Texas Instruments LM2936QMM-3.3/NOPB

Overview

LM2936QMM-3.3/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified ultralow-quiescent-current LDO voltage regulator delivering a fixed 3.3 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 operates from 5.5 V to 40 V input and integrates reverse-battery protection, −50 V transient immunity, and thermal shutdown - designed for always-on automotive subsystems such as body control modules and telematics.

For engineers reviewing the LM2936QMM-3.3/NOPB datasheet, LM2936QMM-3.3/NOPB pinout, LM2936QMM-3.3/NOPB application, or LM2936QMM-3.3/NOPB equivalent, key selection criteria include its 15 μA standby current, 40 V max operating voltage, 3.3 V ±3% output stability over −40°C to +125°C, TO-252-compatible thermal performance, and mandatory 22 µF/0.3–8 Ω ESR output capacitor requirement.

Technical Context

The LM2936QMM-3.3/NOPB uses a PNP pass transistor architecture enabling low dropout and inherent reverse-polarity protection without external components. Its internal bandgap reference and error amplifier maintain regulation across line (5.5–40 V), load (100 μA–50 mA), and temperature (−40°C to +125°C) with ±3% total output tolerance.

Thermal shutdown activates at ~160°C junction temperature and cycles autonomously until ambient conditions normalize; short-circuit current limiting caps peak output at 65–250 mA depending on conditions. No undervoltage lockout or overvoltage shutdown is implemented - regulation begins when VIN exceeds VOUT + 1 V.

Key Specifications

Pinout & Package

LM2936QMM-3.3/NOPB is packaged in an 8-pin VSSOP (DGK) with 3.00 mm × 3.00 mm body size and exposed thermal pad. Pin 1 = OUT, Pin 2 = GND, Pin 3 = GND, Pin 4 = NC, Pin 5 = NC, Pin 6 = NC, Pin 7 = GND, Pin 8 = IN. All GND pins are internally connected and must be tied to system ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7B6733QPWPRQ1 and MCP1703T-3302E/MB, LM2936QMM-3.3/NOPB uniquely combines AEC-Q100 Grade 1 qualification, −50 V transient survival, and ≤15 μA quiescent current in a single monolithic device - making it the only drop-in solution for battery-connected automotive subsystems demanding both ultra-low leakage and robust fault tolerance.

Availability

LM2936QMM-3.3/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, telematics gateways, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM2936QMM-3.3/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 specializing in analog, embedded processing, and automotive-grade power management ICs with over 50 years of automotive qualification experience.

The LM2936Q product line delivers ultralow-IQ LDOs engineered specifically for automotive always-on domains - balancing quiescent current, fault resilience, and thermal robustness for battery-sensitive ECUs.

FAQ

What is the maximum input voltage the LM2936QMM-3.3/NOPB can withstand continuously?

The LM2936QMM-3.3/NOPB supports continuous operation up to 40 V input voltage. It also survives −50 V reverse-battery transients and −80 V short-duration spikes per ISO 7637-2. Exceeding 40 V continuously risks thermal overload due to power dissipation limits, even though the absolute maximum rating is 60 V for certain variants - the LM2936QMM-3.3/NOPB itself is rated for 40 V max continuous operation per its datasheet specifications.

Does the LM2936QMM-3.3/NOPB require an input capacitor?

The LM2936QMM-3.3/NOPB does not mandate an input capacitor for basic stability, but a 100 nF ceramic capacitor is recommended if the regulator is located more than 3 inches from the main power supply filter capacitor. This minimizes high-frequency noise coupling and improves transient response. The device's reverse-battery protection and internal design eliminate the need for input polarity protection diodes.

What output capacitor specifications are mandatory for stable operation of the LM2936QMM-3.3/NOPB?

LM2936QMM-3.3/NOPB requires a minimum 22 µF output capacitor with an equivalent series resistance (ESR) between 0.3 Ω and 8 Ω across the full operating temperature range. Ceramic capacitors may be used only if a series resistor (typically 500 mΩ–1 Ω) is added to meet the ESR requirement. Failure to meet either capacitance or ESR criteria will cause oscillation and loss of regulation.

Is the LM2936QMM-3.3/NOPB pin-compatible with other LM2936Q variants?

No - LM2936QMM-3.3/NOPB uses the 8-pin VSSOP (DGK) package with specific pinout (IN on Pin 8, OUT on Pin 1, three GND pins). It is not pin-compatible with SOIC (D), TO-252 (NDP), or SOT-223 (DCY) variants, which have different pin counts and assignments. Substituting packages requires PCB layout revision and thermal validation due to differing RθJA and pad configurations.

How does the LM2936QMM-3.3/NOPB behave during thermal shutdown?

When the LM2936QMM-3.3/NOPB junction temperature reaches ~160°C, thermal shutdown disables the output. Once the die cools by approximately 10°C, regulation automatically resumes. This cycling continues until the root cause - such as excessive input-output differential, high ambient temperature, or insufficient copper area - is corrected. The VSSOP package's RθJA of 173.4°C/W means adequate PCB copper is essential to avoid repeated cycling in high-power applications.