ZLDO270 Ver la hoja de datos (PDF) - Zetex => Diodes

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ZLDO270

2.70 VOLT ULTRA LOW DROPOUT REGULATOR

Zetex => Diodes 

ZLDO270

APPLICATIONS

5). Logic Controlled Power Supply

Fig.4 shows all that is necessary to allow a

microprocessor to control a power supply based

on the ZLDO270. The Shutdown Control pin (pin

2), is a logic compatible input that disables the

regulator when a voltage in excess of 1.5V is

applied. The current required to drive this input

is less than 10µA. When the regulator is

shutdown in this way, the quiescent current of

the ZLDO270 falls to around 11µA. This makes

the regulator suitable for a wide range of battery

powered applications where intermittent

operation occurs. The shutdown control pin

should not be taken to a voltage higher than Vin

if low quiescent supply current is important. The

shutdown control is a high impedance input and

so if not required, should be wired to the ground

pin (pin 7).

+5.0V

to 20V

Vin Vout

IC1 Gnd

ZSR330

Microproc.

System

Supply Input

IC2

ZLDO270

LBF Spg

SC Gnd

Vin D/C

N/C Vout

C3

100nF

0V

Figure 4

C1

10pF

+2.70V

C2 Switched

1µF Output

0V

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