Monolithic Power Systems Inc. MP86956GMJ-P

Overview

MP86956GMJ-P from Monolithic Power Systems is a monolithic half-bridge Intelli-Phase™ power stage integrating high-side and low-side MOSFETs with gate drivers in a single LGA-41 (5mm × 6mm) package. It delivers 70A continuous output current, operates from 3V to 16V input, supports 100kHz–3MHz switching, and features Accu-Sense™ bidirectional current sensing and junction temperature monitoring - optimized for server core voltage regulation.

For engineers reviewing the MP869556GMJ-P datasheet, MP86956GMJ-P pinout, MP86956GMJ-P application, or MP86956GMJ-P equivalent, key selection criteria include tri-state PWM compatibility, ±35A/110A current limit thresholds, 2–28ns programmable dead time, thermal shutdown at 160°C, and integrated fault reporting via TOUT/FLT pin.

Technical Context

The MP86956GMJ-P implements a fully integrated half-bridge topology with internal HS/LS FETs and driver logic, eliminating external gate drive components and minimizing parasitic inductance. Its tri-state PWM interface enables diode emulation mode for light-load efficiency, while cycle-by-cycle current limiting and zero-current detection (ZCD) support precise multi-phase current balancing.

Thermal management is enabled by dual-sense functionality on the TOUT/FLT pin (8mV/°C gain, 800mV offset at 25°C), which transitions to VDD-level fault signaling during over-temperature (>160°C), HS over-current (8-cycle latch), or SW–PGND short events. The IOUT pin provides 5μA/A proportional current sense with ±2% gain accuracy across 20–70A.

Key Specifications

Pinout & Package

LGA-41 (5mm × 6mm) package with exposed thermal pad on bottom; pin 1 marked by index area; JEDEC MO-303 compliant; lead coplanarity ≤ 0.10mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge power stage applications.

Compared with MP86956GMJT, the MP86956GMJ-P offers higher thermal resistance to top but lower cost and wider availability; versus MP86957GMJ-P, it provides tighter current sense accuracy and lower conduction loss at 70A, making it optimal for mainstream server VRMs.

Availability

MP86956GMJ-P is available at Aetrix Electronics and suitable for server core voltage regulation, GPU power delivery, and high-density power modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP86956GMJ-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, with over 20 years of expertise in DC/DC conversion, motor control, and power modules.

The MP86956 belongs to MPS's Intelli-Phase™ family - engineered specifically for high-current, high-frequency multiphase buck regulators in datacenter and AI infrastructure, emphasizing integration, thermal intelligence, and system-level fault resilience.

FAQ

What is the maximum allowable input voltage for MP86956GMJ-P?

The absolute maximum VIN is 18V DC, but the recommended operating range is 3.0V to 16V. Exceeding 16V risks violating the VIN-to-VPHASE rating (−0.3V to 25V DC), especially during switching transients. Operation above 16V voids guaranteed performance and may trigger UVLO or damage internal structures.

How does the tri-state PWM function enable diode emulation mode?

When PWM is driven to 1.1–1.8V (tri-state window) or left floating, the internal current source pulls it to ~1.4V, turning off the HS-FET and enabling LS-FET conduction during positive inductor current. The LS-FET turns off automatically at zero-current crossing, eliminating body-diode conduction losses without external ZCD circuitry.

Can MP86956GMJ-P be used in single-phase applications without a multi-phase controller?

Yes - it functions as a standalone half-bridge stage with tri-state PWM input, current sense (IOUT), and thermal/fault reporting (TOUT/FLT). External controllers such as TI's UCD90x or Infineon's IR352xx can directly interface using standard PWM, EN, and analog sense signals without modification.

What is the purpose of the 2.2Ω resistor between VDRV and VDD?

The 2.2Ω resistor isolates VDRV (driver supply) from VDD (logic supply) to prevent gate-drive noise from coupling into the analog and digital control circuits. This improves PWM timing stability, reduces IOUT offset drift, and maintains clean EN and fault reporting behavior under high dI/dt conditions.

How is over-temperature protection implemented and reset?

Over-temperature protection triggers at TJ = 160°C, latching off the HS-FET and pulling TOUT/FLT to VDD. The fault persists until EN is toggled low-high or VIN/VDD is power-cycled. No automatic recovery occurs - this ensures thermal safety before resuming operation.

What layout practices minimize switching losses and EMI in MP86956GMJ-P designs?

Key practices include placing input MLCCs directly on VIN/PGND pads, using ≥8 vias per PGND pad, routing BST and VDRV caps within 2mm of their pins, avoiding vias in the BST path, and separating IOUT traces from SW/PWM nodes by ≥3mm. A solid inner-layer VIN plane (positive/negative/positive stackup) reduces input loop inductance by >60%.

Is MP86956GMJ-P pin-compatible with earlier revisions like MP86956GMJ?

Yes - MP86956GMJ-P is a qualified production version of MP86956GMJ with identical pinout, electrical specs, and thermal characteristics. The "-P" suffix denotes enhanced manufacturing screening and extended temperature validation per Rev. 1.3, with no functional or mechanical changes.