Monolithic Power Systems Inc. MPQ2019GN-33-AEC1

Overview

MPQ2019GN-33-AEC1 from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified 3.3V fixed-output linear regulator with 3V–40V input range, 300mA continuous output current, 10µA quiescent current, and ±2% output voltage accuracy over temperature - designed for automotive body electronics, infotainment power rails, and ultra-low-power microcontroller supply in harsh environments.

For engineers reviewing the MPQ2019GN-33-AEC1 datasheet, MPQ2019GN-33-AEC1 pinout, MPQ2019GN-33-AEC1 application, or MPQ2019GN-33-AEC1 equivalent, this part delivers automotive-grade reliability with programmable power-good delay, thermal shutdown, short-circuit protection, and stable operation using only a 0.47µF ceramic output capacitor.

Technical Context

The MPQ2019GN-33-AEC1 employs a PMOS pass transistor architecture enabling low dropout (480mV max at 300mA, 3.3V out) and high input voltage tolerance up to 40V. Its internal feedback reference is trimmed to 1.25V, with fixed 3.3V output achieved via integrated resistor divider (R1_IN = 1.64MΩ, R2_IN = 1MΩ).

It integrates a dedicated open-drain Power Good (PG) output with 5–15ms programmable assertion delay via external PGDL capacitor, plus EN control with 0.3V/1.8V logic thresholds. Thermal shutdown activates at 165°C with 30°C hysteresis, and current limiting trips at 600–1350mA peak.

Key Specifications

Pinout & Package

MPQ2019GN-33-AEC1 is housed in a SOIC-8 EP (exposed pad) package optimized for thermal dissipation in automotive PCBs. The exposed thermal pad must be soldered to a solid ground plane for θJA ≤ 50°C/W performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7B6733QPWPRQ1 and NCV8664D33R2G, MPQ2019GN-33-AEC1 uniquely combines AEC-Q100 Grade 1 rating, programmable PG delay, and ultra-low 12µA quiescent current - making it optimal for next-gen vehicle domains requiring precise power sequencing and extended battery-off endurance.

Availability

MPQ2019GN-33-AEC1 is available at Aetrix Electronics and suitable for automotive body electronics, telematics control units, and ADAS sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPQ2019GN-33-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 and industrial applications demanding wide-input, low-I_Q, and AEC-Q100-compliant linear regulators - specifically engineered for battery-powered and harsh-environment systems where reliability and efficiency are non-negotiable.

FAQ

What is the minimum input voltage required to maintain 3.3V output at 300mA?

The maximum dropout voltage is 640mV at 300mA and +25°C. Therefore, VIN must be ≥ 3.94V to sustain 3.3V output under full load. At −40°C, dropout increases slightly; derating to 4.0V minimum input is recommended for guaranteed operation across temperature.

Can the MPQ2019GN-33-AEC1 be used without connecting the PGDL pin?

Yes. If PG timing delay is not required, the PGDL pin may be left floating. In that case, the Power Good signal asserts immediately upon VOUT reaching 92% of nominal (3.04V), with no intentional delay - matching standard fixed-delay LDO behavior.

Is the exposed thermal pad electrically connected to GND internally?

Yes. Pin 3 (GND) and the exposed pad share the same internal ground node. The pad must be soldered to a PCB copper pour tied to the system ground plane to achieve specified θJA (50°C/W) and prevent thermal shutdown during sustained 300mA operation.

Does the FB pin require termination in the MPQ2019GN-33-AEC1 variant?

No. The FB pin is internally connected to the fixed 3.3V feedback divider and is not accessible externally. It must be left floating - no external resistors or capacitors should be attached, as doing so may disrupt regulation accuracy or stability.

How does the EN pin behave during cold-crank conditions?

During cold-crank, VIN may dip below 3V. As long as EN remains ≥1.8V (e.g., pulled up to a separate stabilized rail or biased via resistor divider), the device stays enabled. If EN falls below 0.3V, the IC shuts down and re-enables only after VIN and EN both recover above their respective thresholds.

What is the maximum allowable PG pull-up voltage?

The PG pin is rated for up to +15V on its drain. When used with a 3.3V output, a 100kΩ pull-up to VOUT is standard. If pulled up to a higher rail (e.g., 5V or 12V), ensure the external resistor limits current to <1mA under fault conditions - e.g., 12V pull-up requires ≥12kΩ.

Is reverse-voltage protection included internally?

No. The internal PMOS pass transistor has a body diode conducting from OUT to IN. If VOUT exceeds VIN (e.g., backup battery scenario), uncontrolled reverse current flows. An external Schottky diode in series with IN is mandatory to prevent damage in such configurations.