Texas Instruments LM4132EMFX-1.8/NOPB

Overview

LM4132EMFX-1.8/NOPB from Texas Instruments is a precision low-dropout (LDO) voltage reference IC delivering a stable 1.8 V output with ±0.05% initial accuracy (A-grade), 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA supply current. It features an enable pin for 3 µA shutdown mode, supports up to 20 mA load, and operates from VIN = VREF + 400 mV to 5.5 V - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.

For engineers reviewing the LM4132EMFX-1.8/NOPB datasheet, LM4132EMFX-1.8/NOPB pinout, LM4132EMFX-1.8/NOPB application, or LM4132EMFX-1.8/NOPB equivalent, key selection criteria include dropout voltage at 10 mA (230 mV typ), long-term stability (50 ppm over 1000 hrs), thermal hysteresis (75 ppm), line regulation (30 ppm/V), and compatibility with low-ESR ceramic capacitors without requiring an output buffer.

Technical Context

The LM4132EMFX-1.8/NOPB uses EEPROM-trimmed CMOS band-gap architecture to correct curvature, tempco, and initial accuracy at package level - overcoming assembly-induced shifts that limit laser-trimmed bipolar references. Its internal circuitry enables direct 20 mA sourcing without external buffering.

It implements a series-shunt topology with active enable control: EN pin accepts 35%–65% of VIN as logic thresholds, enabling fast turn-on/turn-off transients. Dropout is defined as the minimum VIN–VREF differential causing 0.5% output deviation - specified at 230 mV (typ) for 10 mA load at 25°C.

Key Specifications

Pinout & Package

SOT-23 (DBV) 5-pin plastic package, 2.90 mm × 1.60 mm body size, with exposed pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3018AIDBZR and ADR3418ARJZ-R7, the LM4132EMFX-1.8/NOPB uniquely combines A-grade accuracy, enable-controlled shutdown, and SOT-23-5 pinout compatibility - making it optimal for battery-sensitive, thermally demanding, and power-sequenced systems where reference activation must align with system state.

Availability

LM4132EMFX-1.8/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial PLC analog inputs requiring stable component supply with guaranteed long-term availability and traceable lot control.

Supply support for LM4132EMFX-1.8/NOPB 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs.

The LM4132 product line delivers laser-trimmed reference performance using EEPROM-programmable CMOS band-gap architecture - designed specifically for high-accuracy, low-power, and automotive-grade applications where stability, tempco, and long-term drift are critical.

FAQ

What is the maximum load current supported by the LM4132EMFX-1.8/NOPB?

The LM4132EMFX-1.8/NOPB supports up to 20 mA of continuous output current across its full operating temperature range (–40°C to +125°C). This is verified per TI's Electrical Characteristics table for LM4132-1.8, where both typical and maximum load current ratings are specified at 20 mA under recommended operating conditions. The device maintains output regulation within 0.5% accuracy at this load.

Does the LM4132EMFX-1.8/NOPB require an output capacitor for stability?

No, the LM4132EMFX-1.8/NOPB is internally compensated and stable without an output capacitor (COUT). The datasheet explicitly states "COUT is optional" and confirms stability with only the required input capacitor (CIN). Adding COUT may improve transient response but is never mandatory - a key advantage over many competing references that demand output capacitance for phase margin.

What is the dropout voltage specification for the LM4132EMFX-1.8/NOPB at 10 mA load?

The dropout voltage for the LM4132EMFX-1.8/NOPB is 230 mV typical and 400 mV maximum at 10 mA load and 25°C. This value is defined as the minimum VIN–VREF differential required to maintain output voltage within 0.5% of nominal. At –40°C to +125°C, the worst-case dropout remains ≤400 mV, enabling reliable operation down to VIN = 2.2 V.

Is the LM4132EMFX-1.8/NOPB qualified for automotive applications?

Yes - the LM4132EMFX-1.8/NOPB is part of the LM4132-Q1 family and is AEC-Q100 qualified for Device Temperature Grade 1 (–40°C to +125°C ambient). It meets HBM ESD Class 2 (±2000 V) and is rated for automotive cabin and industrial control environments without derating, as confirmed in Section 1 of the official TI datasheet SNVS372G.

What does the 'E' grade designation mean in LM4132EMFX-1.8/NOPB?

The 'E' in LM4132EMFX-1.8/NOPB indicates the device is manufactured to the E-grade specification: ±0.5% initial output voltage accuracy and 30 ppm/°C maximum temperature coefficient (–40°C to +125°C). This contrasts with the A-grade version (LM4132AMFX-1.8/NOPB), which offers ±0.05% accuracy and 10 ppm/°C tempco. Both share identical pinout, package, and functional behavior.