Monolithic Power Systems Inc. MPQ5071GG-AEC1-Z

Overview

MPQ5071GG-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified programmable load switch delivering 0.5A continuous current, 50mΩ R_DS(ON) at 5V V_CC, and adjustable current limiting via external ILIM resistor - deployed in automotive infotainment power rails and ADAS domain controllers to manage inrush and fault isolation.

For engineers reviewing the MPQ5071GG-AEC1-Z datasheet, MPQ5071GG-AEC1-Z pinout, MPQ5071GG-AEC1-Z application, or MPQ5071GG-AEC1-Z equivalent, key selection criteria include its 200ns short-circuit response, integrated output discharge, push/pull PG indicator with 50µs delay, and QFN-12 (2mm×2mm) thermal performance under -40°C to +125°C junction operation.

Technical Context

The MPQ5071GG-AEC1-Z integrates a charge-pump–driven DMOS power MOSFET with sense-FET current monitoring, enabling precise 0.5A current limiting via external resistor on ILIM. Its soft-start slew rate is set by a capacitor on SS, with internal 11µA constant-current source and 5× voltage scaling to V_OUT.

Protection architecture includes three-tiered current handling: primary regulation at user-set limit (e.g., 0.5A), fast-off secondary limit (~7A) with 200ns response, and thermal shutdown at 150°C with 30°C hysteresis. The PG pin asserts high when |V_IN − V_OUT| < 280mV after 50µs delay.

Key Specifications

Pinout & Package

MPQ5071GG-AEC1-Z is housed in a thermally enhanced QFN-12 (2mm × 2mm) package with exposed thermal pad (Pin 6/11/VIN and center pad tied to VIN). The package supports ≤1.6W continuous dissipation (θ_JA = 80°C/W) on standard 4-layer PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22916BYFPR and RT9711CGJ5, MPQ5071GG-AEC1-Z uniquely combines AEC-Q100 Grade 1 operation, programmable current limit, soft-start tuning, and push/pull PG - making it the only option for safety-critical, dynamically loaded automotive subsystems requiring full rail control visibility.

Availability

MPQ5071GG-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics gateway designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPQ5071GG-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-efficiency power management ICs for automotive, industrial, and consumer markets, with global manufacturing and quality certifications including IATF 16949.

The MPQ5071 belongs to MPS's AEC-Q100–qualified automotive load switch product line, engineered specifically for fault-resilient power domain control in ASIL-B–compliant vehicle subsystems.

FAQ

What is the minimum recommended SS capacitor value for stable soft-start operation?

The datasheet specifies a minimum SS capacitor of 4.7nF. Using smaller values risks uncontrolled V_OUT rise time due to MOSFET gate charge dominance, potentially exceeding current limit during startup. A 47nF capacitor yields ~2.4ms soft-start at 3.6V input, balancing inrush suppression and system responsiveness.

How does the ILIM resistor affect current-limit accuracy across temperature?

Current-limit accuracy is ±20% over −40°C to +125°C junction range, dominated by the internal current-sense ratio (S = 33000 typ. at 3.6V VIN) and resistor tolerance. For 0.5A nominal load, a 47kΩ ±1% resistor sets ~0.7A limit, providing margin against drift while staying within safe SOA.

Can the PG pin drive an MCU GPIO directly without external pull-up?

Yes - the PG pin is a push/pull output capable of sourcing ≥3.2V at V_CC = 3.3V and sinking 0.3V at 1mA. It interfaces directly with 3.3V-tolerant MCU inputs; no external pull-up is needed, simplifying layout and reducing component count in space-constrained modules.

What is the thermal impact of tying NC pins to V_OUT?

Tying Pins 7, 8, and 10 to V_OUT improves thermal conduction from the die to the PCB copper pour, lowering θ_JA by up to 8°C/W in typical layouts. This extends safe operating area under 0.5A continuous load at +105°C ambient, delaying thermal shutdown onset.

Does the MPQ5071GG-AEC1-Z support reverse current blocking?

No - the device lacks body-diode reverse-blocking capability. When V_OUT > V_IN, current flows freely through the MOSFET's intrinsic diode. For reverse-current protection, an external Schottky diode or dedicated ideal diode controller must be added in series with V_OUT.

How does short-circuit protection behave after the initial 200ns fast-off event?

After fast turn-off, the MOSFET remains disabled for 80µs, then re-enables at reduced current limit. If the short persists, the part cycles between reduced limit and thermal shutdown. Recovery to full preset limit occurs automatically once V_OUT returns to normal and junction temperature falls below 120°C.

Is the exposed thermal pad electrically connected internally?

Yes - the exposed pad is internally connected to VIN. It must be soldered to a large copper pour tied to the main VIN plane to ensure both thermal performance and electrical integrity. Floating or isolated pads degrade θ_JA by >25°C/W and risk reliability failure.