1

FEATURES

DESCRIPTION

APPLICATIONS

IN

IN

EN

GND

OUT

OUT

RESET/

PG

6

7

5

16

14

13

3

+

10 F

m

C

OUT

(1)

RESET/PG

V

OUT

V

IN

0.1 F

m

TPS775xx, TPS776xx

TPS775xx with RESET Output, TPS776xx with PG Output

FAST-TRANSIENT-RESPONSE 500mA LOW-DROPOUT VOLTAGE REGULATORS

23

• Open Drain Power-On Reset with 200ms Delay

The TPS775xx and TPS776xx devices are designed

(TPS775xx)

to have a fast transient response and be stable with a

10

µF low ESR capacitor. This combination provides

• Open Drain Power Good (TPS776xx)

high performance at a reasonable cost.

• 500mA Low-Dropout Voltage Regulator

Because the PMOS device behaves as a low-value

• Available in Fixed Output and Adjustable

resistor, the dropout voltage is very low (typically

Versions

169mV at an output current of 500mA for the

• Dropout Voltage to 169mV (Typ) at 500mA

TPS77x33) and is directly proportional to the output

(TPS77x33)

current. Additionally, since the PMOS pass element is

a voltage-driven device, the quiescent current is very

• Ultralow 85µA Typical Quiescent Current

low and independent of output loading (typically 85

µA

• Fast Transient Response

over the full range of output current, 0mA to 500mA).

• 2% Tolerance Over Specified Conditions for

These two key specifications yield a significant

Fixed-Output Versions

improvement in operating life for battery-powered

systems. This LDO family also features a sleep

• 8-Pin SOIC and 20-Pin TSSOP PowerPAD™

mode; applying a TTL high signal to EN (enable)

(PWP) Packages

shuts down the regulator, reducing the quiescent

• Thermal Shutdown Protection

current to 1

µA at T

The RESET output of the TPS775xx initiates a reset

in microcomputer and microprocessor systems in the

• FPGA Power

event of an undervoltage condition. An internal

• DSP Core and I/O Voltages

comparator in the TPS775xx monitors the output

voltage of the regulator to detect an undervoltage

Typical Application Circuit

condition on the regulated output voltage.

(Fixed Voltage Options)

Power good (PG) of the TPS776xx is an active high

output, which can be used to implement a power-on

reset or a low-battery indicator.

The TPS775xx and TPS776xx are offered in 1.5V,

1.6V (TPS77516 only), 1.8V, 2.5V, 2.8V (TPS77628

only), and 3.3V fixed-voltage versions and in an

adjustable version (programmable over the range of

1.5V to 5.5V for the TPS77501 and 1.2V to 5.5V for

the TPS77601). Output voltage tolerance is specified

as a maximum of 2% over line, load, and temperature

ranges. The TPS775xx and TPS776xx families are

available in 8-pin SOIC and 20-pin TSSOP 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.

2

PowerPAD is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 1999–2009, 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.