Monolithic Power Systems Inc. MPQ2019GN-P

Overview

MPQ2019GN-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified adjustable-output linear regulator delivering up to 300mA output current with 10µA quiescent supply current, 3V–40V input range, and ±2% output voltage accuracy over temperature. It integrates programmable power-good delay, thermal shutdown, short-circuit protection, and operates across –40°C to +150°C junction temperature - deployed in automotive body control modules requiring ultra-low-power standby regulation.

For engineers reviewing the MPQ2019GN-P datasheet, MPQ2019GN-P pinout, MPQ2019GN-P application, or MPQ2019GN-P equivalent, this device supports precise low-noise biasing of 12-bit+ ADCs, enables fail-safe power sequencing in battery-backed systems, and provides validated PG timing control for microcontroller reset coordination under wide-input transients.

Technical Context

The MPQ2019GN-P uses a PMOS pass transistor architecture enabling low-dropout operation (420mV @ 300mA, VOUT=5V) and reverse-voltage blocking via internal body diode management. Its feedback loop regulates FB to 1.25V with 50nA input bias, supporting external resistor-divider programming from 1.25V to 15V.

Power-good assertion is controlled by an open-drain MOSFET with 89–97% VFB rising threshold and 5% hysteresis; delay time is set by external capacitor on PGDL pin using 3–9µA charging current and 1.7V threshold - enabling configurable startup hold-off from 5ms to 15ms.

Key Specifications

Pinout & Package

MPQ2019GN-P is housed in a SOIC-8 EP (exposed pad) package optimized for thermal dissipation in automotive environments. The exposed pad must be soldered to a dedicated ground plane for θJA = 50°C/W performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE42754G and TPS7B8133QDGNRQ1, MPQ2019GN-P uniquely combines adjustable output (1.25–15V), 10µA IQ, and programmable PG delay in SOIC-8 EP - making it optimal for space-constrained, multi-voltage automotive subsystems where flexibility and ultra-low standby power are mandatory.

Availability

MPQ2019GN-P is available at Aetrix Electronics and suitable for automotive body electronics, industrial battery-backed controllers, portable medical imaging, and smart energy metering requiring stable component supply with AEC-Q100 compliance and long-lifecycle assurance.

Supply support for MPQ2019GN-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 harsh-environment applications demanding ultra-low quiescent current, wide input range, and robust fault protection - targeting body electronics, ADAS sensors, and infotainment power rails.

FAQ

What is the minimum output capacitor value required for stability?

The MPQ2019GN-P is stable with a minimum 0.47µF X5R/X7R ceramic capacitor on the output. This low requirement reduces board area and cost versus legacy LDOs needing ≥10µF tantalum capacitors. Larger values (up to 22µF) improve load transient response and noise filtering, especially in high-precision analog applications.

How does the PGDL pin function, and what capacitor value achieves a 10ms delay?

The PGDL pin accepts an external capacitor to program power-good assertion delay. Using the formula tPGDL (ms) = (CPGDL × Vth_PGDL) / IPGDL with Vth_PGDL = 1.7V and IPGDL = 5.5µA (typical), a 47nF capacitor yields ~10ms delay. This enables precise coordination of MCU reset timing after input stabilization, avoiding premature wake-up during battery recovery.

Can the MPQ2019GN-P be used with a 2.5V fixed output?

Yes - while MPQ2019GN-P is the adjustable version, the MPQ2019 family includes factory-trimmed fixed-output variants (e.g., MPQ2019GN-25). For custom 2.5V output on MPQ2019GN-P, use R1 = 1.0MΩ and R2 = 1MΩ in the FB divider to achieve VOUT = 1.25V × (1 + R1/R2) = 2.5V, maintaining 1.215µA minimum FB bias current.

What thermal derating applies above 25°C ambient?

With θJA = 50°C/W and TJ(MAX) = 150°C, maximum continuous power dissipation drops linearly: PD(MAX) = (150 – TA)/50 W. At TA = 85°C, PD(MAX) = 1.3W. To sustain 300mA output at 5V (1.5W dissipation), reduce VIN to ≤12V or enhance PCB copper area - the exposed pad must connect directly to ≥2cm² internal ground plane for rated thermal performance.

Is reverse-voltage protection required when the output is held higher than input?

Yes - the internal PMOS pass transistor's body diode conducts from OUT to IN if VOUT > VIN, causing uncontrolled reverse current. An external Schottky diode (e.g., 1N5819) between IN and GND is recommended in battery-backup configurations to block reverse conduction and prevent IC damage during input disconnection or grounding.

Does the MPQ2019GN-P support feed-forward capacitor implementation?

Yes - a 2.2nF ceramic capacitor placed across the upper FB divider resistor (R1) significantly reduces output noise, particularly beneficial for 12-bit+ ADCs and precision op-amp circuits. This feed-forward path bypasses high-frequency noise around the error amplifier, improving PSRR above 10kHz without affecting DC regulation or stability.

What is the EN pin behavior during power-up, and how should it be configured?

The EN pin enables the regulator when pulled above 1.8V and disables it below 0.3V. For automatic start-up, connect EN directly to VIN - eliminating external pull-up components. If controlled sequencing is needed, drive EN with a GPIO or supervisor IC; EN input current remains ≤0.5µA, minimizing loading on control signals.