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Design

LM4120

SNVS049D – FEBRUARY 2000 – REVISED JULY 2015

LM4120 Precision Micropower Low Dropout Voltage Reference

1 Features

3 Description

The LM4120 device is a precision low-power, low

1

•

Small SOT23-5 Package

dropout bandgap voltage reference with up to 5-mA

•

Low Dropout Voltage: 120 mV Typical at 1 mA

output current source and sink capability.

•

High Output Voltage Accuracy: 0.2%

This series reference operates with input voltages as

•

Source and Sink Current Output: ±5 mA

low as 2 V and up to 12 V, consuming 160-µA

•

Supply Current: 160

μA Typical

(typical) supply current. In power-down mode, device

current drops to less than 2

μA.

•

Low Temperature Coefficient: 50 ppm/°C

•

Enable Pin

The LM4120 comes in two grades (A and Standard)

and seven voltage options for greater flexibility. The

•

Fixed Output Voltages: 1.8, 2.048, 2.5, 3, 3.3,

best grade devices (A) have an initial accuracy of

4.096, and 5 V

0.2%, while the standard have an initial accuracy of

•

Industrial Temperature Range:

−40°C to 85°C

0.5%,

both

with

a

temperature

coefficient

of

•

(For Extended Temperature Range,

−40°C to

50 ppm/°C ensured from

−40°C to 125°C.

125°C, Contact TI)

The very low dropout voltage, low supply current, and

power-down capability of the LM4120 make this

2 Applications

product an ideal choice for battery-powered and

portable applications.

•

Portable, Battery-Powered Equipment

•

Instrumentation and Process Control

The device performance is ensured over the industrial

temperature range (

−40°C to 85°C), while certain

•

Automotive and Industrial

specifications

are

ensured

over

the

extended

•

Test Equipment

temperature range (

−40°C to 125°C). Contact TI for

•

Data Acquisition Systems

full specifications over the extended temperature

range. The LM4120 is available in a standard 5-pin

•

Precision Regulators

SOT-23 package.

•

Battery Chargers

•

Base Stations

Device Information(1)

•

Communications

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Medical Equipment

LM4120

SOT-23 (5)

1.60 mm × 2.90 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Functional Block Diagram

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.