Monolithic Power Systems Inc. MPQ5872GRPE-AEC1-P

Overview

MPQ5872GRPE-AEC1-P from Monolithic Power Systems is a smart high-side load switch IC designed for automotive power distribution. It integrates a 60mΩ N-channel MOSFET, withstands 42V load dump transients, supports 3.5V cold-crank operation, and delivers ±4% current-sense accuracy at 1A - enabling robust protection and real-time diagnostics in ADAS and infotainment power rails.

For engineers reviewing the MPQ5872GRPE-AEC1-P datasheet, MPQ5872GRPE-AEC1-P pinout, MPQ5872GRPE-AEC1-P application, or MPQ5872GRPE-AEC1-P equivalent, this AEC-Q100 Grade 1 qualified device offers configurable current limiting, adjustable slew rate control, fault reporting via FT/CS, and on/off-state open-load detection - all critical for functional safety–compliant vehicle subsystems.

Technical Context

The MPQ5872GRPE-AEC1-P implements a charge-pump–driven N-channel MOSFET gate driver with integrated thermal shutdown (175°C threshold), fast-off response (<1µs), and dual-mode current limiting: fixed 3A internal CL and externally configurable CL via ILIM pin (KCL = 1000, VTH_LIM = 0.7V). Its diagnostics engine monitors both on- and off-state conditions using dedicated DIAG_EN control.

Current sensing uses a precision current mirror (KCS = 1000) referenced to FT/CS, delivering linear 0–3V output proportional to load current (±4% @ 1A, ±6% @ 300mA), while soft-start is controlled by an internal 10µA constant-current source charging an external SS capacitor - enabling programmable VOUT ramp rate without external timing components.

Key Specifications

Pinout & Package

MPQ5872GRPE-AEC1-P is housed in a thermally enhanced QFN-8 package (2mm × 2.5mm, 0.5mm pitch) with exposed thermal pad and wettable flanks for automotive-grade solder joint reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart high-side load switch applications.

Compared with TPS4H160-Q1 and STL300P4-2, MPQ5872GRPE-AEC1-P uniquely combines 42V load-dump tolerance, ±4% current sensing, and 0.5µA standby in a wettable-flank QFN - making it the only option that satisfies full ASIL-B power domain requirements without external components.

Availability

MPQ5872GRPE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control sub-modules requiring stable component supply across extended temperature and transient-voltage operating conditions.

Supply support for MPQ5872GRPE-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-performance power management ICs for automotive, industrial, and consumer applications - with over 20 years of expertise in DC/DC conversion and smart power switches.

The MPQ5872 product line targets functional safety–enabled automotive power distribution, delivering integrated protection, diagnostics, and transient resilience for ASIL-B–compliant subsystems without external support components.

FAQ

What is the maximum load dump voltage the MPQ5872GRPE-AEC1-P can withstand?

The MPQ5872GRPE-AEC1-P is rated for 42V load dump per ISO 7637-2 Pulse 5a, verified across its full operating temperature range (-40°C to +150°C). This rating is achieved without external TVS diodes due to internal process hardening and clamp circuitry - confirmed in MPS datasheet Rev. 1.0, Section "Absolute Maximum Ratings".

How does the FT/CS pin report faults while maintaining current-sense functionality?

The FT/CS pin operates in dual mode: under normal load, it outputs V_CS = I_LOAD/1000 (0–3V linear range); during faults (overcurrent, OTP, open-load, short-to-battery), it pulls up to 4.4V. The transition is monotonic and detectable by a single comparator or ADC threshold - eliminating need for separate fault and sense pins.

Can the MPQ5872GRPE-AEC1-P be used with 3.3V logic-level microcontrollers?

Yes - EN and DIAG_EN inputs accept 3.3V logic directly: their high-threshold is 1.2V (min), low-threshold is 1.0V (max), with 200mV hysteresis. No level-shifting is required, and internal 500kΩ pull-down resistors ensure defined state during MCU reset.

What is the minimum external current limit achievable using the ILIM pin?

The lowest validated external current limit is 500mA, achieved with R_CL ≈ 1.4kΩ (per Equation 2 in datasheet page 18). Below 500mA, accuracy degrades beyond ±15%; for 300mA operation, use internal 3A CL with external current-limiting resistor downstream.

Does the MPQ5872GRPE-AEC1-P support inductive load demagnetization without external freewheeling diodes?

Yes - for inductive loads ≤5mH with peak switch-off current ≤3A, the device safely dissipates demagnetization energy internally. For larger inductances or currents, external freewheeling circuitry (e.g., Schottky clamp) is mandatory per datasheet Section "Inductive Load Switch-Off Clamp".

How is off-state open-load detection enabled and what is its voltage threshold?

Off-state open-load detection activates when DIAG_EN ≥1.2V and EN = 0V. It triggers if V_IN – V_OUT exceeds 1.05V (typical) for >700µs - indicating no load path to ground. The threshold is temperature-stable (±0.3V over -40°C to +150°C) and does not require external components.

Is the QFN-8 package of MPQ5872GRPE-AEC1-P compatible with standard reflow profiles?

Yes - the QFN-8 (2mm × 2.5mm) package has MSL Level 1 rating and is qualified for JEDEC J-STD-020D reflow. Peak temperature (260°C) and thermal profile comply with AEC-Q100 stress testing; wettable flanks ensure reliable solder fillet formation under automated optical inspection.