Monolithic Power Systems Inc. MPQ5066GQV-AEC1-Z

Overview

MPQ5066GQV-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified hot-swap protection IC with integrated 7mΩ R_DS(ON) MOSFET, adjustable 5–15A current limit, ±10% current monitor accuracy, and 200ns short-circuit response. It operates from 6V to 28V input, delivers up to 6A continuous output, and is used in automotive infotainment power rails to prevent inrush damage and downstream fault propagation.

For engineers reviewing the MPQ5066GQV-AEC1-Z datasheet, MPQ5066GQV-AEC1-Z pinout, MPQ5066GQV-AEC1-Z application, or MPQ5066GQV-AEC1-Z equivalent, key selection criteria include its AEC-Q100 qualification, programmable auto-retry/latch-off fault behavior, IMON-based current monitoring interface, and QFN-22 (3mm×5mm) thermal performance with exposed VIN pads.

Technical Context

The MPQ5066GQV-AEC1-Z implements a sense-FET current-limit architecture with external R_SET-programmed threshold (5–15A), dual-stage overcurrent protection (20μs primary + 200ns secondary at 25A), and a charge-pump–driven gate that sustains low R_DS(ON) across 6–28V input range. Its internal VCC sub-regulator remains active down to VIN = 5V, enabling PG/FLTB signaling even during brownout.

It integrates three independent fault timers: insertion delay (via TIMER pin capacitor), OCP timeout (200μA charging CT), and restart discharge (0.5μA sink). The AUTO pin configures latch-off (grounded) or hiccup-mode (floating/high) recovery, while damaged-MOSFET detection triggers FLTB if V_OUT > V_IN − 1V during startup.

Key Specifications

Pinout & Package

MPQ5066GQV-AEC1-Z is housed in a thermally enhanced QFN-22 (3mm × 5mm) package with dual exposed VIN pads (pins 21–22) and 0.5mm pitch. The package supports ≥2.7W continuous dissipation at T_A = 25°C (θ_JA = 46°C/W on 4-layer PCB) and enables high-current routing via VOUT pins 13–20 (8 parallel outputs).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hot-swap protection applications.

Compared with TPS25942LMLR and MAX20429BATY+, MPQ5066GQV-AEC1-Z uniquely combines AEC-Q100 Grade 1 qualification, 200ns hardware short protection, and damaged-MOSFET detection - making it the only choice for ASIL-B–aligned automotive power domains requiring fail-safe startup verification.

Availability

MPQ5066GQV-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and ADAS camera module designs requiring stable component supply, AEC-Q100 compliance, and production-ready hot-swap protection.

Supply support for MPQ5066GQV-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 conversion, hot-swap, and motor control solutions for automotive, industrial, and computing markets.

The MPQ5066 product line delivers AEC-Q100–qualified hot-swap controllers optimized for automotive power distribution - emphasizing fast fault response, integrated current monitoring, and robust thermal management in compact QFN packages.

FAQ

What is the minimum soft-start time for MPQ5066GQV-AEC1-Z, and how is it achieved?

Floating the SS pin achieves a minimum soft-start time of approximately 1ms. This occurs because the internal 4μA current source directly charges the MOSFET gate, bypassing the external capacitor-controlled ramp. The 1ms duration ensures rapid yet controlled V_OUT rise without exceeding the 6A current limit during startup into moderate capacitive loads.

How does the MPQ5066GQV-AEC1-Z detect a damaged MOSFET before power-up?

During startup, the device monitors V_OUT relative to V_IN. If V_OUT exceeds V_IN − 1V before the gate is fully driven, it indicates a shorted pass MOSFET. In this case, FLTB asserts low immediately and the MOSFET remains off, preventing unsafe power delivery. This detection occurs prior to normal regulation and is independent of R_SET or timer settings.

Can the PG pin operate when VIN = 0V, and what conditions must be met?

Yes - the PG pin functions with VIN = 0V provided an external pull-up supply (e.g., 3.3V) is applied through a 100kΩ resistor. PG remains low in this state because V_FB < 0.6V and V_GS < 3V. Its open-drain architecture allows system-level power sequencing logic to monitor upstream supply readiness independently of the MPQ5066's input rail.

What is the purpose of the PD pin, and how does its behavior change with connection state?

The PD pin activates an internal 500Ω pull-down resistor between V_OUT and GND when VIN falls below UVLO or EN is within 0.6V of its rising threshold. Connecting PD to V_OUT enables safe discharge of bulk output capacitance during shutdown. Leaving PD floating disables this function entirely, requiring external discharge circuitry if needed.

How is the current limit value calculated using the ISET (RSET) resistor?

The current limit is calculated as I_LIMIT = 0.6V × 20 × 10⁴ / R_SET, where R_SET is in ohms. For example, a 10kΩ resistor yields 12A (0.6 × 200,000 / 10,000). Bench data confirms 12.5A typical at 10kΩ, with tolerance maintained across −40°C to +125°C junction temperature.

Does MPQ5066GQV-AEC1-Z support both 12V and 24V automotive battery systems?

Yes - its 6V to 28V input operating range covers nominal 12V (9–16V) and 24V (18–32V) automotive battery systems, including cold-crank (down to 6V) and load-dump (up to 28V) transients. The 4.15V UVLO rising threshold ensures reliable startup after cranking, while 36V absolute maximum rating protects against transient spikes.