Monolithic Power Systems Inc. MPQ5077AGQBE-AEC1-P

Overview

MPQ5077AGQBE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified configurable load switch with integrated 10 mΩ DMOS power MOSFET, 7 A current limit (set via external ILIM resistor), soft-start control (via SS pin capacitor), and push-pull power-good (PG) indicator. It operates across 1.2 V to 5.5 V input voltage and supports automotive infotainment, instrument clusters, and ADAS domain controllers requiring robust inrush current management and fault signaling.

For engineers reviewing the MPQ5077AGQBE-AEC1-P datasheet, MPQ5077AGQBE-AEC1-P pinout, MPQ5077AGQBE-AEC1-P application, or MPQ5077AGQBE-AEC1-P equivalent, key selection criteria include its adjustable 7 A current limit, <200 ns short-circuit response, thermal shutdown at 155 °C, and QFN-13 (2.5 mm × 3 mm) package with exposed thermal pad for automotive-grade thermal reliability.

Technical Context

The MPQ5077AGQBE-AEC1-P implements a sense-MOSFET-based current-limit architecture with programmable threshold via ILIM-to-ground resistor, enabling precise overload protection without external sensing components. Its internal charge pump drives the gate of a low-R_DS(ON) DMOS switch, achieving 6.5–13 mΩ on-resistance depending on V_CC.

It integrates dual-stage protection: fast-acting short-circuit detection (<200 ns response) that forces immediate MOSFET shutdown, and slower thermal shutdown (155 °C trigger, 30 °C hysteresis). The PG pin provides real-time status via push-pull output tied to VIN–VOUT voltage gap (>150 mV) or over-current warning, with 70 µs delay on power-up assertion.

Key Specifications

Pinout & Package

The MPQ5077AGQBE-AEC1-P is housed in a thermally enhanced QFN-13 (2.5 mm × 3 mm) package with exposed thermal pad, optimized for automotive under-hood thermal environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22975DQAR and NIS5020MN, the MPQ5077AGQBE-AEC1-P uniquely delivers programmable 7 A current limiting, automotive-grade thermal resilience (−40 °C to +125 °C), and integrated PG signaling-enabling single-chip compliance with ASIL-B power management requirements in ADAS ECUs.

Availability

MPQ5077AGQBE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment head units, digital instrument clusters, and ADAS camera modules requiring stable component supply with AEC-Q100 Grade 1 assurance and full production traceability.

Supply support for MPQ5077AGQBE-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-efficiency power management ICs for automotive, industrial, and computing markets, with design centers in the US, China, and Taiwan.

The MPQ5077A product line targets automotive power distribution with AEC-Q100 qualification, emphasizing low R_DS(ON), fast fault response, and integrated diagnostics for next-generation E/E architectures.

FAQ

What is the minimum recommended soft-start capacitor value for MPQ5077AGQBE-AEC1-P?

The datasheet specifies a minimum CSS of 4.7 nF. Using a smaller capacitor results in uncontrolled V_OUT rise time limited only by MOSFET gate charge, risking inrush currents exceeding the configured ILIMIT. For 7 A loads with ≥1000 µF output capacitance, 100 nF is recommended to achieve ~20 ms t_SS and limit peak I_IN to ≤1.2 × ILIMIT.

How does the MPQ5077AGQBE-AEC1-P respond to a sustained short circuit?

Upon detecting a short circuit, the device triggers its <200 ns fast-turn-off circuit, disabling the MOSFET for 80 µs. If the fault persists after recovery, ILIMIT is reduced to 2/3 of its preset value (e.g., 4.7 A from 7 A) until thermal shutdown occurs at 155 °C. This staged response prevents immediate latch-up while limiting energy dissipation.

Can the PG pin drive an LED directly without external components?

No. The PG pin has a 250 kΩ internal pull-up and 200 Ω pull-down, delivering only ~13 µA in high state (V_CC = 3.3 V) - insufficient for LED biasing. An external NPN transistor or logic buffer is required to interface with indicator LEDs or MCU GPIOs needing >1 mA sink/source capability.

Is the ILIM resistor tolerance critical for current-limit accuracy?

Yes. With a typical current-sense ratio of 87,000 and 0.974 V reference, a 1 % resistor tolerance contributes ~1.1 % error to ILIMIT. For safety-critical 7 A applications, 0.5 % metal-film resistors are recommended; the datasheet confirms ±10 % total ILIMIT variation across temperature and process corners when using 1 % RLIM.

Does the MPQ5077AGQBE-AEC1-P support reverse current blocking?

No. The device contains a single N-channel MOSFET with body diode oriented for forward conduction only. Reverse current flow from VOUT to VIN is permitted through the intrinsic diode and is not blocked. External reverse-polarity protection (e.g., ideal diode controller or Schottky) must be added if bidirectional isolation is required.

What is the maximum allowable power dissipation at 85 °C ambient temperature?

Using θ_JA = 49 °C/W and T_J(MAX) = 150 °C, PD_MAX = (150 − 85) / 49 ≈ 1.33 W. At 7 A and R_DS(ON) = 13 mΩ, conduction loss is 0.64 W, leaving ~0.69 W margin for switching and fault losses - sufficient for continuous operation with proper PCB copper area and thermal vias.

How does the current-sense ratio vary with input voltage and temperature?

The current-sense ratio shifts incrementally: it decreases by ~0.5 % per 1 V increase in VIN (from 1.2 V to 5.5 V) and increases by ~0.02 %/°C from −40 °C to +125 °C. These variations are characterized and included in the ±10 % total ILIMIT error budget; no calibration is required for automotive applications.