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Reference Design
LM4120
SNVS049F – FEBRUARY 2000 – REVISED MARCH 2016
LM4120 Precision Micropower Low Dropout Voltage Reference
1 Features
•1 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
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.
LM4120
SNVS049F – FEBRUARY 2000 – REVISED MARCH 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 3 6 Specifications......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3 6.2 ESD Ratings.............................................................. 3 6.3 Recommended Operating Conditions ...................... 4 6.4 Thermal Information .................................................. 4 6.5 Electrical Characteristics........................................... 4 6.6 Typical Characteristics .............................................. 7 7 Detailed Description ............................................ 10 7.1 Overview ................................................................. 10 7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 10 7.4 Device Functional Modes........................................ 10 8 Application and Implementation ........................ 11 8.1 Application Information............................................ 11 8.2 Typical Application .................................................. 14 9 Power Supply Recommendations...................... 15 10 Layout................................................................... 16 10.1 Layout Guidelines ................................................. 16 10.2 Layout Example ................................................... 16 11 Device and Documentation Support ................. 17 11.1 Community Resources.......................................... 17 11.2 Trademarks ........................................................... 17 11.3 Electrostatic Discharge Caution ............................ 17 11.4 Glossary ................................................................ 17 12 Mechanical, Packaging, and Orderable Information ........................................................... 17
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (February 2016) to.