Monolithic Power Systems Inc. MPQ2019GN-AEC1-P

Overview

MPQ2019GN-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified adjustable-output linear regulator delivering up to 300mA with 10µA quiescent current, 3V–40V input range, and 1.25V–15V output adjustability. It integrates thermal shutdown, current limiting, power-good monitoring with programmable delay, and operates across –40°C to +150°C junction temperature-designed for automotive body control modules requiring ultra-low standby power.

For engineers reviewing the MPQ2019GN-AEC1-P datasheet, MPQ2019GN-AEC1-P pinout, MPQ2019GN-AEC1-P application, or MPQ2019GN-AEC1-P equivalent, key selection criteria include dropout voltage at 300mA (≤550mV), ±2% output accuracy over temperature, SOIC-8 EP thermal performance (θJA = 50°C/W), and PGDL capacitor-programmable delay timing (5–15ms).

Technical Context

The MPQ2019GN-AEC1-P employs a PMOS pass transistor architecture enabling low-dropout operation and reverse-voltage blocking via its intrinsic body diode-though external protection is recommended when VOUT > VIN. Its feedback loop regulates FB to 1.25V with 50nA input bias, supporting resistor-divider-based output programming while maintaining stability with ≥0.47µF ceramic output capacitance.

Power-good functionality uses an open-drain PG pin with 5% hysteresis and a dedicated PGDL pin that sources 3–9µA to charge an external capacitor, enabling precise delay setting (t_PGDL = C_PGDL × V_th/I_PGDL). EN control features 0.3V low-threshold and 1.8V high-threshold logic compatibility, with <1µA shutdown current.

Key Specifications

Pinout & Package

The MPQ2019GN-AEC1-P is housed in a thermally enhanced SOIC-8 EP (exposed pad) package, optimized for automotive PCB layouts with high copper pour on GND and exposed pad for efficient heat dissipation (θJC = 10°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE42754G and NCP163AMX330TBG, MPQ2019GN-AEC1-P uniquely combines AEC-Q100 Grade 1 qualification, adjustable output, programmable PG delay, and 10µA quiescent current-making it the only choice for automotive systems needing flexible, sequenced, ultra-low-power regulation.

Availability

MPQ2019GN-AEC1-P is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor node deployment, and medical portable equipment requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.

Supply support for MPQ2019GN-AEC1-P 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 belongs to MPS's automotive-grade linear regulator product line, engineered specifically for demanding automotive subsystems-including body electronics, ADAS sensors, and infotainment-where ultra-low I_Q, wide VIN, and AEC-Q100 compliance are mandatory.

FAQ

What is the minimum output capacitor value required for stability?

The MPQ2019GN-AEC1-P is stable with a minimum 0.47µF X5R or X7R ceramic capacitor on the output. Larger values (up to 22µF) improve load transient response and reduce noise, but are not required for basic stability. Tantalum or aluminum electrolytic capacitors are not recommended due to ESR sensitivity and aging effects.

Can the MPQ2019GN-AEC1-P be used with an input voltage below 3V?

No-the absolute minimum input voltage is 3V per datasheet specifications. Operation below 3V risks failure to regulate or undefined behavior due to internal bandgap and error amplifier limitations. The device includes UVLO that prevents startup below ~2.7V, ensuring reliable turn-on only within the specified 3V–40V range.

How is the power-good delay time calculated from the PGDL capacitor value?

Delay time t_PGDL (ms) = C_PGDL (nF) × 1.7V / I_PGDL (µA), where I_PGDL is 3–9µA (typical 5.5µA). For example, a 47nF capacitor yields 5–15ms delay. The PGDL pin charges the capacitor linearly until reaching 1.7V threshold, at which point PG asserts high-ensuring deterministic timing independent of load or input conditions.

Does the MPQ2019GN-AEC1-P require an input capacitor?

Yes-a 1µF to 10µF X5R or X7R ceramic capacitor is required between IN and GND. This minimizes input ripple, improves line transient response, and prevents oscillation during fast input voltage changes such as load dump. Placement within 3mm of the IN and GND pins is critical for optimal performance.

What happens during thermal shutdown, and how does recovery work?

When junction temperature exceeds 165°C, the internal thermal sensor triggers shutdown: the pass transistor turns off, output drops, and quiescent current falls to <1µA. Recovery occurs automatically once the die cools by ≥30°C (hysteresis), restoring regulation without external intervention-preventing latch-up while protecting against sustained overload.

Is the exposed pad electrically connected, and how must it be handled in layout?

Yes-the exposed pad is internally connected to GND and must be soldered to a dedicated GND plane with ≥4 thermal vias (0.3mm diameter) to maximize heat dissipation. Floating or unconnected pads cause thermal derating, increased θJA, and premature thermal shutdown-violating AEC-Q100 thermal test requirements.

Can the FB pin be left floating in fixed-output versions?

No-even in fixed-output variants like MPQ2019GN-33-AEC1, the FB pin remains internally connected to the resistor divider and must be either tied directly to OUT (for standard operation) or configured with external resistors for voltage adjustment. Leaving FB floating causes regulation failure and unpredictable output voltage.