LM4051

Precision Micropower Shunt Voltage Reference

General Description

Ideal for space critical applications, the LM4051 precision

voltage reference is available in the sub-miniature (3 mm x

1.3 mm) SSOT-23 surface-mount package. The LM4051’s

advanced design eliminates the need for an external stabiliz-

ing capacitor while ensuring stability with any capacitive

load, thus making the LM4051 easy to use. Further reducing

design effort is the availability of a fixed (1.225V) and adjust-

able reverse breakdown voltage. The minimum operating

current is 60 µA for the LM4051-1.2 and the LM4051-ADJ.

Both versions have a maximum operating current of 12 mA.

The LM4051 comes in three grades (A, B, and C). The best

grade devices (A) have an initial accuracy of 0.1%, while the

B-grade have 0.2% and the C-grade 0.5%, all with a tempco

of 50 ppm/˚C guaranteed from −40˚C to 125˚C.

The LM4051 utilizes fuse and zener-zap trim of reference

voltage during wafer sort to ensure that the prime parts have

Features

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Small packages: SSOT-23

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No output capacitor required

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Tolerates capacitive loads

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Reverse breakdown voltage options of 1.225V and

adjustable

Key Specifications (LM4051-1.2)

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Output voltage tolerance

(A grade, 25˚C)

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Low output noise

(10 Hz to 10kHz)

20µV

rms

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Wide operating current range

60µA to 12mA

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Industrial temperature range

(tempco guaranteed from

−40˚C to +125˚C)

−40˚C to +85˚C

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Low temperature coefficient

50 ppm/˚C (max)

Applications

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Portable, Battery-Powered Equipment

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Data Acquisition Systems

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Instrumentation

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Process Control

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Energy Management

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Automotive and Industrial

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Precision Audio Components

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Base Stations

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Battery Chargers

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Medical Equipment

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Communication

Connection Diagrams

SSOT-23

DS101222-1

*This pin must be left floating or connected to pin 2.

DS101222-40

Top View

See NS Package Number MF03A

February 2000

© 2000 National Semiconductor Corporation

DS101222

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