Monolithic Power Systems Inc. MPQ20056GG-18-AEC1-P

Overview

MPQ20056GG-18-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified low-noise, high-PSRR linear regulator delivering up to 250mA output current with 100mV dropout at full load, 150μA ground current, and fixed 1.8V output. It operates from 2.5V–5.5V input and targets power-sensitive automotive infotainment and ADAS domain controllers requiring stable low-voltage bias rails.

For engineers reviewing the MPQ20056GG-18-AEC1-P datasheet, MPQ20056GG-18-AEC1-P pinout, MPQ20056GG-18-AEC1-P application, or MPQ20056GG-18-AEC1-P equivalent, this device supports automotive-grade thermal shutdown (150°C), UVLO (2.3V rising threshold), and 63dB PSRR at 1kHz-key selection criteria for noise-critical sensor and RF subsystems.

Technical Context

The MPQ20056GG-18-AEC1-P uses an internal PMOS pass transistor enabling ultra-low dropout (100mV @ 250mA) and minimal ground current (150μA @ light load). Its feedback architecture centers on a 0.8V reference voltage with ±2% output accuracy over -40°C to +125°C junction temperature.

It integrates enable-controlled shutdown (EN logic high ≥1.5V), short-circuit protection (350–850mA limit), and thermal foldback triggered at 150°C with 20°C hysteresis. The regulator is stable with 4.7μF ceramic output capacitance and achieves 13μV_RMS integrated noise (10Hz–100kHz) at 1.8V output.

Key Specifications

Pinout & Package

MPQ20056GG-18-AEC1-P is housed in a thermally enhanced 2mm × 2mm QFN-8 package with exposed thermal pad. Pin assignments are validated per MPS Rev. 1.3 datasheet and optimized for PCB heat dissipation via direct GND plane connection to the exposed pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, AEC-Q100 linear regulator applications.

Compared with TPS7B8133QDGNRQ1 and NCP163AMX180TBG, MPQ20056GG-18-AEC1-P uniquely combines AEC-Q100 Grade 1, 1.8V output, sub-100mV dropout, and 63dB PSRR-making it the only option meeting stringent noise, thermal, and qualification requirements for next-gen automotive domain controllers.

Availability

MPQ20056GG-18-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPQ20056GG-18-AEC1-P 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.

The MPQ20056 product line delivers AEC-Q100-qualified linear regulators optimized for automotive subsystems demanding ultra-low noise, high PSRR, and robust thermal behavior under harsh operating conditions.

FAQ

What is the maximum allowable input voltage for MPQ20056GG-18-AEC1-P?

The absolute maximum input voltage is +6V referenced to GND. However, the recommended operating range is 2.5V to 5.5V. Operation above 5.5V risks permanent damage even for brief transients, and the UVLO circuit does not protect against overvoltage beyond this limit.

Can MPQ20056GG-18-AEC1-P be used with ceramic output capacitors smaller than 4.7μF?

No-MPS specifies 4.7μF minimum ceramic capacitance for stability. Using smaller values (e.g., 2.2μF) causes phase margin degradation and may result in sustained ringing or oscillation under load transients, especially above 100mA step changes.

Is the EN pin internally pulled up or down?

The EN pin has no internal pull-up or pull-down resistor. It must be actively driven: ≥1.5V for ON, ≤0.4V for OFF. Leaving it floating violates the Absolute Maximum Ratings and can cause unpredictable startup behavior or increased ground current due to input leakage.

Does MPQ20056GG-18-AEC1-P support reverse voltage protection?

No-the internal PMOS pass element contains a body diode that conducts from OUT to IN when VOUT > VIN. In backup-battery scenarios, this creates uncontrolled reverse current. An external Schottky diode in series with the IN pin is mandatory to prevent damage.

How does thermal shutdown behave during continuous overload?

When junction temperature reaches 150°C, the regulator disables the PMOS pass element. After cooling by 20°C (to ~130°C), it automatically resumes regulation. This hysteresis prevents rapid cycling but does not guarantee safe operation above 125°C junction-designers must ensure θJA and power dissipation keep TJ ≤ 125°C.

What is the FB pin voltage for the fixed 1.8V version?

The FB pin is internally connected to the output divider and is not accessible in fixed-output variants like MPQ20056GG-18-AEC1-P. Its internal reference remains 0.8V, but the pin is NC (no connection) and must not be externally loaded or routed.

Is the exposed thermal pad electrically isolated?

No-the exposed pad is internally bonded to the GND net and must be soldered directly to the PCB's main ground plane. Failure to connect it results in θJA degrading from 80°C/W to >150°C/W, causing premature thermal shutdown at <150mA load.