TPS79718Q1

TPS79730Q1

TPS79733Q1

SGLS264A − SEPTEMBER 2004 − REVISED JUNE 2008

8

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APPLICATION INFORMATION

The TPS797xx family of low-dropout (LDO) regulators have been optimized for use in micropower applications.

They feature extremely low dropout voltages and ultralow quiescent current (1.2

µA typically).

A typical application circuit is shown in Figure 14.

C1

0.1

µF

PG

OUT

4

3

IN

NC

GND

2

1

5

VO

0.47

µF

+

TPS797xx

100 k

Ω

+

−

Figure 14. Typical Application Circuit

external capacitor requirements

Although not required, a 0.1-

µF or larger input bypass capacitor, connected between IN and GND and located

close to the TPS797xx, is recommended, especially when a highly resistive power supply is powering the LDO

in addition to other devices.

Like all low-dropout regulators, the TPS797xx requires an output capacitor connected between OUT and GND

to stabilize the internal control loop. The minimum recommended capacitance is 0.47

µF. Any 0.47-µF capacitor

is suitable. Capacitor values larger than 0.47

µF are acceptable.