Texas Instruments LM9036QMMX-5.0/NOPB

Overview

LM9036QMMX-5.0/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified ultra-low quiescent current linear voltage regulator delivering fixed 5.0 V output at up to 50 mA, with ground pin current ≤25 µA at 0.1 mA load, dropout voltage typically 200 mV at 50 mA, and ±5% output tolerance over line, load, and temperature (−40°C to +125°C). It serves as a primary power supply for always-on automotive subsystems including body control modules and sensor interfaces.

For engineers reviewing the LM9036QMMX-5.0/NOPB datasheet, LM9036QMMX-5.0/NOPB pinout, LM9036QMMX-5.0/NOPB application, or LM9036QMMX-5.0/NOPB equivalent, key selection criteria include its 40 V maximum operating voltage, −45 V reverse transient protection, internal thermal shutdown, short-circuit current limiting, and compatibility with low-ESR output capacitors (0.3–8 Ω) in space-constrained VSSOP-8 layouts.

Technical Context

The LM9036QMMX-5.0/NOPB employs a PNP pass transistor architecture enabling low-dropout operation and inherent reverse-battery protection. Its regulation loop maintains stable 5.0 V output across input voltages from 5.5 V to 40 V while sustaining ultra-low ground current-≤25 µA at light loads-critical for battery longevity in automotive keep-alive circuits.

Thermal protection activates at ~150°C junction temperature, and internal short-circuit current limiting caps peak output at 65–250 mA depending on conditions. The device survives −45 V transients and operates reliably within its specified −40°C to +125°C ambient range without external compensation components.

Key Specifications

Pinout & Package

VSSOP-8 (DGK0008A) package with exposed thermal pad (PowerPAD™), 3.0 mm × 3.0 mm footprint, 1.1 mm max height, and lead finish Sn (RoHS compliant). Pin 1 located at top-left corner per JEDEC MO-187 standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-I_Q automotive LDO applications.

Compared with TLV73350PDBVR and TPS7B6750QPWPRQ1, the LM9036QMMX-5.0/NOPB uniquely balances ultra-low I_Q, −45 V reverse transient capability, and AEC-Q100 Grade 1 qualification in a compact VSSOP-8 package-making it optimal for cost-sensitive, space-constrained battery-supplied automotive nodes where reliability under harsh electrical conditions is non-negotiable.

Availability

LM9036QMMX-5.0/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and battery-powered telemetry systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for LM9036QMMX-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 connectivity technologies, with decades of automotive-grade product development and manufacturing excellence.

The LM9036Q series was designed specifically for ultra-low-power, high-reliability automotive power management-targeting always-on subsystems where quiescent current, reverse-battery survivability, and thermal robustness are critical design constraints.

FAQ

What is the maximum input voltage rating for the LM9036QMMX-5.0/NOPB?

The LM9036QMMX-5.0/NOPB has a maximum operational input voltage of 40 V and a survival rating of +55 V / −45 V. Operation above 40 V risks exceeding safe operating area limits of the internal PNP pass device, potentially causing catastrophic failure. Transient spikes beyond −45 V or +55 V must be clamped externally to avoid damage to the LM9036QMMX-5.0/NOPB.

Does the LM9036QMMX-5.0/NOPB require an external capacitor for stability?

Yes, the LM9036QMMX-5.0/NOPB requires a minimum 10 µF output capacitor with ESR between 0.3 Ω and 8 Ω, placed as close as possible to pins 2 (GND) and 3 (OUT). Ceramic or tantalum capacitors meeting this ESR range ensure phase margin and prevent oscillation. Input capacitance (≥10 µF) is also recommended within 5 mm of pin 1 (IN) for transient suppression.

Is the LM9036QMMX-5.0/NOPB pin-compatible with other variants in the LM9036Q family?

Yes, all LM9036Q variants-including LM9036QMMX-3.3/NOPB and LM9036QMMX-5.0/NOPB-share identical VSSOP-8 (DGK) pinout and package dimensions. Output voltage is factory-set; no external resistors or configuration pins are used. Swapping between 3.3 V and 5.0 V versions requires only a BOM change and verification of downstream voltage tolerance.

What thermal performance can be expected from the LM9036QMMX-5.0/NOPB in a standard PCB layout?

In a typical layout with 1-inch² of 2 oz. copper connected to the exposed thermal pad, the LM9036QMMX-5.0/NOPB achieves θJA ≈ 200°C/W. At 50 mA load and 14 V input, power dissipation is ~450 mW, resulting in ~90°C junction rise above ambient. For continuous 50 mA operation at 125°C ambient, additional copper area or airflow is required to avoid thermal shutdown.

How does the enable (EN) pin function on the LM9036QMMX-5.0/NOPB?

The EN pin (Pin 7) controls regulator operation: applying ≥2.0 V enables output regulation, while ≤0.8 V disables the output and reduces ground current to <1 µA. The EN pin has hysteresis and internal pull-down; no external pull-down resistor is needed. This feature supports controlled power sequencing and deep-sleep states in automotive microcontrollers interfacing with the LM9036QMMX-5.0/NOPB.