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TL1963A-XX_10 Datasheet, PDF (1/28 Pages) Texas Instruments – 1.5-A LOW-NOISE FAST-TRANSIENT-RESPONSE LOW-DROPOUT REGULATOR
TL1963A-xx
www.ti.com........................................................................................................................................................ SLVS719E – JUNE 2008 – REVISED AUGUST 2009
1.5-A LOW-NOISE FAST-TRANSIENT-RESPONSE LOW-DROPOUT REGULATOR
FEATURES
1
•2 Optimized for Fast Transient Response
• Output Current: 1.5 A
• Dropout Voltage: 340 mV
• Low Noise: 40 μVRMS (10 Hz to 100 kHz)
• 1-mA Quiescent Current
• 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
• Adjustable Output Voltage: 1.21 V to 20 V
• Less Than 1-μA Quiescent Current in
Shutdown
• Stable with 10-μF Output Capacitor
• Stable with Ceramic Capacitors
• Reverse-Battery Protection
• No Reverse Current
• Thermal Limiting
APPLICATIONS
• 3.3-V to 2.5-V Logic Power Supplies
• Post Regulator for Switching Supplies
DCQ PACKAGE
(TOP VIEW)
5 SENSE/ADJ
4 OUT
6
3 GND
2 IN
1 SHDN
DCY PACKAGE
(TOP VIEW)
3 OUT
4
2 GND
1 IN
KTT PACKAGE
(TOP VIEW)
5
SENSE/ADJ
4
OUT
3
GND
2
IN
1
SHDN
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.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD, PowerFLEX are trademarks of Texas Instruments.
2
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
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