Monolithic Power Systems Inc. MPQ2019GN-Z

Overview

MPQ2019GN-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified adjustable-output linear regulator delivering up to 300mA with 10µA quiescent current, 3V–40V input range, and 1.25V–15V output adjustability. It integrates power-good monitoring with programmable delay, thermal shutdown, and current limiting-designed for automotive body electronics and industrial control modules requiring stable low-power bias under wide-input-voltage transients.

For engineers reviewing the MPQ2019GN-Z datasheet, MPQ2019GN-Z pinout, MPQ2019GN-Z application, or MPQ2019GN-Z equivalent, key selection criteria include its ±2% output accuracy over temperature, SOIC-8 EP thermal performance (θJA = 50°C/W), PGDL capacitor-programmable delay (5–15ms), and compatibility with ≥0.47µF ceramic output capacitors without external compensation.

Technical Context

The MPQ2019GN-Z implements a PMOS pass transistor architecture enabling ultra-low dropout (420mV @ 300mA, VOUT=5V) and reverse-voltage protection awareness via external diode recommendation. Its feedback loop regulates FB to 1.25V with 50nA input bias, supporting resistor-divider-based output programming while maintaining stability with minimal 0.47µF X5R/X7R ceramic output capacitance.

Power-good functionality uses an open-drain PG pin with 5% hysteresis (88–93% of VFB) and a dedicated PGDL pin whose charging current (3–9µA) sets delay time via external capacitor-enabling precise power sequencing in multi-rail systems. Thermal shutdown activates at 165°C with 30°C hysteresis, and internal current limiting caps peak output at 1000mA.

Key Specifications

Pinout & Package

MPQ2019GN-Z is housed in a thermally enhanced SOIC-8 EP package with exposed pad soldered to PCB ground plane for optimal thermal dissipation (θJC = 10°C/W). The exposed pad must be connected to GND for safe operation at full load.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7B8133QDDARQ1 and NCV8664ST33T3G, MPQ2019GN-Z uniquely combines adjustable output, programmable PG delay, and 10µA IQ in a single AEC-Q100 Grade 1 device-enabling fewer components, tighter power sequencing, and longer battery life in multi-voltage automotive and industrial systems.

Availability

MPQ2019GN-Z is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, portable medical diagnostics, and telematics control units requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.

Supply support for MPQ2019GN-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 ultra-low IQ, wide-input-voltage tolerance, and integrated power sequencing-specifically engineered for body electronics, ADAS subsystems, and harsh-environment sensor interfaces.

FAQ

What is the minimum output capacitor required for stability with MPQ2019GN-Z?

The MPQ2019GN-Z is stable with a minimum 0.47µF X5R or X7R ceramic output capacitor. Larger values (up to 22µF) improve load transient response and reduce noise, but are not required for basic stability. Avoid Y5V dielectrics due to large capacitance drift over temperature.

Can MPQ2019GN-Z be used with a 5V fixed output instead of adjustable configuration?

Yes-MPQ2019GN-Z is the adjustable version, but Monolithic Power offers pin-compatible fixed-output variants (e.g., MPQ2019GN-33, MPQ2019GN-5). The GN-Z suffix denotes tape-and-reel packaging; the base part number determines functionality. For 5V fixed output, use MPQ2019GN-5-Z.

How is the power-good delay time calculated for MPQ2019GN-Z?

Delay time t_PGDL (ms) = C_PGDL (nF) × V_{th_PGDL} (1.7V) ÷ I_PGDL (µA). With typical I_PGDL = 5.5µA, a 47nF capacitor yields ~10ms delay. The PGDL pin charges linearly until reaching 1.7V, at which point PG asserts high-enabling precise sequencing without external timers.

Does MPQ2019GN-Z require an external diode for reverse-voltage protection?

Yes-when the output voltage exceeds the input (e.g., backup battery scenario), the internal PMOS body diode conducts uncontrolled reverse current. An external Schottky diode (anode to IN, cathode to VIN supply) is recommended to block this path and prevent IC damage during reverse-bias conditions.

What is the maximum junction temperature and thermal shutdown behavior?

The MPQ2019GN-Z shuts down at 165°C junction temperature with 30°C hysteresis, re-enabling regulation once die temperature falls below 135°C. Continuous operation above 125°C ambient requires adequate PCB copper area under the exposed pad; θJA = 50°C/W on a 4-layer board per JEDEC JESD51-7.

Is MPQ2019GN-Z compatible with ceramic capacitors having low ESR?

Yes-unlike many older LDOs, MPQ2019GN-Z is explicitly designed for low-ESR ceramic capacitors (≥0.47µF, X5R/X7R). Its internal compensation eliminates need for high-ESR tantalum or aluminum electrolytics, reducing size, cost, and failure risk in automotive and industrial deployments.