Monolithic Power Systems Inc. MPQ5074GQBE-AEC1-P

Overview

MPQ5074GQBE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified automotive load switch IC with integrated 10mΩ DMOS FET, configurable 1.36–3A current limit via external resistor, soft-start control, output discharge, and push-pull power-good indication. It operates across 1.2V–5.5V input, delivers up to 3A load current, and targets power rail sequencing in ADAS camera modules, infotainment head units, digital instrument clusters, and body control modules.

For engineers reviewing the MPQ5074GQBE-AEC1-P datasheet, MPQ5074GQBE-AEC1-P pinout, MPQ5074GQBE-AEC1-P application, or MPQ5074GQBE-AEC1-P equivalent, key selection criteria include its 200ns short-circuit response, thermal shutdown with 30°C hysteresis, <1µA shutdown current, adjustable soft-start slew rate, and PG fault signaling for VIN–VOUT voltage gap monitoring.

Technical Context

The MPQ5074GQBE-AEC1-P integrates a charge-pump–driven low-R_DS(ON) power MOSFET and implements dual-stage over-current protection: primary regulation at user-configured ILIMIT (via ILIM pin resistor) and fast-turn-off SCP at ~3A with ≤200ns response. Its functional block includes independent UVLO on VCC, EN-controlled logic, current-sense amplifier with 87,000:1 sense ratio, and thermal sensing with 155°C shutdown threshold.

Power Good (PG) operates as a push-pull output with 70μs delay on high-to-low transition when VIN–VOUT exceeds 200mV, and immediate low assertion on OCP warning or SCP event. Soft-start uses internal 9µA constant-current source charging external capacitor at SS pin, with VOUT ramping at 3× the VSS slew rate.

Key Specifications

Pinout & Package

MPQ5074GQBE-AEC1-P is housed in a thermally enhanced QFN-13 package (2.5mm × 3mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by dot; top-side marking reads "BTE" followed by date/lot code.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22975PWPR and NIS5020MN3TXG, MPQ5074GQBE-AEC1-P uniquely combines AEC-Q100 Grade 1 qualification, user-configurable current limiting, integrated output discharge, and push-pull PG with sub-200ns SCP - making it the only option qualified for safety-critical ADAS power rail management.

Availability

MPQ5074GQBE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, ADAS camera modules, and body control units requiring stable component supply across extended product lifecycles.

Supply support for MPQ5074GQBE-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 consumer applications, with design centers in the US, China, and Taiwan.

The MPQ5074 belongs to MPS's automotive-grade load switch product line, engineered specifically for fault-resilient power distribution in AEC-Q100–compliant electronic control units where reliability, thermal robustness, and diagnostic capability are mandatory.

FAQ

What is the minimum recommended soft-start capacitor value for MPQ5074GQBE-AEC1-P?

The datasheet specifies CSS > 4.7nF to ensure controlled VOUT ramping. With lower values, VOUT rise time defaults to MOSFET gate charge time, risking inrush overshoot. For 3A loads with ≥100µF output capacitance, 22nF is recommended to achieve ~4ms tSS and stay within ILIMIT during startup.

How does the MPQ5074GQBE-AEC1-P respond to a sustained short circuit?

Upon detecting current exceeding the secondary SCP threshold (~3A), it disables the FET within 200ns. After 80µs off-time, it re-enables at 2/3 of the original ILIMIT. If the short persists, repeated cycles occur until thermal shutdown at 155°C activates, holding output disabled until junction cools by 30°C.

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

No. PG is a push-pull output rated for ≤10mA sink/source, but its VOL is 0.2V at 1mA and VOH is 3.2V at VCC = 3.3V. Driving an LED requires a series resistor (e.g., 1kΩ for ~3mA) and assumes the LED anode connects to VCC - direct connection risks excessive current if PG goes low.

Is the ILIM resistor value affected by temperature drift?

Yes. The current-sense ratio varies slightly with VIN and VCC (±5% over −40°C to +125°C), and RILIM tolerance contributes to ILIMIT error. Using a 1% metal-film resistor and referencing the "Sense Current Ratio vs. Temperature" curves on page 7 minimizes total error to ±10% across automotive temperature range.

Does MPQ5074GQBE-AEC1-P support reverse current blocking?

No. The integrated DMOS FET is unidirectional and lacks body-diode reverse-blocking capability. If reverse current flow from VOUT to VIN is possible (e.g., during hot-swap with charged output caps), an external Schottky diode in series with VIN is required to prevent backfeeding.

What is the maximum allowable power dissipation at 85°C ambient in the QFN-13 package?

Using θJA = 49°C/W from the datasheet: PD(MAX) = (150°C − 85°C) / 49°C/W ≈ 1.33W. At 3A and 10mΩ RDS(ON), conduction loss is 90mW - well within limit. However, PCB copper area and thermal vias must be optimized per Figure 4 to maintain θJA ≤ 49°C/W.

How does the MPQ5074GQBE-AEC1-P behave when VCC drops below UVLO threshold?

When VCC falls below 2.5V (rising) or 2.3V (falling), the internal UVLO circuit disables all functions: EN is ignored, PG goes high-impedance, and the power FET turns off. VCC must rise above 2.8V to re-enable operation - preventing erratic behavior during brownout conditions.