltage: 1.21 V to 20 V
SENSE/ADJ
OUT
5
4
3
2
1
Less Than 1-µA Quiescent Current in
Shutdown
GND
IN
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Stable with 10-µF Output Capacitor
SHDN
Stable with Ceramic Capacitors
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) package.
ORDERING INFORMATION(1)
VOUT
TA
PACKAGE(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
TL1963A-15
(TYP)
1.5 V
1.8 V
2.5 V
3.3 V
ADJ
TL1963A-15KTTR
TL1963A-18KTTR
TL1963A-25KTTR
TL1963A-33KTTR
TL1963AKTTR
TL1963A-18
TL1963A-25
TL1963A-33
TL1963A
–40°C to 125°C
TO-263 (KTT)
Reel of 500
(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.
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
PowerPAD, PowerFLEX are trademarks of Texas Instruments.
UNLESS OTHERWISE NOTED this document contains
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.
Copyright © 2008, Texas Instruments Incorporated