Features Small package: SOT-23 No output capacitor required Tolerates capacitive loads Fixed reverse breakdown voltage of 2.50V Description Ideal for space critical applications, the LM4431 voltage reference is available in the sub-miniature (3 mm x 1.3 mm) SOT-23 surface-mount package. The LM4431's advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, thus making the LM4431 easy to use. The operating current range is 100 µA to 15 mA. The LM4431 utilizes fuse and zener-zap reverse breakdown voltage trim during wafer sort to ensure that the parts have an accuracy of better than ±2.0% at 25°C. Bandgap reference temperature drift curvature correction and low dynamic impedance ensure stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents. Key Specification Output voltage tolerance 25°C: ±2.0% (max) Low output noise (10 Hz to 10 kHz): 35 µVrms (typ) Wide operating current range: 100 µA to 15 mA Commercial temperature range: 0°C to +70°C Low temperature coefficient: 30 ppm/°C (typ) Applications Portable, Battery-Powered Equipment Data Acquisition Systems Instrumentation Process Control Energy Management Product Testing Power Supplies

Typical Application *click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM4431 Micropower Shunt Voltage Reference	130 Kbytes	4-Aug-98	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4431M3-2.5/NOPB LM4431M3-2.5 RoHS Status	SOT-23	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1000 AVNET-EM Worldwide 2000 DIGI-KEY Worldwide 6710 MOUSER Worldwide 1703 NEWARK Americas 1081 RS COMPONENTS Worldwide 630 TAYLOR Americas 14624	$0.33 each at 1K+ pcs	reel of 1000
LM4431M3X-2.5/NOPB LM4431M3X-2.5 RoHS Status	SOT-23	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 2800	$0.33 each at 1K+ pcs	reel of 3000

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4431.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4431 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM4431M3-2.5/NOPB LM4431M3-2.5	10.34 10.399	SOT-23	3	1 1	260 260	Detail	Download	N/A	S2E XTT
LM4431M3X-2.5/NOPB LM4431M3X-2.5	10.34 10.399	SOT-23	3	1 1	260 260	Detail	Download	N/A	S2E XTT

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4431.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4431 is located at RoHS Status.

CAD Symbols and Models Download LM4431 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4431M3-2.5	LFAST1	0	20140	0	0	2785000	2	790251354
LM4431M3X-2.5	LFAST1	0	20140	0	0	2785000	2	790251354

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4431.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4431 is located at RoHS Status.