Texas Instruments LM9036DT-5.0

Overview

LM9036DT-5.0 from Texas Instruments is a fixed-output 5.0 V, 50 mA ultra-low quiescent current linear voltage regulator in TO-252 (NDP) package, featuring ≤25 µA ground pin current at 0.1 mA load, 200 mV typical dropout at full load, and −45 V reverse transient protection. It is designed for automotive battery-supplied systems requiring stable low-power regulation under wide input voltage (up to 40 V) and extreme temperature (−40°C to +125°C) conditions.

For engineers reviewing the LM9036DT-5.0 datasheet, LM9036DT-5.0 pinout, LM9036DT-5.0 application, or LM9036DT-5.0 equivalent, key selection considerations include its PNP pass transistor architecture, thermal shutdown at 150°C, ±5% output tolerance over line/load/temperature, reverse battery protection, and compatibility with low-ESR ceramic or tantalum output capacitors (10–22 µF, 0.3–8 Ω ESR).

Technical Context

The LM9036DT-5.0 employs a PNP pass transistor topology enabling operation up to 40 V input while maintaining regulation down to 5.5 V - unlike many LDOs limited to <20 V. Its internal circuitry integrates short-circuit current limiting (65–250 mA), thermal shutdown, and reverse-battery protection without external components.

It delivers fixed 5.0 V output with ±5% accuracy across −40°C to +125°C, 0.1–50 mA load, and 5.5–40 V input. Dropout voltage remains ≤400 mV at 50 mA, and PSRR reaches −60 dB at 120 Hz, supporting noise-sensitive analog or microcontroller power domains in harsh environments.

Key Specifications

Pinout & Package

LM9036DT-5.0 is housed in a TO-252 (NDP) thermally enhanced surface-mount package with an exposed drain tab serving as the ground terminal. The package measures 6.73 mm × 6.22 mm × 2.55 mm (L × W × H) and features gull-wing leads compatible with standard reflow profiles (MSL Level-2, 260°C peak).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2936DT-5.0 and TPS76350DBVR, the LM9036DT-5.0 uniquely combines automotive-grade input range (40 V), reverse-battery survival (−45 V), and ultra-low IQ (<25 µA) in a thermally capable TO-252 package - making it irreplaceable for battery-connected modules requiring both longevity and ruggedness.

Availability

LM9036DT-5.0 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and battery-powered telematics systems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for LM9036DT-5.0 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 technologies, with decades of automotive qualification expertise and AEC-Q100-compliant product development.

The LM9036 series was engineered specifically for automotive subsystems demanding ultra-low standby current, high input voltage tolerance, and integrated fault protection - targeting body control, lighting, and sensor interface applications.

FAQ

What is the maximum input voltage the LM9036DT-5.0 can withstand continuously?

The LM9036DT-5.0 operates continuously up to 40 V input. While it survives −45 V reverse transients and up to +55 V survival-rated input, sustained operation above 40 V violates its absolute maximum operating rating and risks permanent damage. Designers must ensure system transients do not exceed +55 V and steady-state input remains ≤40 V.

Does the LM9036DT-5.0 require an output capacitor, and what type is recommended?

Yes, the LM9036DT-5.0 requires an output capacitor for stability. TI specifies 10–22 µF capacitance with effective series resistance (ESR) between 0.3 Ω and 8 Ω. Ceramic or tantalum capacitors meeting this ESR range are recommended; placement must be adjacent to the VOUT and GND pins to minimize loop inductance.

Can the LM9036DT-5.0 deliver its full 50 mA output current at 125°C ambient temperature?

No. At +125°C ambient, thermal limits reduce practical output current. With the TO-252 package on a standard board (θJA ≈ 125°C/W), power dissipation capability drops significantly. Using TI's formula PD = (TJmax − TA)/θJA, maximum dissipation falls to ~0.2 W - limiting usable output current well below 50 mA unless substantial copper area (e.g., 1 in² 2 oz Cu, θJA ≈ 50°C/W) is implemented.

Is the LM9036DT-5.0 pin-compatible with other variants in the LM9036 family?

Yes - all TO-252-packaged LM9036 variants (e.g., LM9036DT-3.3, LM9036DTX-5.0) share identical pinout (VIN–GND–VOUT) and footprint. However, output voltage and tape-and-reel packaging differ; electrical behavior (e.g., dropout, IQ) is consistent across the family, but output tolerance and regulation specs are voltage-specific.

How does the LM9036DT-5.0 handle reverse battery connection?

The LM9036DT-5.0 incorporates internal reverse-battery protection and withstands −45 V applied to VIN with GND grounded - eliminating the need for an external series diode. During reverse polarity, the device blocks conduction and draws negligible current, preserving battery charge and preventing damage to downstream circuitry.