TI LM385M3-1,2/NOPB

Mfr. Part

LM385M3-1,2/NOPB

Manufacturer

Luminary Micro/Texas Instruments

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Detailed Description

Micropower 1.2 V shunt voltage reference in a compact SOT-23 package. Works like a precision low-voltage Zener diode to establish a stable reference voltage across a wide current range. Low operating current, low dynamic impedance, and good stability over temperature and load. Ideal for low-power designs where small size and simple biasing are required.

Main category Integrated Circuits ICs

Subcategory Specialized ICs

Key Features

1.2 V nominal reference voltage for accurate thresholds and biasing

Shunt reference topology for simple two-terminal use

Micropower operation suited for battery-powered devices

Stable over a wide current range

Low dynamic impedance for solid line and load regulation

Small SOT-23 footprint for space-constrained designs

Lead-free NOPB material for RoHS compliance

Key Advantages

Easy drop-in precision replacement for low-voltage Zener diodes

Saves power thanks to very low operating current

Simple circuit connection reduces design effort and BOM

Reliable performance over temperature and load changes

Compact package improves board density

Broad ecosystem and documentation from TI

Packaging

Package type SOT-23 three-lead plastic

Material molded epoxy body with tin-plated copper leads, NOPB lead-free finish

Approx dimensions body about 2.9 mm x 1.3 mm x 1.1 mm overall footprint small and low profile

Pin configuration functional pins are Anode and Cathode third pin is typically No Connect consult datasheet for exact pin map

Tape and reel options available for automated assembly

Thermal characteristics small-outline package with typical junction-to-ambient thermal resistance in the hundreds of °C/W range depending on PCB copper area and airflow follow derating guidance

Electrical properties nominal reference 1.2 V low operating current range suitable from tens of microamps to tens of milliamps low dynamic impedance low noise and stable regulation check datasheet for grade-specific tolerance and tempco

Lifecycle

Current status expected active with ongoing TI support

Not known to be near discontinuation based on typical family status

Equivalent or alternative models

- LM385M3-2.5/NOPB same family 2.5 V reference option

- LM4041-1.2 SOT-23 precision 1.225 V shunt reference low-power

- TLV431 adjustable shunt reference 1.24 V reference good for programmable thresholds

- LMV431 low-voltage adjustable shunt reference for portable systems

- TLVH431 low-voltage adjustable shunt reference variant

- ADR5041 Analog Devices 1.2 V micropower shunt reference

- LT1004-1.2 Linear Technology ADI 1.2 V reference diode

- MAX6002 Maxim Integrated 1.23 V micropower shunt reference

Electrical compatibility and performance can vary across alternatives review datasheets to confirm fit

If you need an exact cross or long-term supply plan contact our Y-IC sales team via our website for detailed support

Key Application Areas

Precision thresholds and battery monitoring

Reference voltage for ADCs, DACs, and sensor front-ends

Portable and battery-powered instruments

Low-noise biasing in analog signal chains

Power supply sequencing and undervoltage detection

General replacement for small Zener diodes in precision circuits

Datasheet

Y-IC hosts the most authoritative datasheet for this model on our product page. Download it here to get exact electrical limits, pinouts, and application guidance.

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