Monolithic Power Systems Inc. MPQ5077AGQBE-AEC1-Z

Overview

MPQ5077AGQBE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified configurable load switch IC for automotive power distribution. It delivers up to 7A output current with 10mΩ R_DS(ON), operates across 1.2V–5.5V input, features adjustable current limiting via external ILIM resistor, and integrates soft-start, output discharge, thermal shutdown, and push-pull PG indicator. Used in infotainment head units to manage high-current display backlight or USB-C PD rail sequencing.

For engineers reviewing the MPQ5077AGQBE-AEC1-Z datasheet, MPQ5077AGQBE-AEC1-Z pinout, MPQ5077AGQBE-AEC1-Z application, or MPQ5077AGQBE-AEC1-Z equivalent, key selection criteria include its 7A configurable current limit, <200ns short-circuit response, QFN-13 (2.5mm×3mm) AEC-Q100 package, 1.2V–5.5V VIN range, and integrated PG signaling for system-level fault reporting.

Technical Context

The MPQ5077AGQBE-AEC1-Z implements a sense-FET-based current-limit architecture where ILIM sets threshold via external resistor (e.g., 10.7kΩ yields ~7A), and internal charge pump drives a low-R_DS(ON) DMOS switch. Its control loop responds in ~20µs to overcurrent events, while a secondary fast-turn-off circuit triggers within 200ns for hard short-circuits.

It embeds dual protection layers: primary current regulation with programmable limit and secondary SCP with 80µs auto-retry, plus thermal shutdown at 155°C (30°C hysteresis). The PG pin asserts high after 70µs when V_IN–V_OUT < 150mV, and pulls low instantly on OC warning or >200mV dropout-enabling real-time rail health monitoring in ADAS domain controllers.

Key Specifications

Pinout & Package

MPQ5077AGQBE-AEC1-Z uses a thermally enhanced QFN-13 (2.5mm × 3mm, 0.5mm pitch) package with exposed thermal pad. Pin 1 marked by dot; pins 6/11/13 are VIN inputs (parallel-connected), pins 7/8/9/10 are VOUT outputs (parallel-connected), and GND (pin 2) connects directly to thermal pad for optimal heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22992DMLR and RTQ2134BGQW, MPQ5077AGQBE-AEC1-Z uniquely combines AEC-Q100 Grade 1 qualification, fully integrated PG and discharge, sub-200ns SCP, and resistor-programmable 7A current limit in a 2.5mm×3mm footprint-making it the only solution that satisfies ASIL-B–aligned power sequencing requirements without supplemental components.

Availability

MPQ5077AGQBE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, digital instrument clusters, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPQ5077AGQBE-AEC1-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 power management ICs, with core expertise in DC-DC converters, load switches, and motor drivers for automotive, industrial, and computing markets.

The MPQ5077A product line targets AEC-Q100-compliant automotive power distribution, emphasizing low R_DS(ON), fast fault response, and integrated diagnostics to simplify functional safety–compliant system design.

FAQ

What is the minimum input voltage required for MPQ5077AGQBE-AEC1-Z to operate?

The MPQ5077AGQBE-AEC1-Z operates down to 1.2V input voltage, enabling reliable startup during automotive cold-crank conditions where battery voltage may dip to 1.2V–1.8V. This is verified across the full -40°C to +125°C junction temperature range per AEC-Q100 Grade 1 testing.

How is the 7A current limit configured, and what resistor value achieves it?

The 7A current limit is set using a 10.7kΩ resistor from ILIM pin to ground, as confirmed in the datasheet's Design Example Table 1 and Typical Characteristics curves. This value yields nominal 7A limit at 3.6V input and accounts for sense-ratio variation across temperature and supply conditions.

Does MPQ5077AGQBE-AEC1-Z provide reverse current blocking?

No, MPQ5077AGQBE-AEC1-Z does not include reverse current blocking. It is a unidirectional high-side load switch optimized for forward conduction only. Reverse current protection must be implemented externally using a Schottky diode or dedicated reverse-blocking IC if required by the application.

What is the thermal performance of the QFN-13 package under 7A continuous load?

With proper PCB layout (≥6 thermal vias to inner ground plane), the QFN-13 package achieves θ_JA = 49°C/W. At 7A and 10mΩ R_DS(ON), power dissipation is 490mW, resulting in ~24°C rise above ambient-well within the 125°C max operating junction temperature at 85°C ambient.

Can the soft-start time be disabled or bypassed?

Soft-start cannot be fully disabled, but its effect is minimized by leaving SS pin floating or using ≤1nF capacitor-reducing t_SS to MOSFET gate-charge-limited rise time (~10–50µs). However, this forfeits inrush control and is not recommended for loads >100µF or >3A peak.

Is the PG output compatible with 1.8V logic systems?

No, PG is a push-pull output referenced to VCC (3V–5.5V), so its high-state voltage equals VCC and low-state is <0.2V at 1mA sink. Direct interfacing with 1.8V logic requires a level-shifter; alternatively, use the PG signal to drive a 1.8V-tolerant GPIO with appropriate voltage divider or buffer.

What failure modes trigger immediate PG deassertion?

PG pulls low immediately-without delay-upon detection of either output overcurrent (OC warning threshold exceeded) or V_IN–V_OUT > 200mV (indicating open-load, severe voltage drop, or switch failure). This enables real-time fault capture for diagnostic logging in AUTOSAR-compliant ECUs.