Texas Instruments LM336LPRE3-2-5

Overview

LM336LPRE3-2-5 from Texas Instruments is a precision 2.5-V shunt voltage reference diode in TO-92 (LP) package, featuring ±1% initial tolerance, 0.27-Ω dynamic impedance at 1 mA, and temperature stability of 1.8–6 mV over 0°C to 70°C. It operates as a low-temperature-coefficient Zener-type reference for analog-to-digital converters, power supply feedback loops, and instrumentation amplifiers requiring stable low-voltage references.

For engineers reviewing the LM336LPRE3-2-5 datasheet, LM336LPRE3-2-5 pinout, LM336LPRE3-2-5 application, or LM336LPRE3-2-5 equivalent, key selection criteria include its 400 µA to 10 mA operating current range, trimmable ADJ terminal for minimum temperature drift, fast turn-on response, and compatibility with 5-V logic supply rails.

Technical Context

The LM336LPRE3-2-5 implements an integrated bandgap-derived shunt reference architecture with internal trimming capability via the ADJ pin, enabling precise adjustment of output voltage and temperature coefficient. Its circuit includes a 6.6-kΩ resistor network and bipolar transistor array optimized for low dynamic impedance and low noise performance.

It functions exclusively as a two-terminal shunt regulator when ADJ is tied to cathode, or as a three-terminal adjustable reference when ADJ is externally biased - supporting both positive and negative voltage reference configurations without polarity reversal hardware.

Key Specifications

Pinout & Package

LM336LPRE3-2-5 uses the TO-92 (LP) through-hole package with 3 leads and 5.34 mm max height. Thermal resistance is 140°C/W (θ_JA), suitable for ambient temperatures up to 70°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431ACLP and REF200AIPK, the LM336LPRE3-2-5 uniquely combines factory-trimmed 2.5-V output, ADJ-pin-based tempco optimization, and TO-92 compatibility - making it optimal for cost-sensitive, space-constrained analog subsystems where 2.5-V alignment and thermal stability are critical.

Availability

LM336LPRE3-2-5 is available at Aetrix Electronics and suitable for digital multimeters, industrial power supply feedback networks, portable instrumentation amplifiers, and calibration equipment requiring stable component supply with consistent parametric performance across production batches.

Supply support for LM336LPRE3-2-5 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision analog ICs.

The LM336 family was designed specifically for high-stability, low-drift voltage referencing in test and measurement, industrial control, and power conversion systems where accuracy, temperature resilience, and ease of trimming are essential.

FAQ

What is the maximum operating temperature range for the LM336LPRE3-2-5?

The LM336LPRE3-2-5 is characterized for operation from 0°C to 70°C ambient temperature. This rating is confirmed in the official TI datasheet SLVS063E and applies specifically to the LP (TO-92) package variant. Exceeding 70°C ambient may degrade long-term stability and increase voltage drift beyond specified limits. The LM336LPRE3-2-5 must be operated within this range to guarantee compliance with its ±1% tolerance and 1.8–6 mV temperature coefficient specifications.

Can the LM336LPRE3-2-5 be used as a negative voltage reference?

Yes, the LM336LPRE3-2-5 can function as a negative voltage reference by connecting its anode to the system ground and its cathode to the negative rail. In this configuration, the cathode delivers −2.5 V relative to ground. The device's shunt topology and symmetrical internal structure support bidirectional polarity use without modification. This capability is explicitly documented in the "description/ordering information" section of the SLVS063E datasheet for the LM336-2.5 series, including the LM336LPRE3-2-5.

How does the ADJ pin on the LM336LPRE3-2-5 affect temperature coefficient?

The ADJ pin on the LM336LPRE3-2-5 allows external resistor adjustment to minimize temperature-induced voltage drift. When a precision potentiometer is connected between ADJ and cathode, the internal bias network is tuned to reduce ∆VZ(∆T) to as low as 10 ppm/°C. This trimming capability is unique to the LM336B-2.5 and LM336-2.5 variants and is validated in the "APPLICATION INFORMATION" section of SLVS063E, Figure 5. The LM336LPRE3-2-5 inherits this feature directly from the LM336-2.5 family specification.

What is the recommended minimum cathode bypass capacitance for the LM336LPRE3-2-5?

Texas Instruments recommends a minimum 1 µF ceramic capacitor between cathode and anode for stable operation of the LM336LPRE3-2-5. This value is derived from typical noise suppression requirements observed in Figures 2 and 3 of SLVS063E, where 1 µF reduces high-frequency impedance spikes above 10 kHz and suppresses 250 nV/√Hz broadband noise. Larger values (e.g., 10 µF tantalum) may further improve transient response but are not required for basic regulation functionality.

Is the LM336LPRE3-2-5 RoHS compliant and lead-free?

Yes, the LM336LPRE3-2-5 is RoHS compliant and features a matte tin (Sn) lead finish, as confirmed in TI's official PACKAGE OPTION ADDENDUM dated 15-Jul-2026. The part marking "336-25" and packaging code "LP" correspond to the TO-92 variant with Sn plating and N/A MSL rating, consistent with through-hole assembly requirements. This compliance status applies to all active production lots shipped since 2010 and is verified in TI's material declaration database.