SPX2920T-5.0 Просмотр технического описания (PDF) - Signal Processing Technologies

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SPX2920T-5.0

400mA Low Drop Out Voltage Regulator with Shutdown

Signal Processing Technologies 

®

SPX2920

400mA Low Drop Out Voltage Regulator with Shutdown

FEATURES

■ Output 3.3V, 5.0V, at 400mA Output

■ Very Low Quiescent Current

■ Low Dropout Voltage

■ Extremely Tight Load And Line Regulation

■ Very Low Temperature Coefficient

■ Current & Thermal Limiting

■ Error Flag Warns Of Output Dropout

(for SO-8)

■ Logic-Controlled Electronic Shutdown

(for SO-8)

■ Output Programmable From 1.24V to 20V

(for SO-8)

■ Equivalent Replacement for MIC2920A and

MIC2904

+VIN

100K

SHUTDOWN

INPUT

OFF

ON

8 +VIN

1

VOUT

SPX2920 FB 7

SD

3

______

ERROR

GND

5

4

1.2V to 20V

+

R1 0.01µF 10µF

VREF

R2

ERROR

OUTPUT

Adjustable Regulator

VIN

+

0.1 µF

IN

OUT

SPX2920

GND

IG

5V

+

2.2 µF

5V Regulator Circuit

DESCRIPTION

The SPX2920 is a low power voltage regulator. This device is an excellent choice for use in battery-powered

applications such as cordless telephones, radio control systems, and portable computers. The SPX2920

features very low quiescent current (140µA Typ.) and very low dropout voltage. This includes a tight initial

tolerance of 1% max and very low output temperature coefficient, making the SPX2920 useful as a low-

power voltage reference.

The error flag output feature is used as power-on reset for warning of a low output voltage, due to a falling

voltage input of batteries. Another feature is the logic-compatible shutdown input which enables the

regulator to be switched on and off. The SPX2920 is offered in 3-pin TO-220 package, SO-8 (same pin

out as SPX2951), SOT-223, and surface mount and 3-pin TO-263 packages.

The regulator output voltage (of the SO-8) may be pin-strapped for a 3.3V and 5.0V or programmed from

1.24V to 20V with an external pair of resistors.

TO-220-3 (U)

SPX2920

123

TO-263-3 (T)

SPX2920

1

2

3

8-Pin Surface Mount

SOT-223 (M3)

VOUT

SENSE

SHUTDOWN

GND

1

8

2

7

SPX2920

3

6

4

5

VIN

FEEDBACK

5V/ 3.3V TAP

ERROR

SPX2920

1 23

VIN GND VOUT

VIN GND VOUT

Front View

VIN GND VOUT

Top View

Top View

Top View

Rev: A Date: 03/30/04

SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown

1

©Copyright 2004 Sipex Corporation

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