Texas Instruments LM4132DQ1MFT2.5

Overview

LM4132DQ1MFT2.5 from Texas Instruments is a precision low-dropout (LDO) voltage reference IC delivering a stable 2.5 V output with ±0.4% initial accuracy, 20 ppm/°C temperature coefficient over –40°C to +125°C, and 60 µA quiescent current - enabling high-accuracy ADC/DAC biasing in automotive sensor modules and portable instrumentation.

For engineers reviewing the LM4132DQ1MFT2.5 datasheet, LM4132DQ1MFT2.5 pinout, LM4132DQ1MFT2.5 application, or LM4132DQ1MFT2.5 equivalent, key selection factors include its AEC-Q100 Grade 1 qualification, enable-controlled 3 µA shutdown mode, 20 mA output drive capability, SOT-23-5 package compatibility, and stability with low-ESR ceramic capacitors without requiring an output buffer.

Technical Context

The LM4132DQ1MFT2.5 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, achieving laser-trimmed performance at lower cost. It operates as a series reference with VIN range from VREF + 400 mV (2.9 V) to 5.5 V and supports load currents up to 20 mA.

Its enable pin (EN) provides digital on/off control with VIH = 65% VIN and VIL = 35% VIN thresholds, and it achieves 75 ppm thermal hysteresis and 50 ppm long-term stability over 1000 hours - critical for calibration-critical systems where drift must be bounded.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads; RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3325AIDBVR and ADR3425ARJZ-R7, the LM4132DQ1MFT2.5 uniquely combines automotive qualification, integrated enable, 20 mA drive, and SOT-23-5 packaging - making it the only option among the three qualified for direct replacement in AEC-Q100 Grade 1 systems requiring active power gating.

Availability

LM4132DQ1MFT2.5 is available at Aetrix Electronics and suitable for automotive sensor modules, portable test equipment, industrial PLC analog inputs, and battery-powered medical devices requiring stable component supply with guaranteed long-term continuity.

Supply support for LM4132DQ1MFT2.5 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs.

The LM4132 family was designed specifically for high-accuracy, low-power, automotive-qualified voltage references - targeting applications where laser-trimmed performance is needed without the cost penalty, especially in space-constrained SOT-23 systems.

FAQ

What is the maximum input voltage for the LM4132DQ1MFT2.5?

The LM4132DQ1MFT2.5 supports a maximum input voltage of 5.5 V, as specified in the Recommended Operating Conditions table. Exceeding this limit risks permanent damage, and operation above 5.5 V violates absolute maximum ratings. The device is optimized for VIN = VREF + 400 mV (2.9 V) to 5.5 V, ensuring stable regulation across its full load and temperature range.

Does the LM4132DQ1MFT2.5 require an output capacitor for stability?

No, the LM4132DQ1MFT2.5 is stable with only a 1 µF ceramic input capacitor (CIN); an output capacitor (COUT) is optional and not required for stability. This eliminates BOM cost and PCB area typically needed for output buffering, distinguishing it from many competing references that mandate COUT for phase margin.

Is the LM4132DQ1MFT2.5 qualified for automotive applications?

Yes, the LM4132DQ1MFT2.5 is AEC-Q100 qualified for Device Temperature Grade 1 (–40°C to +125°C ambient), with HBM ESD classification Level 2. It is explicitly designated as part of the LM4132-Q1 family and meets automotive reliability and stress-test requirements for use in engine control, cabin sensing, and ADAS subsystems.

What is the output current capability of the LM4132DQ1MFT2.5?

The LM4132DQ1MFT2.5 delivers up to 20 mA of output current while maintaining output voltage accuracy within specification. This enables direct driving of ADC reference inputs, op-amp bias networks, or small DACs without external buffers - a key advantage over micropower references limited to <1 mA.

How does the enable pin (EN) function on the LM4132DQ1MFT2.5?

The EN pin on the LM4132DQ1MFT2.5 is an active-high digital control input. When pulled high to ≥65% of VIN, the device operates normally; when pulled low to ≤35% of VIN, it enters 3 µA shutdown mode. No external pull-up is required, and the pin has no internal pull resistor - system-level logic must drive it actively.