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

Overview

MPQ2019GN-33-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified 300mA low-quiescent-current linear regulator with fixed 3.3V output, 3V–40V input range, 12µA typical quiescent current at light load, and integrated power-good monitoring with programmable delay. It delivers stable voltage to automotive microcontrollers and sensor modules under wide battery voltage transients.

For engineers reviewing the MPQ2019GN-33-AEC1-Z datasheet, MPQ2019GN-33-AEC1-Z pinout, MPQ2019GN-33-AEC1-Z application, or MPQ2019GN-33-AEC1-Z equivalent, key selection criteria include its ±2% output accuracy over –40°C to +125°C ambient, 480mV max dropout at 300mA/3.3V, thermal shutdown at 165°C, and SOIC-8 EP package with exposed pad for enhanced thermal performance.

Technical Context

The MPQ2019GN-33-AEC1-Z implements a PMOS pass transistor architecture enabling ultra-low quiescent current (12µA typ. at I_LOAD < 1mA) and high input voltage tolerance up to 40V. Its internal feedback network fixes V_OUT at 3.3V with 1.25V reference, eliminating external resistors while maintaining ±2% regulation across temperature and line/load conditions.

Power-good functionality is implemented via an open-drain PG pin with 92% rising threshold (relative to V_FB) and 5% hysteresis, coupled with a dedicated PGDL pin that accepts a capacitor (e.g., 47nF) to program delay time from 5ms to 15ms. Thermal protection uses a 165°C shutdown threshold with 30°C hysteresis for reliable fault recovery.

Key Specifications

Pinout & Package

MPQ2019GN-33-AEC1-Z is housed in a SOIC-8 EP (exposed pad) package measuring 4.9mm × 3.9mm × 1.75mm, with the exposed thermal pad electrically connected to GND and requiring solder connection to a PCB ground plane for optimal thermal dissipation (θ_JA = 50°C/W).

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-Z uniquely combines programmable PG delay, ultra-low 12µA quiescent current, and SOIC-8 EP thermal performance - making it optimal for ADAS and BCM designs requiring precise power sequencing and long-term reliability.

Availability

MPQ2019GN-33-AEC1-Z is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN nodes, portable medical diagnostics, and ADAS camera modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MPQ2019GN-33-AEC1-Z 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 high-voltage tolerance, ultra-low quiescent current, and AEC-Q100 compliance - specifically engineered for battery-powered and start-stop vehicle systems.

FAQ

What is the maximum allowable input voltage for MPQ2019GN-33-AEC1-Z?

The absolute maximum input voltage is +42V, but the recommended operating range is 3V to 40V. Operation above 40V risks exceeding safe power dissipation limits even at light loads, especially at elevated ambient temperatures. The device includes internal overvoltage clamp protection, but sustained operation beyond 40V is not characterized or guaranteed per AEC-Q100 test conditions.

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

Yes - PGDL is optional. If left unconnected, the power-good signal asserts immediately upon V_OUT reaching 92% of nominal (no intentional delay). For applications requiring delayed PG assertion (e.g., to allow downstream capacitors to charge), a capacitor (e.g., 47nF) must be connected between PGDL and GND. No pull-up or pull-down is required on PGDL.

Does the MPQ2019GN-33-AEC1-Z require an external feedback resistor network?

No. Unlike the adjustable MPQ2019GN variant, the -33 suffix denotes a factory-trimmed fixed 3.3V output version. The internal feedback divider (1.64MΩ/1MΩ) is laser-trimmed for ±2% accuracy, so FB is internally connected and requires no external components. Leaving FB unconnected has no effect on regulation.

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

The exposed pad (EP) in SOIC-8 EP reduces θ_JA from ~85°C/W (standard SOIC-8) to 50°C/W when properly soldered to a 2-in² copper pour. This enables 300mA continuous output at +85°C ambient versus derating to ~180mA in standard SOIC-8. The EP also lowers θ_JC to 10°C/W, allowing direct thermal coupling to heatsinks or metal chassis in automotive enclosures.

Is reverse voltage protection built-in, or must it be added externally?

Reverse voltage protection is not built-in. Due to the PMOS pass transistor's intrinsic body diode, current can flow from OUT to IN if V_OUT > V_IN (e.g., during battery backup scenarios). To prevent destructive reverse current, an external Schottky diode (cathode to IN, anode to GND) or ideal diode controller must be added at the input. MPS recommends this in Section 13 of the datasheet.

What is the minimum output capacitor value required for stability?

The minimum stable output capacitance is 0.47μF ceramic (X5R or X7R dielectric). Values below this risk oscillation under load transients. Larger values (e.g., 10μF–22μF) improve load transient response and reduce output ripple but do not affect basic stability. Tantalum or aluminum electrolytics are not recommended due to ESR drift and aging effects.

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

EN has TTL-compatible thresholds: logic high (>1.8V) enables regulation with ~1ms startup time; logic low (<0.3V) disables the pass transistor and reduces supply current to <1µA. During shutdown, OUT discharges through the load and internal leakage; no active discharge circuit is present. For controlled discharge, an external bleed resistor may be added across OUT–GND.