Texas Instruments LM4132BMFX-2.0/NOPB

Overview

LM4132BMFX-2.0/NOPB from Texas Instruments is a precision low-dropout (LDO) voltage reference IC delivering a stable 2.048 V output with ±0.1% initial accuracy (Grade B), 10 ppm/°C temperature coefficient (0°C to 85°C), 60 µA supply current, and 20 mA output drive capability. It operates from VIN = VREF + 400 mV to 5.5 V and supports shutdown via an enable pin, making it suitable for high-accuracy ADC/DAC biasing in portable instrumentation.

For engineers reviewing the LM4132BMFX-2.0/NOPB datasheet, LM4132BMFX-2.0/NOPB pinout, LM4132BMFX-2.0/NOPB application, or LM4132BMFX-2.0/NOPB equivalent, this device offers verified performance in battery-powered test equipment, precision data acquisition systems, and automotive sensor signal conditioning where low drift, low quiescent current, and SOT-23 space efficiency are critical.

Technical Context

The LM4132BMFX-2.0/NOPB implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level accuracy without laser trimming. Its internal design eliminates the need for an output capacitor or buffer amplifier while maintaining stability with low-ESR ceramic capacitors.

This Grade B variant delivers 2.048 V output with 0.1% initial tolerance and 10 ppm/°C tempco over 0°C–85°C - optimized for applications requiring tighter thermal drift than Grade C–E but lower cost than Grade A. The enable pin provides 3 µA shutdown current, supporting power-gated system architectures.

Key Specifications

Pinout & Package

SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, with exposed pad for thermal enhancement (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3020AIDBZR and ADR3420ARJZ-R7, the LM4132BMFX-2.0/NOPB uniquely combines enable-controlled shutdown, industry-leading 10 ppm/°C tempco over 0°C–85°C, and 20 mA drive in a 5-pin SOT-23 - making it optimal for space-constrained, battery-aware precision systems requiring flexible power management.

Availability

LM4132BMFX-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial handheld testers requiring stable component supply with guaranteed long-term availability and TI-authorized traceability.

Supply support for LM4132BMFX-2.0/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 leadership in precision analog ICs.

The LM4132 family was designed to deliver laser-trimmed reference accuracy using cost-effective CMOS + EEPROM trimming - targeting high-reliability instrumentation, automotive, and industrial applications where stability, low power, and small size are essential.

FAQ

What is the output voltage tolerance of the LM4132BMFX-2.0/NOPB over temperature?

The LM4132BMFX-2.0/NOPB has ±0.1% initial accuracy at 25°C and a temperature coefficient of 10 ppm/°C over 0°C to 85°C. Over the full –40°C to +125°C range, its tempco is specified at 20 ppm/°C. This results in a maximum output deviation of ±0.24% across –40°C to +125°C, including initial error and thermal drift - verified per TI's SNVS372G datasheet Section 6.6.

Does the LM4132BMFX-2.0/NOPB require an output capacitor for stability?

No, the LM4132BMFX-2.0/NOPB is internally compensated and stable without an output capacitor. A 0.1 µF ceramic capacitor on VREF is optional and recommended only for noise-sensitive applications such as high-resolution ADC references. The required input capacitor (CIN) is 1 µF ceramic placed close to the VIN pin, as confirmed in the "Simplified Schematic" and Section 8.2 of the LM4132 datasheet.

What is the minimum input voltage required for the LM4132BMFX-2.0/NOPB to maintain regulation?

The LM4132BMFX-2.0/NOPB requires a minimum input-to-output differential of 175 mV at 10 mA load (typical) and up to 400 mV across –40°C to +125°C. Therefore, the minimum valid VIN is 2.048 V + 0.175 V = 2.223 V under nominal conditions. At worst-case temperature and load, VIN must be ≥2.448 V to ensure regulation - per Electrical Characteristics Table 6.6 in the TI SNVS372G datasheet.

How does the enable pin of the LM4132BMFX-2.0/NOPB function?

The EN pin on the LM4132BMFX-2.0/NOPB is an active-high digital control input. It transitions to active mode when voltage exceeds 65% of VIN and enters 3 µA shutdown when pulled below 35% of VIN. No external pull-up/down is required; the pin has no internal bias. This behavior is fully characterized in Section 6.6 (Electrical Characteristics LM4132-2) and Figure 3 ("Enable Threshold Voltage and Hysteresis") of the datasheet.

Is the LM4132BMFX-2.0/NOPB suitable for automotive applications?

Yes - the LM4132BMFX-2.0/NOPB is not the automotive-grade LM4132-Q1 variant, but it shares identical electrical specifications and SOT-23 packaging with the Q1 version. While it lacks AEC-Q100 certification documentation, its Grade B parametric performance (±0.1%, 10 ppm/°C, 125°C max TJ) meets functional requirements for non-safety-critical cabin electronics. For ASIL-compliant designs, TI recommends LM4132QDBVRQ1 instead.