STMicroelectronics LM336BD

Overview

LM336BD from STMicroelectronics is a precision 2.5V shunt voltage reference IC with adjustable output, low 0.2Ω dynamic impedance, ±3mV initial accuracy at 25°C, and guaranteed temperature stability over 0°C to +70°C. It functions as a programmable Zener replacement in feedback loops of precision regulators, ADC/DAC biasing, and sensor excitation circuits.

For engineers reviewing the LM336BD datasheet, LM336BD pinout, LM336BD application, or LM336BD equivalent, key selection criteria include its 400µA–10mA operating current range, 2.5V nominal reference voltage with ADJ-pin tuning capability, low-temperature-coefficient operation, and SO-8 package compatibility with automated assembly.

Technical Context

The LM336BD implements an adjustable bandgap-based shunt reference architecture with a dedicated ADJ terminal enabling fine-tuning of breakdown voltage without altering temperature coefficient. Its internal structure supports stable regulation across wide current variation (400µA–10mA) while maintaining sub-1Ω dynamic impedance.

It operates exclusively in reverse-biased mode with specified absolute maximum reverse current of 10mA and storage temperature range of −65°C to +150°C. The device requires no external capacitors for stability and delivers <6mV total voltage drift over its full operating temperature range (0°C to +70°C).

Key Specifications

Pinout & Package

LM336BD is housed in an SO-8 plastic micropackage (ECOPACK® compliant, lead-free second-level interconnect), measuring 4.80–5.00mm × 3.80–4.00mm × 1.25mm height, compatible with standard surface-mount reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Compared with TL431ACD and REF200AID, the LM336BD uniquely supports simultaneous adjustment of both reference voltage and temperature coefficient via its ADJ pin-enabling single-component optimization of accuracy and thermal behavior in high-stability analog signal chains.

Availability

LM336BD is available at Aetrix Electronics and suitable for precision power regulators, ADC reference sources, sensor excitation circuits, and adjustable shunt regulators requiring stable component supply across industrial, test & measurement, and medical electronics programs.

Supply support for LM336BD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, MEMS, and power devices for industrial, automotive, and consumer markets.

The LM336BD belongs to ST's precision voltage reference product line, engineered specifically for applications demanding low-drift, low-impedance, and user-adjustable reference performance in space-constrained SO-8 layouts.

FAQ

What is the minimum operating current for stable regulation?

The LM336BD maintains regulation down to 400µA, verified across temperature and process corners. Below this threshold, reference voltage deviates beyond ±10mV due to insufficient internal bias current; design must ensure series resistor limits minimum current to ≥400µA at lowest input voltage.

Can the ADJ pin be left unconnected?

No-leaving the ADJ pin floating causes unpredictable reference voltage and temperature coefficient. It must be connected either to V− (for nominal 2.49V operation) or to an external resistor network for adjustment; ST recommends a 10kΩ potentiometer between V− and V+ for calibrated tuning.

Is the SO-8 package RoHS-compliant?

Yes-the LM336BD SO-8 package is ECOPACK® certified with lead-free second-level interconnect, fully compliant with RoHS Directive 2011/65/EU and JEDEC JESD97 marking standards. The inner box label indicates "Lead-Free" and specifies soldering profile limits.

How does long-term drift affect calibration intervals?

With 20ppm drift over 1000 hours, the LM336BD contributes ≤0.005% full-scale error after one year of continuous operation at 25°C. This supports annual calibration cycles in portable test equipment, reducing maintenance overhead versus references with >50ppm/year drift.