LP2950-N, LP2951-N

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SNVS764N – JANUARY 2000 – REVISED MAY 2013

LP2950-N/LP2951-N Series of Adjustable Micropower Voltage Regulators

Check for Samples: LP2950-N, LP2951-N

1

FEATURES

DESCRIPTION

The

LP2950-N

and

LP2951-N

are

micropower

2

•

5V, 3V, and 3.3V Versions Available

voltage regulators with very low quiescent current (75

•

High Accuracy Output Voltage

μA typ.) and very low dropout voltage (typ. 40 mV at

•

Ensured 100 mA Output Current

light loads and 380 mV at 100 mA). They are ideally

suited

for

use

in

battery-powered

systems.

•

Extremely Low Quiescent Current

Furthermore, the quiescent current of the LP2950-

•

Low Dropout Voltage

N/LP2951-N

increases

only

slightly

in

dropout,

•

Extremely Tight Load and Line Regulation

prolonging battery life.

•

Very Low Temperature Coefficient

The LP2950-N-5.0 is available in the surface-mount

•

Use as Regulator or Reference

PFM package, and in the popular 3-pin TO-92

package for pin-compatibility with older 5V regulators.

•

Needs Minimum Capacitance for Stability

The 8-lead LP2951-N is available in plastic, ceramic

•

Current and Thermal Limiting

dual-in-line, WSON, or metal can packages and

•

Stable With Low-ESR Output Capacitors (10

offers additional system functions.

m

Ω to 6Ω)

One such feature is an error flag output which warns

of a low output voltage, often due to falling batteries

LP2951-N VERSIONS ONLY

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

•

Error Flag Warns of Output Dropout

second feature is the logic-compatible shutdown input

which enables the regulator to be switched on and

•

Logic-Controlled Electronic Shutdown

off. Also, the part may be pin-strapped for a 5V, 3V,

•

Output Programmable From 1.24 to 29V

or 3.3V output (depending on the version), or

programmed from 1.24V to 29V with an external pair

of resistors.

Careful

design

of

the

LP2950-N/LP2951-N

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

Figure 1. LP2950-N

1

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2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2000–2013, 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.