LM4120 Precision Micropower Low Dropout Voltage Reference

1 Features

• Small SOT23-5 Package
• Low Dropout Voltage: 120 mV Typical at 1 mA
• High Output Voltage Accuracy: 0.2%
• Source and Sink Current Output: ±5 mA
• Supply Current: 160 μA Typical
• Low Temperature Coefficient: 50 ppm/°C
• Enable Pin
• Fixed Output Voltages: 1.8, 2.048, 2.5, 3, 3.3, 4.096, and 5 V
• Industrial Temperature Range: −40°C to 85°C
• (For Extended Temperature Range, −40°C to 125°C, Contact TI)

2 Applications

• Portable, Battery-Powered Equipment
• Instrumentation and Process Control
• Automotive and Industrial
• Test Equipment
• Data Acquisition Systems
• Precision Regulators
• Battery Chargers
• Base Stations
• Communications
• Medical Equipment

3 Description

The LM4120 device is a precision low-power, low dropout bandgap voltage reference with up to 5-mA output current source and sink capability.

This series reference operates with input voltages as low as 2 V and up to 12 V, consuming 160-µA (typical) supply current. In power-down mode, device current drops to less than 2 μA.

The LM4120 comes in two grades (A and Standard) and seven voltage options for greater flexibility. The best grade devices (A) have an initial accuracy of 0.2%, while the standard have an initial accuracy of 0.5%, both with a temperature coefficient of
50 ppm/°C ensured from −40°C to 125°C.

The very low dropout voltage, low supply current, and power-down capability of the LM4120 make this product an ideal choice for battery-powered and portable applications.

The device performance is ensured over the industrial temperature range (−40°C to 85°C), while certain specifications are ensured over the extended temperature range (−40°C to 125°C). Contact TI for full specifications over the extended temperature range. The LM4120 is available in a standard 5-pin SOT-23 package.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Functional Block Diagram

4 Revision History

Changes from E Revision (February 2016) to F Revision

• Added updated Layout Example Go

Changes from D Revision (July 2015) to E Revision

• Added updated Layout ExampleGo

Changes from C Revision (April 2013) to D Revision

• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section. Go

Changes from B Revision (April 2013) to C Revision

• Changed layout of National Data Sheet to TI formatGo

5 Pin Configuration and Functions

DBV Package

5-Pin SOT-23

Top View