Monolithic Power Systems Inc. MPQ5073GG-P

Overview

MPQ5073GG-P from Monolithic Power Systems is an AEC-Q100 qualified 5.5V, 2A low-R_DSON load switch with programmable current limit, soft-start control, output discharge, and push-pull power-good indication. It integrates a 50mΩ DMOS FET in a QFN-12 (2mm×2mm) package and operates across 0.5V–5.5V input range. Used for rail sequencing and inrush control in automotive infotainment modules and portable computing power domains.

For engineers reviewing the MPQ5073GG-P datasheet, MPQ5073GG-P pinout, MPQ5073GG-P application, or MPQ5073GG-P equivalent, key selection criteria include its 2A programmable current limit (set via ILIM resistor), <200ns short-circuit response, thermal shutdown at 150°C with 30°C hysteresis, and PG delay of 50µs - all critical for robust hot-swap and fault-tolerant power management.

Technical Context

The MPQ5073GG-P implements a sense-FET-based current-limit architecture with external resistor programming (ILIM-to-GND), enabling precise 1.4A–2.2A overload thresholds. Its internal charge pump drives the gate of a low-R_DSON DMOS FET, achieving 50mΩ typical on-resistance at V_CC = 5V and 25°C.

It features dual-stage protection: fast-off circuitry triggers at ~7A for sub-200ns short-circuit cutoff, while thermal shutdown activates at 150°C with 30°C hysteresis. The PG pin provides push-pull status with 140–450mV voltage-gap detection and 50µs delay, supporting reliable system power sequencing.

Key Specifications

Pinout & Package

MPQ5073GG-P is housed in a thermally enhanced QFN-12 (2mm × 2mm) package with exposed thermal pad. Pin 1 is marked by index area; pins 6, 11, and exposed pad are VIN; pin 9 is VOUT; pins 7, 8, and 10 are NC but recommended to connect to VOUT for improved thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar load switch applications.

Compared with TPS22919DCKR and NIS5020MN, MPQ5073GG-P uniquely combines programmable current limiting, sub-200ns short-circuit response, integrated output discharge, and push-pull PG - making it the only option qualified for AEC-Q100 automotive power-rail sequencing with deterministic fault handling.

Availability

MPQ5073GG-P is available at Aetrix Electronics and suitable for automotive infotainment systems, USB-C power delivery docks, and notebook subsystem power gating requiring stable component supply, AEC-Q100 compliance, and production-ready thermal performance.

Supply support for MPQ5073GG-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 MPQ5073 belongs to MPS's automotive-qualified load switch product line, engineered specifically for fault-resilient power rail control in infotainment, ADAS, and body electronics where AEC-Q100 reliability and fast transient response are mandatory.

FAQ

What is the minimum input voltage required for MPQ5073GG-P to operate?

The MPQ5073GG-P functions down to 0.5V input voltage, enabling use in ultra-low-voltage domains such as advanced SoC I/O rails or battery-powered sensors operating near end-of-life voltage thresholds. This is enabled by its dedicated VCC bias supply (3V–5.5V), which decouples control logic from VIN.

How is the current limit set, and what resistor value yields 2A?

The current limit is set by connecting a resistor (R_ILIM) between ILIM pin and GND. Using the formula I_LIMIT = 33000 / R_ILIM (with R_ILIM in ohms), a 15kΩ resistor yields ~2.2A - recommended to exceed max load by 10–20% to avoid nuisance tripping during transients.

Does MPQ5073GG-P require an external capacitor on the SS pin?

Yes - an external capacitor on SS is mandatory for controlled soft-start. Minimum value is 4.7nF; smaller values cause uncontrolled VOUT rise time limited only by MOSFET gate charge. A 100nF capacitor achieves ~5.4ms soft-start time at 3.6V input, per design example in the datasheet.

What happens during a short-circuit event, and how does recovery work?

Upon short-circuit, the device triggers fast-off within 200ns at ~7A, disabling the FET for 80µs. After this period, it attempts re-enablement; if fault persists, it reduces current limit and eventually enters thermal shutdown at 150°C. Recovery is automatic once fault clears and temperature drops below 120°C.

Is the exposed thermal pad electrically connected, and how should it be handled?

Yes - the exposed pad is internally connected to VIN and must be soldered to a large copper pour tied to VIN. It serves both electrical conduction and thermal dissipation; omitting vias or undersized copper reduces θ_JA performance and risks thermal shutdown under sustained 2A loads.

Can MPQ5073GG-P be used without connecting the VCC pin?

No - VCC (Pin 3) must be supplied with 3V–5.5V independently of VIN. It powers the internal charge pump, logic, and current-sense circuitry. Leaving VCC unconnected disables all functionality, including EN control and PG output, even if VIN is present.

What is the purpose of the NC pins (7, 8, 10), and how should they be treated?

Pins 7, 8, and 10 are no-connect but thermally coupled to the die. MPS recommends connecting them to VOUT to improve heat transfer from the IC to the output copper plane - a layout practice that lowers junction temperature by up to 15°C under full 2A load.