Monolithic Power Systems Inc. MPQ2019GN-33

Overview

MPQ2019GN-33 from Monolithic Power Systems is a 40V-input, 300mA AEC-Q100 Grade 1 linear regulator with fixed 3.3V output, 12–16µA quiescent current (0–1mA load), 3.2–3.4V output accuracy over temperature, and integrated power-good monitoring with programmable delay. It operates in automotive and industrial systems powered by high-voltage batteries (e.g., 12V/24V rails) where ultra-low standby power and thermal robustness are critical.

For engineers reviewing the MPQ2019GN-33 datasheet, MPQ2019GN-33 pinout, MPQ2019GN-33 application, or MPQ2019GN-33 equivalent, this device supports low-power microcontroller supply, battery-powered instrumentation, and AEC-Q100-compliant subsystems requiring stable 3.3V regulation across –40°C to +125°C ambient with <1µA shutdown current and SOIC-8 EP thermal performance.

Technical Context

The MPQ2019GN-33 uses a PMOS pass transistor architecture enabling low dropout (230–640mV at 300mA) and reverse-voltage protection awareness via external diode recommendation. Its internal 1.64MΩ/1MΩ FB divider sets nominal 3.3V output, regulated to ±2% over temperature and line/load conditions.

Power-good functionality is implemented as an open-drain PG pin with 88–96% VFB threshold hysteresis and user-programmable assertion delay (5–15ms) via external capacitor on PGDL pin, charged at 3–9µA. Thermal shutdown activates at 165°C with 30°C hysteresis, and current limiting trips at 600–1350mA peak.

Key Specifications

Pinout & Package

MPQ2019GN-33 is housed in a thermally enhanced SOIC-8 EP (exposed pad) package, optimized for PCB heat dissipation with θJA = 50°C/W on 4-layer board. The exposed pad must be soldered to a solid ground plane for safe operation at full 300mA continuous load.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3.3V automotive LDO applications.

Compared with TPS7B6733QPWPRQ1 and NCV8664ST33T3G, MPQ2019GN-33 uniquely balances ultra-low IQ (12–16µA), AEC-Q100 Grade 1 compliance, programmable PG delay, and SOIC-8 EP thermal performance-making it optimal for battery-constrained automotive and industrial edge devices requiring both precision and fault-aware power sequencing.

Availability

MPQ2019GN-33 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, portable medical monitors, and smart building controllers requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.

Supply support for MPQ2019GN-33 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 manufacturing partners across Asia.

The MPQ2019 product line delivers high-input-voltage linear regulators for automotive and industrial applications where reliability, low IQ, and extended temperature operation are mandatory-designed specifically to replace discrete LDO solutions in safety-critical subsystems.

FAQ

What is the maximum allowable input voltage for MPQ2019GN-33, and what happens beyond that?

The absolute maximum input voltage is +42V. Exceeding this risks permanent damage to the internal PMOS pass transistor and control circuitry. The device is rated for continuous operation up to 40V, and its 40V specification includes margin for transients like ISO 7637-2 pulse 5a (75V/100ms), but external clamping or filtering is recommended for such events.

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

Yes. If programmable power-good delay is not needed, the PGDL pin may be left floating. In that case, the PG signal asserts immediately upon VOUT reaching 92% of 3.3V (≈3.04V), with no intentional delay. No pull-up or pull-down is required.

Is the FB pin functional in the MPQ2019GN-33 fixed-output variant?

No. The FB pin is internally connected to the factory-trimmed 1.64MΩ/1MΩ resistor divider and must remain unconnected in the MPQ2019GN-33. Connecting external components to FB will disrupt regulation and void output accuracy guarantees.

How does thermal performance differ between MPQ2019GN-33 and standard SOIC-8 packages?

The "EP" (exposed pad) in SOIC-8 EP reduces θJA to 50°C/W (vs. ~120°C/W for standard SOIC-8) when the pad is soldered to a 1-in² copper area. This allows 300mA continuous output at +85°C ambient, whereas standard SOIC-8 would thermally shut down well below that load.

Does MPQ2019GN-33 require an input capacitor, and what value is recommended?

Yes. A 1µF to 10µF X5R/X7R ceramic capacitor is required between IN and GND, placed within 5mm of the pins. This stabilizes input impedance, suppresses high-frequency noise, and improves line transient response-especially critical during cold-crank events in automotive applications.

What failure modes does MPQ2019GN-33 protect against, and how are they implemented?

It provides short-circuit protection (current limit trips at 600–1350mA), over-temperature shutdown (165°C with 30°C hysteresis), and undervoltage lockout on EN. All protections are fully integrated-no external components needed-and automatically recover once fault conditions clear.

Is MPQ2019GN-33 compatible with lead-free reflow profiles?

Yes. It is qualified for standard JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260°C. The SOIC-8 EP package is RoHS-compliant, halogen-free, and rated for moisture sensitivity level MSL-3, requiring bake-out only if exposed to ambient >30°C/60% RH for >168 hours.