Datasheet
Table Of Contents
1
3
2
GND
IN
SHDN
SENSE/ADJ
OUT
5
4
KTT PACKAGE
(TOP VIEW)
DCQ PACKAGE
(TOP VIEW)
1
3
2
GND
IN
SHDN
SENSE/ADJ
OUT
5
4
GND
6
TPS7A45xx
www.ti.com
SLVS720D –JUNE 2008–REVISED AUGUST 2011
LOW-NOISE FAST-TRANSIENT-RESPONSE 1.5-A LOW-DROPOUT VOLTAGE
REGULATORS
Check for Samples: TPS7A45xx
1
FEATURES
DESCRIPTION
• Optimized for Fast Transient Response
The TPS7A45xx devices are low-dropout (LDO)
• Output Current: 1.5 A
regulators optimized for fast transient response. The
• High Output Voltage Accuracy : 1% at 25°C
device can supply 1.5 A of output current with a
dropout voltage of 300 mV. Operating quiescent
• Dropout Voltage: 300 mV
current is 1 mA, dropping to less than 1 μA in
• Low Noise: 35 μV
RMS
(10 Hz to 100 kHz)
shutdown. Quiescent current is well controlled; it does
• High Ripple Rejection: 68 dB at 1KHz
not rise in dropout, as with many other regulators. In
addition to fast transient response, the TPS7A45xx
• 1-mA Quiescent Current
regulators have very low output noise, which makes
• No Protection Diodes Needed
them ideal for sensitive RF supply applications.
• Controlled Quiescent Current in Dropout
Output voltage range is from 1.21 V to 20 V. The
• Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V
TPS7A45xx regulators are stable with output
• Adjustable Output from 1.21 V to 20 V
capacitance as low as 10 μF. Small ceramic
capacitors can be used without the necessary
• Less Than 1-μA Quiescent Current in
addition of ESR, as is common with other regulators.
Shutdown
Internal protection circuitry includes reverse-battery
• Stable with 10-μF Ceramic Output Capacitor
protection, current limiting, thermal limiting, and
• Reverse-Battery Protection
reverse-current protection. The devices are available
in fixed output voltages of 1.5 V, 1.8 V, 2.5 V, 3.3 V,
• Reverse Current Protection
and as an adjustable device with a 1.21-V reference
voltage. The TPS7A45xx regulators are available in
APPLICATIONS
the 5-pin TO-263 (KTT) and 6-pin TO-223 (DCQ)
• Industrial
packages.
• Wireless Infrastructure
• Radio-Frequency Systems
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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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.