Texas Instruments LM9036DTX-5.0/NOPB

Overview

LM9036DTX-5.0/NOPB from Texas Instruments is a fixed 5.0V, 50mA ultra-low quiescent current linear voltage regulator in TO-252 (NDP) package, featuring ≤25µA ground pin current at 0.1mA load, 200mV typical dropout at full load, ±5% output tolerance over line/load/temperature, and −45V reverse transient protection - designed for automotive battery-powered systems requiring long standby life.

For engineers reviewing the LM9036DTX-5.0/NOPB datasheet, LM9036DTX-5.0/NOPB pinout, LM9036DTX-5.0/NOPB application, or LM9036DTX-5.0/NOPB equivalent, key selection criteria include ultra-low IQ performance under light loads, reverse-battery robustness, thermal shutdown behavior in constrained PCB layouts, and compatibility with low-ESR ceramic output capacitors (0.3–8Ω).

Technical Context

The LM9036DTX-5.0/NOPB uses a PNP pass transistor architecture enabling low dropout operation while maintaining regulation up to 40V input. Its internal circuitry integrates short-circuit current limiting (65–250mA), thermal shutdown (typically 150°C), and reverse-battery protection down to −45V - eliminating need for external diodes in automotive environments.

Unlike standard LDOs, it sustains regulation across −40°C to +125°C ambient without derating below 50mA up to 29.5V input at 85°C (with 1-in² copper pad), and delivers stable 5.0V output with ≤30mV line/load regulation and −60dB ripple rejection at 120Hz - critical for noise-sensitive analog subsystems.

Key Specifications

Pinout & Package

LM9036DTX-5.0/NOPB is housed in a 3-pin TO-252 (NDP) thermally enhanced surface-mount package with exposed drain tab for PCB heat sinking. The package measures 6.73 × 6.22 mm with 2.55 mm max height and requires thermal pad layout per TI SLMA002/SLMA004 guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-IQ linear regulator applications.

Compared with TPS76350DBVR and MCP1703T-5002E/MB, LM9036DTX-5.0/NOPB uniquely balances automotive-grade reverse protection (−45V), ultra-low 25µA IQ, and TO-252 thermal performance - making it the only option qualified for direct 12V battery connection in AEC-Q100-adjacent applications without external protection components.

Availability

LM9036DTX-5.0/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, telematics standby power, and engine control auxiliary rails requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned reliability.

Supply support for LM9036DTX-5.0/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 power management ICs, with decades of automotive qualification expertise and broad manufacturing scale.

The LM9036DTX-5.0/NOPB belongs to TI's automotive-optimized linear regulator product line, engineered specifically for battery-powered vehicle subsystems demanding ultra-low quiescent current, reverse-battery resilience, and extended temperature operation.

FAQ

What is the maximum input voltage for continuous operation of the LM9036DTX-5.0/NOPB?

The LM9036DTX-5.0/NOPB supports continuous operation up to 40V DC input. While it can survive transient inputs up to +55V and −45V, sustained operation above 40V violates its absolute maximum rating and risks permanent damage. For automotive applications, this 40V limit safely covers alternator overshoot and load-dump conditions when combined with external clamping.

Does the LM9036DTX-5.0/NOPB require an external capacitor for stability, and what are the specifications?

Yes, the LM9036DTX-5.0/NOPB requires an output bypass capacitor with 10–22µF capacitance and ESR between 0.3Ω and 8Ω for guaranteed stability. Ceramic capacitors meeting these ESR constraints are preferred. Placement must be within 5mm of the VOUT and GND pins, and the capacitor must be rated for the full operating temperature range (−40°C to +125°C).

How does the thermal performance of LM9036DTX-5.0/NOPB compare between standard PCB layout and optimized layout?

With standard FR-4 PCB (no thermal pad), LM9036DTX-5.0/NOPB has θJA ≈125°C/W. Adding a 1-inch² 2oz copper pad under the exposed thermal tab reduces θJA to ~50°C/W. This improvement allows full 50mA output at +85°C ambient, whereas the unoptimized layout limits usable current to ~20mA at the same temperature to avoid thermal shutdown.

Can LM9036DTX-5.0/NOPB replace LM9036DT-5.0/NOPB in existing designs?

Yes, LM9036DTX-5.0/NOPB is functionally and pin-compatible with LM9036DT-5.0/NOPB - both use identical TO-252 (NDP) package, electrical specs, and thermal characteristics. The "X" suffix denotes tape-and-reel packaging (2500 units/reel) versus tube packaging (75 units/tube), with no electrical or mechanical differences affecting board-level design or performance.

What protection features are integrated into the LM9036DTX-5.0/NOPB?

The LM9036DTX-5.0/NOPB integrates four key protections: (1) reverse-battery protection to −45V, (2) internal short-circuit current limiting (65–250mA), (3) thermal shutdown at ~150°C junction temperature, and (4) safe operating area (SOA) protection against high-voltage transients. No external components are needed to implement these functions.