LP4950C-5V, LP4951C

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SNVS208C – SEPTEMBER 2002 – REVISED APRIL 2013

LP4950C-5V and LP4951C Adjustable Micropower Voltage Regulators

Check for Samples: LP4950C-5V, LP4951C

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FEATURES

DESCRIPTION

The LP4950C and LP4951C are micropower voltage

2

•

High Accuracy 5V Specified 100mA Output

regulators with very low quiescent current (75

μA typ.)

•

Extremely Low Quiescent Current

and very low dropout voltage (typ. 40mV at light loads

•

Low Dropout Voltage

and 380mV at 100mA). They are ideally suited for

use in battery-powered systems. Furthermore, the

•

Extremely Tight Load and Line Regulation

quiescent

current

of

the

LP4950C/LP4951C

•

Very Low Temperature Coefficient

increases only slightly in dropout, prolonging battery

•

Use as Regulator or Reference

life.

•

Needs Only 1

μF for Stability

The LP4950C in the popular 3-pin TO-92 package is

•

Current and Thermal Limiting

pin compatible with older 5V regulators. The 8-lead

.

LP4951C is available in a plastic surface mount

package and offers additional system functions.

LP4951C VERSIONS ONLY

One such feature is an error flag output which warns

of a low output voltage, often due to falling batteries

•

Error Flag Warns of Output Dropout

on the input. It may be used for a power-on reset. A

•

Logic-controlled Electronic Shutdown

second feature is the logic-compatible shutdown input

•

Output Pogrammable From 1.24 to 29V

which enables the regulator to be switched on and

off. Also, the part may be pin-strapped for a 5V

output or programmed from 1.24V to 29V with an

external pair of resistors.

Careful

design

of

the

LP4950C/LP4951C

has

minimized all contributions to the error budget. This

includes a tight initial tolerance (.5% typ.), extremely

good load and line regulation (.05% typ.) and a very

low output voltage temperature coefficient, making

the part useful as a low-power voltage reference.

BLOCK DIAGRAM AND TYPICAL APPLICATIONS

LP4950C

LP4951C

Figure 1.

Figure 2.

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PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.