1 Features

1? 50-mA Low-Dropout Regulator

? Ultra-Low 1.2-μA Quiescent Current at 10 mA

? 5-Pin SC70 (DCK) Package

? Integrated Power Good Output

? Stable With Any Capacitor Greater Than 0.47 μF

? Typical Dropout Voltage of 105 mV at 10 mA

(TPS79733)

? Over-Current Limitation

? Operating Junction Temperature Range of –40°C

to 85°C

2 Applications

? Battery-Powered Microcontrollers and

Microprocessors

3 Description

The TPS797xx family of low-dropout voltage

regulators (LDOs) offers the benefits of low-dropout

voltage and ultra-low-power operation. The device is

stable with any capacitor greater than 0.47-μF.

Therefore, implementations of this device require very

little board space due to the miniaturized packaging

and potentially small output capacitor. In addition, the

family includes an integrated open drain active-high

power good (PG) output. Intended for use in

microcontroller-based, battery-powered applications,

the TPS797xx family low dropout and ultra-low-power

operation result in a significant increase in system

battery operating life. The small packaging minimizes

consumption of board space.

The device is enabled when the applied voltage

exceeds the minimum input voltage. The usual PNP

pass transistor has been replaced by a PMOS pass

element. Because the PMOS pass element behaves

as a low-value resistor, the dropout voltage is very

low (typically, 105 mV at 10-mA of load current), and

is directly proportional to the load current. The

quiescent current is ultra-low (1.2-μA, typically) and is

stable over the entire range of output load current

(0 mA to 50 mA). When properly configured with a

pullup resistor, the PG output can implement a

power-on reset or low-battery indicator.