TLV1171xxDCY

VOUT

VIN

2

3

1

GND

TLV1171

www.ti.com

SBVS177 – APRIL 2012

1-A, Positive Fixed-Voltage, Low-Dropout Regulator

1

FEATURES

DESCRIPTION

The TLV1171 low-dropout (LDO) linear regulator is a

2

•

Accuracy: 1.5% (typ)

low input voltage version of the popular 1117 voltage

•

regulator.

–

500x Lower Than Standard 1117 Devices

The TLV1171 is an extremely low-power device that

•

consumes 500x lower quiescent current than the

–

traditional

1117

voltage

regulator,

making

the

TLV1171 suitable for applications that mandate very

•

Stable with 0-mA Output Current

low standby current. The TLV1171 LDO is also stable

•

with 0 mA of load current; there is no minimum load

•

High PSRR: 65 dB at 1 kHz

requirement, making the device an ideal choice for

applications where the regulator is required to power

•

Minimum Ensured Current Limit: 1.1 A

very small loads during standby in addition to large

•

Stable with Cost-Effective Ceramic Capacitors:

currents on the order of 1 A during normal operation.

–

With 0-

Ω ESR

The TLV1171 offers excellent line and load transient

performance, resulting in very small magnitude output

•

Temperature Range: –40°C to +125°C

voltage undershoots and overshoots when the load

•

Thermal Shutdown and Overcurrent Protection

current requirement changes from less than 1 mA to

•

Available Package: SOT223

more than 500 mA.

–

See the Package Option Addendum at the

A precision band gap and error amplifier provides

end of this document for a complete list of

1.5% accuracy. A very high power-supply rejection

available voltage options.

ratio enables the device to be used for post-

regulation after a switching regulator. Other valuable

APPLICATIONS

features include low output noise and low-dropout

voltage.

•

Set Top Boxes

The device is internally compensated to be stable

•

TVs and Monitors

with

0-

Ω

equivalent

series

resistance

(ESR)

•

PC Peripherals, Notebooks, and Motherboards

capacitors. These key advantages enable the use of

•

Modems and Other Communication Products

cost-effective, small-size ceramic capacitors. Cost-

effective capacitors that have higher bias voltages

•

Switching Power-Supply Post-Regulation

and temperature derating can also be used if desired.

The TLV1171 is available in a SOT223 package. For

alternate pin outs of the device, refer to the

TLV1117LV.

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.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012, 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.