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Date: 05/25/04

SPX2931 100mA Low Dropout Voltage Regulator

© Copyright 2004 Sipex Corporation

In most applications the SPX2931 is operating

at few milliamps. In these applications the out-

put capacitance can be further reduced. For

example, when the regulator is running at 10mA

output current the output capacitance value is

half compared to the same regulator that is

running at 100 mA. The value decreases with

higher output voltages, since the internal loop

gain is reduced.

The worst case occurs at the lower temperature

and maximum operating currents, the entire

circuit and the electrolytic, should be cooled

down to the minimum temperature. The mini-

mum of 0.6 volts required at the input of regula-

tor above the output to keep the power dissipa-

tion and die heating to its minimum. After the

value for the capacitor has been determined for

actual use, the value should be doubled.

TYPICAL PERFORMANCE CHARACTERISTICS

PACKAGE PINOUTS

Bottom View

TO-92 (N)

SOT-89 (M1)

Top View

1

2

3

V

IN

GND

13

2

GND

V

IN

V

OUT