ZLDO300 查看數據表（PDF） - Zetex => Diodes

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ZLDO300

3.0 VOLT ULTRA LOW DROPOUT REGULATOR

Zetex => Diodes 

ZLDO300

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 ZLDO300. 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 10uA. When the regulator

is shutdown in this way, the quiescent current

of the ZLDO300 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

ZLDO300

LBF Spg

SC Gnd

Vin D/C

N/C Vout

C3

100nF

0V

Figure 4

C1

10pF

+3.0V

C2 Switched

1µF Output

0V

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