Monolithic Power Systems Inc. MPQ5074GQBE-AEC1-Z

Overview

MPQ5074GQBE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified load switch IC with integrated 10mΩ DMOS FET, configurable 1.36–3A current limit via external resistor, soft-start control, and push-pull power-good indication. It operates across 1.2V–5.5V input voltage and supports automotive infotainment power sequencing where inrush current control and fault reporting are critical.

For engineers reviewing the MPQ5074GQBE-AEC1-Z datasheet, MPQ5074GQBE-AEC1-Z pinout, MPQ5074GQBE-AEC1-Z application, or MPQ5074GQBE-AEC1-Z equivalent, key selection criteria include its 200ns short-circuit response, thermal shutdown hysteresis (30°C), <1µA shutdown current, and QFN-13 (2.5mm×3mm) package suitability for space-constrained ADAS modules.

Technical Context

The MPQ5074GQBE-AEC1-Z integrates a charge-pump–driven low-R_DS(ON) MOSFET and uses a precision current-sense ratio (87,000 typ. at V_IN = 3.6V) to enable accurate ILIMIT configuration via R_ILIM. Its fast-off comparator triggers within 200ns during short-circuit events, while the soft-start circuit employs a 9µA constant-current source charging an external capacitor to control V_OUT slew rate.

Power Good (PG) logic monitors the VIN–VOUT voltage gap (150mV threshold, 70µs delay) and over-current warnings independently, driving a push-pull output capable of sinking ≥10mA. Thermal protection activates at 155°C with 30°C hysteresis, and UVLO on VCC (2.5–2.8V rising threshold) ensures reliable startup under brownout conditions.

Key Specifications

Pinout & Package

MPQ5074GQBE-AEC1-Z is housed in a thermally enhanced QFN-13 package (2.5mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports high-density automotive PCB layouts and requires standard MSL Level 1 handling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22965DRLR and NIS5020MN, MPQ5074GQBE-AEC1-Z uniquely combines AEC-Q100 Grade 1 rating, 3A configurability, soft-start, output discharge, and push-pull PG in a 2.5mm×3mm footprint - making it optimal for next-generation ADAS and infotainment power domains demanding both safety and design flexibility.

Availability

MPQ5074GQBE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, instrument clusters, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPQ5074GQBE-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) designs high-performance power management semiconductors for automotive, industrial, and computing markets, emphasizing integration, efficiency, and reliability.

The MPQ5074 belongs to MPS's AEC-Q100–qualified automotive load switch product line, engineered specifically for robust power sequencing, fault protection, and thermal resilience in harsh-temperature vehicle subsystems.

FAQ

What is the maximum continuous output current supported by MPQ5074GQBE-AEC1-Z?

The device delivers up to 3A continuous output current when configured with R_ILIM = 26.1kΩ and operated within its thermal limits (T_J ≤ 125°C). At higher ambient temperatures or with insufficient PCB copper area, derating applies per θ_JA = 49°C/W. Peak current during short-circuit events is limited to ~3A by the fast-turnoff circuit.

How does the ILIM pin configure current limit, and what resistor values correspond to common thresholds?

The ILIM pin sets ILIMIT using Ohm's law: ILIMIT ≈ 0.974V / R_ILIM × 87,000. For example, 26.1kΩ yields 3A, 49.9kΩ yields ~1.7A, and 15.8kΩ yields ~3.3A. Resistor tolerance directly impacts accuracy; 1% metal-film types are recommended for ±2% ILIMIT control.

Can MPQ5074GQBE-AEC1-Z drive loads requiring faster turn-on than standard soft-start allows?

Yes - bypassing the SS pin (leaving it floating or connecting CSS < 4.7nF) disables controlled ramping, allowing VOUT to rise at the intrinsic MOSFET charge rate (~1–2µs). This mode sacrifices inrush control but enables rapid power assertion for non-capacitive loads like logic supplies.

What failure conditions cause the PG pin to assert low, and how is timing guaranteed?

PG goes low without delay if either the VIN–VOUT voltage gap exceeds 200mV (indicating open-load or severe dropout) or an over-current warning occurs. The 70µs delay applies only to the high-to-low transition when VOUT recovers. PG's push-pull structure ensures fast edge rates and eliminates need for external pull-ups.

Is the thermal pad on the QFN-13 package electrically connected, and how should it be handled in layout?

The exposed thermal pad is internally connected to GND and must be soldered to a dedicated PCB thermal pad with ≥4 thermal vias (0.3mm diameter) to inner ground planes. Failure to do so degrades θ_JA by >15°C/W and risks premature thermal shutdown under 3A load at 85°C ambient.

Does MPQ5074GQBE-AEC1-Z support reverse current blocking?

No - the integrated DMOS FET is unidirectional and lacks body-diode reverse-blocking capability. If reverse current flow (e.g., VOUT > VIN during hot-swap) must be prevented, an external Schottky diode in series with VOUT is required, adding ~0.3V forward drop and thermal overhead.

How does the device behave during VCC undervoltage lockout (UVLO)?

When VCC drops below 2.5V (rising threshold), the IC disables the gate driver and forces PG low. Internal circuitry remains powered down until VCC exceeds 2.8V (with 200mV hysteresis), preventing erratic switching during unstable bias conditions such as battery recovery after cranking.