Monolithic Power Systems Inc. MP86883GQKT-Z

Overview

MP86883GQKT-Z from Monolithic Power Systems is a monolithic half-bridge Intelli-Phase™ solution integrating high-side and low-side power MOSFETs with gate drivers in a single TQFN-34 (6mm × 6mm) package. It delivers 55A continuous output current, operates from 4.5V–14V input, supports 100kHz–1MHz switching, and features integrated current/temperature sensing for server core voltage regulation.

For engineers reviewing the MP86883GQKT-Z datasheet, MP86883GQKT-Z pinout, MP86883GQKT-Z application, or MP86883GQKT-Z equivalent, key selection criteria include tri-state PWM compatibility, ±4% current sense accuracy at 30A, 170°C over-temperature latch threshold, dead-time control (3ns rising / 8ns falling), and bootstrap-based high-side drive architecture.

Technical Context

The MP86883GQKT-Z implements a fully integrated half-bridge power stage with level-shifted gate drivers, internal bootstrap circuitry, and analog current/temperature sensing interfaces. Its tri-state PWM input enables seamless integration with multi-phase VR controllers like MP2935, while the FAULT# open-drain output reports HS overcurrent, VDD UVLO, and thermal shutdown events.

It uses a bi-directional current sense output (CS) with 10μA/A gain referenced to inductor current, and a junction temperature-sensing VTEMP pin with 10mV/°C slope and –100mV offset - enabling precise per-phase current balancing and thermal monitoring in high-density server VRMs without external DCR sensing networks.

Key Specifications

Pinout & Package

TQFN-34 (6mm × 6mm) package with exposed thermal pad; 34-pin layout optimized for low-inductance power loop routing and thermal dissipation via PCB copper planes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP86883GQKT-Z, MP86957GQKT-Z offers higher current capacity but requires CS gain adjustment, while ISL99390IRZ-T omits VTEMP and tri-state functionality - making MP86883GQKT-Z optimal for thermally aware, multi-phase server VRMs needing precise per-phase current and temperature visibility.

Availability

MP86883GQKT-Z is available at Aetrix Electronics and suitable for server core voltage regulation, GPU power delivery, and high-density power modules requiring stable component supply, full RoHS compliance, and long-term lifecycle support.

Supply support for MP86883GQKT-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 analog and power ICs, with leadership in DC/DC conversion, motor drivers, and power modules.

The MP86883 belongs to MPS's Intelli-Phase™ family - engineered specifically for high-current, high-frequency multi-phase VRMs in datacenter and workstation applications where integration, thermal visibility, and current sensing accuracy are critical.

FAQ

What is the recommended bootstrap capacitor value for MP86883GQKT-Z?

The datasheet specifies a 0.22µF to 1µF ceramic capacitor between BST and SW pins. A 0.47µF X7R 16V capacitor placed adjacent to the device is optimal for stable high-side gate drive across 100kHz–1MHz operation, minimizing voltage droop during high-duty-cycle conditions.

How does the CS pin interface with a VR controller?

The CS pin outputs a bi-directional current proportional to inductor current (10μA/A). It connects to a controller's current-sense ADC input through an external resistor (RCS), with VCS maintained between 1V–3.5V. This enables cycle-by-cycle OCP, phase current balancing, and active voltage positioning without DCR sensing components.

Can MP86883GQKT-Z operate in diode emulation mode?

Yes - driving the SYNC pin low disables the low-side FET after inductor current crosses zero, enabling diode emulation. This reduces light-load losses in server VRMs and is controlled directly by the VR controller without additional logic, supporting Intel VR12.5/VR13 and AMD protocols.

What thermal derating applies above 25°C ambient?

With θJA = 29°C/W on a 4-layer PCB, maximum continuous power dissipation decreases linearly: PD(MAX) = (125°C – TA)/29. At 85°C ambient, PD(MAX) drops to ~1.38W - requiring careful thermal design using the exposed pad, PGND vias, and copper area to sustain 55A output.

Is the FAULT# signal latched or auto-recovering?

FAULT# is latched on HS overcurrent, VDD UVLO, or overtemperature events. Recovery requires toggling EN or recycling VDD - ensuring persistent fault indication until deliberate system intervention, which prevents uncontrolled restarts during thermal or overcurrent faults.

Does MP86883GQKT-Z support multi-phase synchronization?

Yes - the SYNC pin accepts external synchronization signals and supports phase interleaving when used with multi-phase controllers like MP2935. Synchronization ensures uniform switching across phases, reducing input/output ripple and improving overall VRM efficiency and thermal distribution.