Monolithic Power Systems Inc. MPQ2019GN-5-AEC1

Overview

MPQ2019GN-5-AEC1 from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified 40V input, 300mA adjustable/fixed-output linear regulator with 10µA quiescent current, ±2% output voltage accuracy over temperature, and programmable power-good delay. It operates across –40°C to +125°C ambient and supports automotive body control modules requiring stable low-power biasing under wide battery voltage transients (e.g., cold-crank to load-dump).

For engineers reviewing the MPQ2019GN-5-AEC1 datasheet, MPQ2019GN-5-AEC1 pinout, MPQ2019GN-5-AEC1 application, or MPQ2019GN-5-AEC1 equivalent, key selection criteria include its 40V max input rating, SOIC-8 EP thermal performance (θJA = 50°C/W), integrated thermal shutdown (165°C), and PGDL-programmable power-good assertion timing - critical for microcontroller reset sequencing in automotive ECUs.

Technical Context

The MPQ2019GN-5-AEC1 implements a PMOS pass transistor architecture enabling ultra-low dropout (480mV @ 300mA, VOUT=5V) and reverse-voltage protection awareness via external diode recommendation. Its internal 1.25V reference feeds a precision error amplifier controlling output regulation with 1.25V FB threshold and <50nA FB input current.

Power-good functionality uses an open-drain PG pin with 5% hysteresis and user-programmable delay (5–15ms via 47nF on PGDL), while EN logic-level control (VIH = 1.8V, VIL = 0.3V) enables system-level enable/disable coordination. Thermal shutdown includes 30°C hysteresis for reliable recovery after overtemperature events.

Key Specifications

Pinout & Package

MPQ2019GN-5-AEC1 is housed in a thermally enhanced SOIC-8 EP (exposed pad) package, optimized for automotive PCBs with high copper pour area under the exposed pad for θJC = 10°C/W conduction cooling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5V automotive LDO applications.

Compared with TPS7B6750QDDARQ1 and NCP163AMX500TBG, MPQ2019GN-5-AEC1 uniquely combines AEC-Q100 Grade 1 qualification, 40V input capability, programmable PG delay, and SOIC-8 EP thermal performance - making it the only choice for direct-battery 5V regulation in modern automotive ECUs requiring deterministic power sequencing and thermal resilience.

Availability

MPQ2019GN-5-AEC1 is available at Aetrix Electronics and suitable for automotive electronic control units, ADAS camera modules, and telematics gateways requiring stable component supply under AEC-Q100 compliance and extended temperature operation.

Supply support for MPQ2019GN-5-AEC1 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ2019 product line targets automotive-grade power management, delivering high-input-voltage linear regulators with ultra-low IQ, integrated protection, and AEC-Q100 qualification for body electronics and safety-critical subsystems.

FAQ

What is the maximum allowable input voltage for MPQ2019GN-5-AEC1?

The absolute maximum input voltage is +42V, but the recommended operating range is 3V to 40V. Exceeding 40V risks violating the device's safe operating area during transients like ISO 7637-2 Pulse 5a (load dump), even though the absolute rating permits brief 42V exposure. Designers should ensure clamping or filtering limits sustained input to ≤40V.

Can MPQ2019GN-5-AEC1 be used without connecting the PGDL pin?

Yes - PGDL can be left floating if programmable power-good delay is not required. In that case, the PG pin asserts high immediately upon VOUT reaching 92–96% of 5V, with no intentional delay. The internal PGDL charging current (3–9µA) is disabled when the pin is open, so no leakage or instability occurs.

Is the FB pin functional in the MPQ2019GN-5-AEC1 fixed-output variant?

No - FB is internally connected to the 5V feedback divider and must remain unaltered. The datasheet explicitly states FB is "not used" in fixed-output versions and does not support external adjustment. Connecting external resistors to FB will disrupt regulation and is prohibited.

How does thermal performance differ between MPQ2019GN-5-AEC1 and standard commercial MPQ2019GN-5?

Both share identical SOIC-8 EP packaging and thermal resistance specs (θJA = 50°C/W, θJC = 10°C/W), but MPQ2019GN-5-AEC1 undergoes additional automotive qualification testing (e.g., HTOL at 150°C, -40°C to +125°C cycling) confirming long-term thermal reliability under harsh conditions - not just steady-state numbers.

Does MPQ2019GN-5-AEC1 require an input capacitor, and what type is recommended?

Yes - a 1µF to 10µF X5R or X7R ceramic capacitor is required between IN and GND, placed within 5mm of the pin. This stabilizes input impedance during line transients and prevents oscillation. Larger values (e.g., 4.7µF) improve load-dump immunity; Y5V dielectrics are discouraged due to capacitance drift over temperature.

What failure modes does the internal current limit protect against?

The 600–1350mA current limit protects against short-circuit faults, excessive capacitive loads during startup, and output overloads. When triggered, the device enters constant-current foldback mode - maintaining regulated voltage until the fault clears or thermal shutdown activates - preventing MOSFET destruction and PCB trace damage.

Is reverse-voltage protection built-in, and what is the recommended external solution?

No - the internal PMOS pass transistor includes a body diode that conducts from OUT to IN if VOUT > VIN (e.g., backup battery scenario), risking uncontrolled reverse current. MPS recommends placing a Schottky diode (e.g., 1N5819) anode-to-IN, cathode-to-VIN to block reverse conduction while minimizing forward drop.