Texas Instruments LM4132DMFX-3.0/NOPB

Overview

LM4132DMFX-3.0/NOPB from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 3.0 V output with 0.05% initial accuracy, 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current. It features an enable pin for 3 µA shutdown mode and supports up to 20 mA load current - used in high-accuracy ADC/DAC biasing, portable instrumentation, and automotive sensor signal conditioning.

For engineers reviewing the LM4132DMFX-3.0/NOPB datasheet, LM4132DMFX-3.0/NOPB pinout, LM4132DMFX-3.0/NOPB application, or LM4132DMFX-3.0/NOPB equivalent, key selection criteria include dropout voltage (175 mV at 10 mA), line regulation (70 ppm/V), load regulation (25 ppm/mA), thermal hysteresis (75 ppm), and SOT-23-5 package compatibility with space-constrained PCB layouts.

Technical Context

The LM4132DMFX-3.0/NOPB implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision without laser trimming. Its internal architecture eliminates the need for an output capacitor or buffer amplifier while maintaining stability with low-ESR ceramic capacitors.

It operates as a series reference with VIN range from VREF + 400 mV (3.4 V min) to 5.5 V, supporting battery-powered systems where low quiescent current (60 µA) and low dropout are critical. The enable pin provides digital control of output state, with VIH = 65% VIN and VIL = 35% VIN thresholds across –40°C to +125°C.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3030AIDBZR and ADR3430ARJZ-R7, the LM4132DMFX-3.0/NOPB uniquely combines A-grade accuracy, enable functionality, and ultra-low IQ in a single SOT-23-5 package - making it optimal for battery-critical, high-precision embedded systems requiring dynamic power control.

Availability

LM4132DMFX-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and full traceability.

Supply support for LM4132DMFX-3.0/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.

The LM4132 family was designed for high-accuracy, low-power reference needs in space-constrained and battery-operated systems - targeting instrumentation, automotive sensing, and industrial automation where laser-trimmed performance is required at CMOS cost.

FAQ

What is the minimum input voltage required for stable operation of the LM4132DMFX-3.0/NOPB?

The LM4132DMFX-3.0/NOPB requires a minimum input voltage of VREF + 400 mV, i.e., 3.4 V, to maintain output regulation within 0.5% accuracy at 10 mA load. Below this, dropout behavior occurs - verified per Section 6.8 of the SNVS372G datasheet. Operation down to 3.4 V enables direct use from 3.3 V rails with margin or single-cell Li-ion (3.0–4.2 V) with appropriate headroom.

Does the LM4132DMFX-3.0/NOPB require an output capacitor for stability?

No, the LM4132DMFX-3.0/NOPB is internally compensated and stable without an output capacitor - a key differentiator from most LDO references. The datasheet explicitly states COUT is optional (Section 3, "Simplified Schematic"), and typical applications use only the required CIN (≥1 µF ceramic). This simplifies layout and reduces BOM count.

What does the "/NOPB" suffix indicate in LM4132DMFX-3.0/NOPB?

The "/NOPB" suffix denotes lead-free (Pb-free) and RoHS-compliant packaging. LM4132DMFX-3.0/NOPB uses matte-tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing standard reflow without baking. It is not a functional variant - electrical specs match the base LM4132DMFX-3.0 part.

Is the LM4132DMFX-3.0/NOPB pin-compatible with other LM4132 variants like LM4132DMFX-2.5?

Yes - all LM4132x DMFX variants (1.8 V, 2.048 V, 2.5 V, 3.0 V, 3.3 V, 4.096 V) share identical SOT-23-5 (DBV) pinout and footprint. Pin 1 is N/C, Pin 2 is GND, Pin 3 is EN, Pin 4 is VIN, and Pin 5 is VREF across the entire family, enabling drop-in voltage option changes on existing PCBs.

How is the enable pin (EN) of the LM4132DMFX-3.0/NOPB interfaced in a microcontroller system?

The EN pin of the LM4132DMFX-3.0/NOPB accepts logic-high input at ≥65% VIN (e.g., ≥3.25 V when VIN = 5 V) and logic-low at ≤35% VIN (e.g., ≤1.75 V). For 3.3 V GPIO control, a level-shifter or resistor divider may be needed - or operate VIN at 4.5 V to ensure compatibility. TI recommends pulling EN to GND via 100 kΩ for default shutdown.