Monolithic Power Systems Inc. MPQ2019GN-5-Z

Overview

MPQ2019GN-5-Z from Monolithic Power Systems is a 40V-input, 300mA AEC-Q100 Grade 1 adjustable/fixed-output linear regulator in SOIC-8 EP package, delivering 5.0V ±2% output with 230–640mV dropout at 300mA, 10µA quiescent current, and integrated power-good signaling with programmable delay. It powers ultra-low-power microcontrollers in automotive body electronics requiring stable 5V rail under wide input transients.

For engineers reviewing the MPQ2019GN-5-Z datasheet, MPQ2019GN-5-Z pinout, MPQ2019GN-5-Z application, or MPQ2019GN-5-Z equivalent, key selection factors include its 3V–40V input range, thermal shutdown at 165°C, ±2% output accuracy over –40°C to +125°C ambient, PG delay programmability via external capacitor, and SOIC-8 EP thermal performance (θJA = 50°C/W).

Technical Context

The MPQ2019GN-5-Z uses a PMOS pass transistor architecture enabling low dropout and reverse-voltage protection awareness. Its internal 1.25V reference feeds a precision error amplifier that regulates output by controlling the pass device's gate voltage, with feedback taken directly from the FB pin for fixed versions or via external resistor divider for adjustable configurations.

Power-good functionality is implemented via an open-drain MOSFET whose activation threshold is set at 88–96% of nominal VFB (4.85–5.15V), with hysteresis and delay timing controlled by external capacitor on PGDL pin (5–15ms delay with 47nF). Thermal shutdown engages at 165°C with 30°C hysteresis, ensuring safe recovery after overload or ambient rise.

Key Specifications

Pinout & Package

MPQ2019GN-5-Z is housed in a thermally enhanced SOIC-8 EP (exposed pad) package measuring 4.9mm × 3.9mm × 1.5mm, with θJA = 50°C/W on 4-layer PCB. The exposed pad must be soldered to a dedicated ground plane for optimal thermal dissipation and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5V linear regulator applications.

Compared with TPS7B6750QPWPRQ1 and NCP160AMX500AATBG, MPQ2019GN-5-Z uniquely combines AEC-Q100 Grade 1 qualification, programmable PG delay, 10µA IQ, and 40V input in SOIC-8 EP - making it the sole option meeting full automotive body electronics requirements without design compromises.

Availability

MPQ2019GN-5-Z is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, medical portable monitors, and telematics control units requiring stable component supply across extended temperature and long product lifecycles.

Supply support for MPQ2019GN-5-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 delivers high-voltage, low-quiescent-current linear regulators engineered for automotive and industrial systems where input voltage extremes, thermal constraints, and functional safety compliance are critical.

FAQ

What is the minimum input voltage required for MPQ2019GN-5-Z to regulate 5V output?

The MPQ2019GN-5-Z requires a minimum input voltage of 5.48V to maintain regulation at 300mA load, based on its maximum dropout voltage of 640mV. At lighter loads (e.g., 150mA), dropout drops to 480mV, lowering the minimum VIN to 5.48V. Below 3V input, the internal UVLO disables operation entirely.

Can the MPQ2019GN-5-Z be used without connecting the PGDL pin?

Yes - the PGDL pin is optional. If left unconnected, the power-good signal asserts immediately upon output reaching regulation (no intentional delay). For applications requiring timed sequencing, a capacitor (e.g., 47nF) must be connected between PGDL and GND to achieve 5–15ms programmable delay per datasheet Equation 1.

Is the exposed pad on the SOIC-8 EP package electrically connected?

Yes - the exposed pad is internally connected to GND and must be soldered to a PCB ground plane. This connection provides the primary thermal conduction path and reduces θJA from ~80°C/W (unconnected) to 50°C/W (properly connected), enabling 2.5W continuous power dissipation at +25°C ambient.

Does MPQ2019GN-5-Z support reverse-voltage protection?

No - the internal PMOS pass transistor includes a body diode that conducts from OUT to IN if VOUT > VIN. In backup-battery or dual-supply scenarios, this can cause destructive reverse current. An external Schottky diode (anode to IN, cathode to VIN) is required to block reverse conduction and protect the IC.

How does the EN pin behave during power-up?

The EN pin has a 0.3V low-threshold and 1.8V high-threshold with hysteresis. When VIN rises, EN must exceed 1.8V to enable regulation. If EN is tied directly to VIN, startup occurs automatically once VIN crosses 1.8V - but this risks premature enablement during slow-rising or noisy supplies. A dedicated enable circuit is recommended for robust sequencing.

What is the maximum allowable output capacitor value?

No upper limit is specified - the MPQ2019GN-5-Z remains stable with ceramic output capacitors up to 22µF (X5R/X7R dielectric). Larger values improve load transient response and reduce output ripple, but do not affect stability. Avoid high-ESR capacitors (e.g., standard aluminum electrolytics) which may induce oscillation.

Is the 5V output trimmed at final test?

Yes - the MPQ2019GN-5-Z undergoes post-package trim to achieve ±2% output accuracy across –40°C to +125°C ambient temperature. This specification includes initial tolerance, line regulation (±10mV), and load regulation (±15mV), verified per AEC-Q100 stress testing protocols.