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ZLDO500

5.0 VOLT ULTRA LOW DROPOUT REGULATOR

Diodes Incorporated. 

ZLDO500

APPLICATIONS

ZLDO500 devices, the parts can be damaged

by sustained output shorts or excessive loads

when combined with high input supply

voltages. To ensure reliable operation, keep

loads within the SOA graph boundaries

Indicated in the typical characteristics.

5). Low Battery Flag

The ZLDO500 provides an output called Low

Battery Flag (LBF). Unlike many regulators

that only signal that they are falling out of

regulation, the LBF output of the ZLDO500

series indicates that the voltage drop across

the regulator has fallen to less than typically

300mV and so supply failure is imminent.

This improved warning gives both more time

for the system supplied to shutdown

gracefully and maintains regulation while

this happens. This could be a vital point if

measurements are under way and must be

6V

Figure 4

ZLDO500

LBF Spg

SC Gnd

Vin D/C

N/C Vout

C3

100nF

C1

10pF

+ 5V

R1

100k

C2

1uF

Microproc.

System

Interrupt

Input

0V

4-87

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