Monolithic Power Systems Inc. MPQ2019GN-33-AEC1-P

Overview

MPQ2019GN-33-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, 3V–40V input, 3.3V fixed-output linear regulator delivering up to 300mA with 10µA quiescent current, ±2% output accuracy over temperature, and integrated power-good signaling with programmable delay. It serves as a primary low-power supply for automotive microcontrollers, body control modules, and sensor interfaces requiring stable voltage under wide-input battery conditions.

For engineers reviewing the MPQ2019GN-33-AEC1-P datasheet, MPQ2019GN-33-AEC1-P pinout, MPQ2019GN-33-AEC1-P application, or MPQ2019GN-33-AEC1-P equivalent, key selection criteria include its 480mV dropout at 300mA/3.3V, thermal shutdown at 165°C, PGDL-programmable power-good assertion delay (5–15ms), and SOIC-8 EP package with exposed pad for automotive-grade thermal reliability.

Technical Context

The MPQ2019GN-33-AEC1-P implements a PMOS-based LDO architecture with internal feedback reference (1.25V) and precision bandgap regulation. Its EN pin enables digital on/off control with 0.3V/1.8V logic thresholds, while the open-drain PG pin asserts high when VOUT reaches 92% of nominal (3.3V), with 5% hysteresis and user-configurable timing via external capacitor on PGDL.

It integrates current limiting (~1000mA peak), thermal shutdown with 30°C hysteresis, and short-circuit protection. The device operates across –40°C to +150°C junction temperature and maintains stability with ≥0.47µF ceramic output capacitance-enabling compact, low-BOM-count designs in space-constrained automotive ECUs.

Key Specifications

Pinout & Package

MPQ2019GN-33-AEC1-P is housed in a SOIC-8 EP (Exposed Pad) package. The exposed thermal pad must be soldered to a dedicated ground plane for effective heat dissipation and EMI reduction in automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE42754G and NCP163AMX330TBG, MPQ2019GN-33-AEC1-P uniquely combines AEC-Q100 Grade 1, 3.3V fixed output, programmable PG delay, and SOIC-8 EP thermal performance-making it optimal for modern automotive domains requiring functional safety-aware power sequencing.

Availability

MPQ2019GN-33-AEC1-P is available at Aetrix Electronics and suitable for automotive body electronics, instrument clusters, and telematics control units requiring stable component supply under AEC-Q100 compliance and long-lifecycle assurance.

Supply support for MPQ2019GN-33-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 mixed-signal ICs for power management, motion control, and automotive applications.

The MPQ2019 product line delivers high-voltage, ultra-low-IQ linear regulators engineered specifically for automotive subsystems where battery voltage variation, thermal constraints, and functional safety are critical design factors.

FAQ

What is the minimum input voltage required for MPQ2019GN-33-AEC1-P to maintain 3.3V output at 300mA?

The dropout voltage is 480mV at 300mA and +25°C, so minimum input is 3.3V + 0.48V = 3.78V. At elevated temperatures or full load, worst-case dropout reaches 640mV, requiring VIN ≥ 3.94V. This ensures reliable operation during automotive cold-crank events where battery voltage may dip to 4.5V.

Can the PG pin be left unconnected if power-good monitoring is not used?

Yes-the PG pin is an open-drain output and may be left floating if unused. However, leaving it unconnected disables fault detection capability. For robust designs, tie PG to VOUT via a 100kΩ pull-up resistor even if not actively monitored, to prevent noise-induced false resets.

How does the PGDL capacitor value affect power-good assertion timing?

PGDL charges at 5.5µA typical. With C_PGDL = 47nF, PG asserts high after ~10ms. Timing follows t_PGDL(ms) = (C_PGDL × 1.7V) / 5.5µA. For example, 22nF yields ~7ms delay; 100nF yields ~31ms-allowing precise alignment with MCU bootloader timeouts.

Is external reverse-voltage protection required when using MPQ2019GN-33-AEC1-P?

Yes-if the output can be held above input (e.g., backup battery present), the internal PMOS body diode conducts reverse current with no limit. An external Schottky diode (cathode to IN, anode to GND) is recommended to block reverse current and prevent device damage during fault conditions.

What is the maximum allowable power dissipation in SOIC-8 EP at +85°C ambient?

With θ_JA = 50°C/W, PD_MAX = (150°C − 85°C) / 50 = 1.3W. At 300mA and 3.3V output, power dissipated is (VIN − 3.3V) × 0.3A. For VIN = 13.5V, PD = 3.06W-exceeding limit. Therefore, thermal pad soldering to ≥2 cm² copper area is mandatory to reduce θ_JA and sustain full load.

Does MPQ2019GN-33-AEC1-P support adjustable output voltage?

No-this variant is factory-trimmed for fixed 3.3V output. The FB pin is internally connected to the 1.64MΩ/1MΩ divider and must remain unconnected. For adjustable versions, use MPQ2019GN-AEC1 (1.25V–15V) with external resistor divider on FB.

How does the EN pin behave during power-up and shutdown sequences?

EN has 0.3V low threshold and 1.8V high threshold. When EN rises above 1.8V, the regulator starts with soft-start behavior; when EN falls below 0.3V, it shuts down, reducing supply current to <1µA. Connecting EN to VIN provides automatic startup, while MCU-controlled EN enables selective subsystem power gating.