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Date: 03/02/06

SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown

©Copyright 2006 Sipex Corporation

SPX2920

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

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 Typical) and very low dropout voltage. This

includes a tight initial tolerance of 1% maximum 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 from 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,

surface mount SO-8 (same pin out as SPX2951), SOT-223, 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.

Front View

TO-220-3 (U)

SPX2920

1

2

3

V

IN

TO-263-3 (T)

Top View

1

SPX2920

2

3

V

OUT

GND

V

IN

V

OUT

GND

Top View

2

1

3

4

8

7

6

5

SPX2920

8-Pin Surface Mount

Top View

SPX2920

1

3

2

SOT-223 (M3)

V

OUT

SENSE

SHUTDOWN

GND

V

IN

FEEDBACK

5V/ 3.3V TAP

ERROR

V

IN

GND

GND

GND

100K

ERROR

______

SD

V

OUT

GND

FB

+V

IN

0.01

µF

3

8

1

4

7

SHUTDOWN

INPUT

SPX2920

OFF

ON

+V

IN

5

10

µF

V

REF

R

2

R

1

+

ERROR

OUTPUT

1.2V to 20V

+

2.2

µF

+

SPX2920

V

IN

5V

IN

GND

OUT

IG

0.1

µF

Adjustable Regulator

5V Regulator Circuit

DESCRIPTION

Now Available in Lead Free Packaging

400mA Low Drop Out Voltage Regulator with Shutdown