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LT1431

PRODUCTION

Programmable Reference

Data Sheet Product Selection Table

Part Models: 12
1ku List Price: Starting From $1.19

Viewing:

Overview

Guaranteed 0.4% Initial Voltage Tolerance
0.1Ω Typical Dynamic Output Impedance
Fast Turn-On
Sink Current Capability, 1mA to 100mA
Low Reference Pin Current
Available in J8, N8, S8 or 3-Lead TO-92 Z Packages

The LT1431 is an adjustable shunt voltage regulator with 100mA sink capability, 0.4% initial reference voltage tolerance and 0.3% typical temperature stability. On-chip divider resistors allow the LT1431 to be configured as a 5V shunt regulator, with 1% initial voltage tolerance and requiring no additional external components. By adding two external resistors, the output voltage may be set to any value between 2.5V and 36V. The nominal internal current limit of 100mA may be decreased by including one external resistor.

A simplified 3-pin version, the LT1431CZ/LT1431IZ, is available for applications as an adjustable reference and is pin compatible with the TL431.

Applications

Linear Regulators
Adjustable Power Supplies
Switching Power Supplies

Part Models: 12
1ku List Price: Starting From $1.19

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT1431CN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431CZ#PBF	3-Lead TO-92	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431CZ#TRPBF	3-Lead TO-92	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431IN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431IS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431IZ#PBF	3-Lead TO-92	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431IZ#TRPBF	3-Lead TO-92	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431MPS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1431MPS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package
		PCN24_0234_Form Material_Report Marking Comparison
LT1431CN8#PBF	PRODUCTION
LT1431IN8#PBF	PRODUCTION
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package
		PCN22_0241_Form Material_Report Qualification Results Summary
LT1431CN8#PBF	PRODUCTION
LT1431IN8#PBF	PRODUCTION
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]
		PCN22_0172_Form Material_Report Delta Qualification Matrix
LT1431CN8#PBF	PRODUCTION
LT1431IN8#PBF	PRODUCTION
Oct 8, 2024 - 24_0236 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0236_Form Material_Report Marking Comparison Delta Qualification Matrix
LT1431CS8#PBF	PRODUCTION
LT1431CS8#TRPBF	PRODUCTION
LT1431IS8#PBF	PRODUCTION
LT1431IS8#TRPBF	PRODUCTION
LT1431MPS8#PBF	PRODUCTION
LT1431MPS8#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)
		PCN22_0254_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1431CS8#PBF	PRODUCTION
LT1431CS8#TRPBF	PRODUCTION
LT1431IS8#PBF	PRODUCTION
LT1431IS8#TRPBF	PRODUCTION
LT1431MPS8#PBF	PRODUCTION
LT1431MPS8#TRPBF	PRODUCTION
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0060_Form Material_Report Delta Qualification Matrix
LT1431CS8#PBF	PRODUCTION
LT1431CS8#TRPBF	PRODUCTION
LT1431IS8#PBF	PRODUCTION
LT1431IS8#TRPBF	PRODUCTION
LT1431MPS8#PBF	PRODUCTION
LT1431MPS8#TRPBF	PRODUCTION
Feb 20, 2022 - 22_0014 Final Packaging Changes for TO-92, TO-5 and TO-46
		PCN22_0014_Form Material_Report Other
LT1431CZ#PBF	PRODUCTION
LT1431IZ#PBF	PRODUCTION
Mar 6, 2022 - 22_0014 Final Packaging Changes for TO-92, TO-5 and TO-46
		PCN22_0014_Form Material_Report Other
LT1431CZ#TRPBF	PRODUCTION
LT1431IZ#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

LTspice 9

Models for the following parts are available in LTspice:

LT1431

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.