Texas Instruments LM2936QMPX-3.0/NOPB

Overview

LM2936QMPX-3.0/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified ultralow-quiescent-current LDO voltage regulator delivering a fixed 3.0 V output at up to 50 mA, with ≤15 μA quiescent current at 100 μA load, ±2% initial output tolerance, and 200 mV typical dropout at full load. It serves as the primary post-regulation power source in automotive body control modules, telematics units, and always-on sensor nodes where battery longevity and reverse-battery survivability are critical.

For engineers reviewing the LM2936QMPX-3.0/NOPB datasheet, LM2936QMPX-3.0/NOPB pinout, LM2936QMPX-3.0/NOPB application, or LM2936QMPX-3.0/NOPB equivalent, key selection criteria include its −50 V input transient rating, reverse-battery protection, 40 V max operating voltage, ±3% output tolerance over −40°C to +125°C, and mandatory 22 µF/0.3–8 Ω ESR output capacitor requirement for stability.

Technical Context

The LM2936QMPX-3.0/NOPB employs a PNP pass transistor architecture enabling low dropout operation while maintaining ultralow quiescent current across wide input voltage (5.5 V–40 V) and temperature (−40°C to +125°C) ranges. Its internal bandgap reference and error amplifier deliver tight DC regulation without external feedback components.

It integrates reverse-polarity input protection, thermal shutdown triggered at ~160°C, and short-circuit current limiting (~65–250 mA), all operating autonomously without external circuitry. No shutdown pin is present - this variant is always-on, distinguishing it from LM2936QHBMA variants with SD functionality.

Key Specifications

Pinout & Package

LM2936QMPX-3.0/NOPB is supplied in a 3-pin TO-252 (NDP) surface-mount package with exposed thermal pad. The package measures 6.10 mm × 6.58 mm and features low thermal resistance (R_θJA = 50.5°C/W) when mounted on ≥1 in² 2 oz copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2936QMPX-3.0/NOPB, TPS7B6733QPWPRQ1 offers controllability at the cost of higher quiescent draw and reduced cold-crank margin, while NCP163AMX300TBG achieves lower I_Q but sacrifices AEC-Q100 qualification, reverse-battery hardening, and high-temperature capability - making LM2936QMPX-3.0/NOPB the only choice for Grade 1 automotive environments demanding both ultra-low I_Q and full fault resilience.

Availability

LM2936QMPX-3.0/NOPB is available at Aetrix Electronics and suitable for automotive electronics, industrial telemetry, and battery-powered sensor networks requiring stable component supply across extended temperature and long product lifecycles.

Supply support for LM2936QMPX-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 designing analog ICs, embedded processors, and system solutions for automotive, industrial, and personal electronics markets.

The LM2936Q series was developed specifically for automotive power management, targeting always-on subsystems that demand ultralow quiescent current, high-voltage resilience, and AEC-Q100 reliability - with LM2936QMPX-3.0/NOPB representing the 3.0 V, TO-252 packaged variant optimized for thermal performance and board-level ruggedness.

FAQ

What is the maximum input voltage rating for LM2936QMPX-3.0/NOPB?

The LM2936QMPX-3.0/NOPB has a maximum continuous operating input voltage of 40 V and can survive −50 V reverse-polarity transients for 1 ms. It is not rated for 60 V operation - that specification applies only to the LM2936QHBM variant. Exceeding 40 V risks thermal runaway due to power dissipation limits in the TO-252 package, even if the device remains functional momentarily.

Does LM2936QMPX-3.0/NOPB include a shutdown pin?

No, LM2936QMPX-3.0/NOPB does not include a shutdown (SD) pin. It is a permanently enabled LDO. The shutdown feature is exclusive to the LM2936QHBMA variant (5 V version with 8-pin SOIC). This simplifies design for always-on applications but precludes dynamic power gating - users requiring enable control must select LM2936QHBMA or alternative regulators with EN functionality.

What output capacitor is required for stable operation of LM2936QMPX-3.0/NOPB?

LM2936QMPX-3.0/NOPB requires a minimum 22 µF output capacitor with an ESR between 0.3 Ω and 8 Ω, rated for the full −40°C to +125°C operating range. Ceramic capacitors may be used only with a series resistor (typically 500 mΩ–1 Ω) to emulate required ESR. Using undersized capacitance or out-of-range ESR will cause oscillation and output instability, as confirmed in TI's Electrical Characteristics tables and Application Note SLVA115.

Is LM2936QMPX-3.0/NOPB qualified for automotive use?

Yes, LM2936QMPX-3.0/NOPB is AEC-Q100 qualified for Grade 1 (−40°C to +125°C ambient), with full test reports covering HTOL, TC, UHAST, and ESD per JESD22 standards. Its qualification covers the TO-252 (NDP) package variant specifically, and includes validation of reverse-battery survival, load-dump immunity, and parametric stability across temperature and life testing - making it suitable for ASIL-B compliant automotive subsystems.

What is the thermal performance of LM2936QMPX-3.0/NOPB in its TO-252 package?

LM2936QMPX-3.0/NOPB in the TO-252 (NDP) package has a junction-to-ambient thermal resistance (R_θJA) of 50.5°C/W on a standard JEDEC High-K test board. Its junction-to-board (R_θJB) is 29.7°C/W, indicating strong heat transfer through the thermal pad to the PCB. For continuous 50 mA operation at 40 V input, power dissipation reaches 1.85 W - requiring ≥2 in² of 2 oz copper to maintain TJ < 125°C at 85°C ambient, per TI's thermal calculations in Section 8.2.2.3.