Monolithic Power Systems Inc. MPQ2019GN-5

Overview

MPQ2019GN-5 from Monolithic Power Systems is a 40V-input, 5V-fixed-output linear regulator with AEC-Q100 Grade 1 qualification, 300mA continuous output current, 10µA quiescent current, and SOIC-8 EP package. It delivers stable 5V power to automotive microcontrollers and battery-powered sensors under wide input voltage (3–40V) and extreme temperature (−40°C to +125°C ambient) conditions.

For engineers reviewing the MPQ2019GN-5 datasheet, MPQ2019GN-5 pinout, MPQ2019GN-5 application, or MPQ2019GN-5 equivalent, key selection criteria include its ±2% output accuracy at 5V, programmable power-good delay (5–15ms), thermal shutdown at 165°C, low-dropout operation (480mV @ 300mA), and compatibility with 0.47µF ceramic output capacitors.

Technical Context

The MPQ2019GN-5 integrates a PMOS pass transistor with internal feedback reference (1.25V) and precision bandgap circuitry to regulate output to exactly 5.0V ±2% across load (5–300mA), line (6–40V), and temperature (−40°C to +125°C). Its EN pin enables digital on/off control with 0.3V/1.8V logic thresholds, while PG and PGDL pins provide configurable power-good signaling with 5% hysteresis and capacitor-programmable delay.

Protection architecture includes foldback current limiting (600–1350mA peak), thermal shutdown with 30°C hysteresis, and short-circuit robustness. The SOIC-8 EP package features an exposed thermal pad tied to GND, enabling 2.5W power dissipation at 25°C ambient and θJA = 50°C/W on a 4-layer PCB.

Key Specifications

Pinout & Package

MPQ2019GN-5 is housed in a SOIC-8 EP (exposed pad) package with 1.27mm pitch, JEDEC MS-012 BA compliant footprint, and thermal pad soldered to GND plane for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Compared with TPS7B6750QDDARQ1 and NCV8664ST50T3G, MPQ2019GN-5 uniquely combines AEC-Q100 Grade 1 compliance, 300mA output, programmable PG delay, and ultra-low 12µA quiescent current - making it optimal for automotive subsystems requiring both high reliability and precise power sequencing.

Availability

MPQ2019GN-5 is available at Aetrix Electronics and suitable for automotive body electronics, industrial wireless sensors, portable medical diagnostics, and telematics control units requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.

Supply support for MPQ2019GN-5 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 and industrial applications requiring high-input-voltage LDOs with ultra-low quiescent current, AEC-Q100 qualification, and integrated power-good signaling - addressing stringent requirements for always-on, battery-sensitive systems.

FAQ

What is the minimum input voltage required for MPQ2019GN-5 to maintain 5V output at 300mA?

The MPQ2019GN-5 requires a minimum input voltage of 5.48V to sustain 5V output at 300mA load, based on its maximum dropout voltage of 480mV at that condition. This ensures reliable operation during automotive cold-cranking events where battery voltage may dip to ~5.5V.

Can the FB pin be left unconnected in the MPQ2019GN-5 fixed-output variant?

Yes - the FB pin is internally connected to the 5V feedback divider (3MΩ/1MΩ) and must be left floating in the MPQ2019GN-5 configuration. Connecting it externally would disrupt the factory-trimmed regulation and cause output voltage error.

How is the power-good delay time calculated for MPQ2019GN-5?

The PG delay time is calculated using t_PGDL(ms) = C_PGDL(nF) × V_{th_PGDL}(1.7V) ÷ I_PGDL(µA), where I_PGDL is 3–9µA (typ. 5.5µA). For example, a 47nF capacitor yields ~10ms delay, matching the datasheet's 5–15ms specification range.

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

Yes - a 1µF to 10µF X5R or X7R ceramic capacitor is required between IN and GND, placed as close as possible to the pin. This suppresses high-frequency noise and improves line transient response; values ≥2.2µF are recommended for automotive environments with severe ripple.

Is thermal derating required when operating MPQ2019GN-5 at 125°C ambient temperature?

Yes - at TA = 125°C, maximum allowable power dissipation drops to 1.25W (PD_MAX = (150°C − 125°C)/50°C/W). With 5V output and 300mA load, power dissipation is 1.5W (VIN=13.5V), so VIN must be reduced or heatsinking enhanced to avoid thermal shutdown.

What protection features are active during short-circuit conditions?

During output short-circuit, MPQ2019GN-5 activates foldback current limiting (600–1350mA peak), thermal shutdown (165°C), and automatic recovery after cooldown. The device does not latch off - it cycles on/off until fault is removed, preventing permanent damage.

Can MPQ2019GN-5 be used in non-automotive industrial applications despite AEC-Q100 qualification?

Yes - AEC-Q100 Grade 1 qualification certifies extended temperature operation (−40°C to +125°C), robust ESD immunity (4kV HBM), and reliability testing beyond standard industrial requirements, making it suitable for harsh industrial environments such as factory automation and energy metering.