Texas Instruments LM2936DTX-3.0/NOPB

Overview

LM2936DTX-3.0/NOPB from Texas Instruments is a fixed 3.0 V ultra-low quiescent current (≤15 μA at 100 μA load) LDO voltage regulator in TO-252 (DPAK) package, featuring 50 mA output capability, ±2% initial output tolerance, 200 mV typical dropout at 50 mA, and reverse battery protection. It serves as a primary power supply for automotive microcontrollers, sensor modules, and always-on telematics subsystems requiring extended battery life.

For engineers reviewing the LM2936DTX-3.0/NOPB datasheet, LM2936DTX-3.0/NOPB pinout, LM2936DTX-3.0/NOPB application, or LM2936DTX-3.0/NOPB equivalent, key selection criteria include input voltage range (4.0–26 V), thermal performance in TO-252 (θJA = 136°C/W for PFM variant, confirmed equivalent thermal design for NDP package), ESR-stable output capacitance requirements (0.3–8 Ω), and −50 V reverse transient protection compliance.

Technical Context

The LM2936DTX-3.0/NOPB employs a PNP pass transistor architecture enabling low dropout operation while maintaining regulation down to 4.0 V input. Its internal circuitry integrates reverse battery protection, thermal shutdown (typically 160°C), and short-circuit current limiting (65–250 mA), all operating across −40°C to +125°C ambient.

Unlike standard LDOs, it sustains regulation up to 40 V input (survives −50 V transients and +60 V survival rating), with quiescent current remaining ≤20 μA over full temperature and line/load range - critical for automotive sleep-mode power budgets.

Key Specifications

Pinout & Package

LM2936DTX-3.0/NOPB uses the TO-252 (DPAK, package drawing NDP0003B) surface-mount package with exposed thermal pad. The 3-pin configuration provides compact footprint and enhanced thermal dissipation versus TO-92.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76330QDBVRQ1 and MCP1703T-3002E/MB, LM2936DTX-3.0/NOPB uniquely combines automotive-grade reverse protection, 40 V operating input, and sub-20 μA IQ in a thermally efficient TO-252 package - making it irreplaceable in safety-critical always-on vehicle subsystems.

Availability

LM2936DTX-3.0/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and telematics control units requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned reliability.

Supply support for LM2936DTX-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of automotive qualification expertise.

The LM2936 product line delivers ultra-low-IQ LDOs engineered specifically for automotive battery-powered systems needing extended sleep-mode operation, reverse-polarity resilience, and wide-input-voltage regulation.

FAQ

What is the maximum input voltage for LM2936DTX-3.0/NOPB in continuous operation?

The LM2936DTX-3.0/NOPB has a maximum operating input voltage of +40 V for continuous use. While its absolute maximum survival rating is +60 V, exceeding 40 V risks safe-operating-area violation during output short-circuit events. For designs expecting transients above 40 V, external clamping remains necessary despite the device's −50 V reverse transient rating.

Does LM2936DTX-3.0/NOPB require an external shutdown pin?

No, LM2936DTX-3.0/NOPB does not include a shutdown pin. That feature is exclusive to the LM2936BM variant family (e.g., LM2936BMX-3.0/NOPB). The LM2936DTX-3.0/NOPB operates continuously when input voltage is within specification and has no enable or shutdown control - simplifying circuit design for always-on applications.

What output capacitor is required for stable operation of LM2936DTX-3.0/NOPB?

LM2936DTX-3.0/NOPB requires a 22 μF output capacitor with ESR between 0.3 Ω and 8 Ω. Ceramic capacitors meeting this ESR range - such as X7R or X5R types rated for the full −40°C to +125°C range - are recommended. Placement must be within 5 mm of the OUT and GND pins to minimize inductance and ensure transient response integrity.

Is LM2936DTX-3.0/NOPB qualified for automotive applications?

Yes, LM2936DTX-3.0/NOPB is designed and tested for automotive use, operating across −40°C to +125°C and complying with key stress requirements aligned to AEC-Q100. Its reverse battery protection (−50 V), 40 V operating input, and thermal shutdown make it suitable for body control, telematics, and sensor modules in passenger and commercial vehicles.

How does the thermal performance of LM2936DTX-3.0/NOPB compare to SOIC-8 variants?

LM2936DTX-3.0/NOPB in TO-252 (NDP) offers superior thermal resistance versus SOIC-8: θJA ≈136°C/W (vs. 140°C/W for SOIC-8 D package), with lower θJC enabling more efficient heat transfer to PCB copper. When mounted on ≥1 in² 2 oz. copper, its effective θJA improves further - supporting higher continuous current in space-constrained automotive layouts.