Monolithic Power Systems Inc. MP86883GQKT-P

Overview

MP86883GQKT-P from Monolithic Power Systems is a monolithic half-bridge Intelli-Phase™ solution integrating high-side and low-side MOSFETs with gate drivers in a single TQFN-34 (6mm × 6mm) package. It delivers 55A continuous output current, operates from 4.5V to 14V input, supports 100kHz–1MHz switching, and features integrated current sense (±4% accuracy at 30A), temperature sense (10mV/°C), and tri-state PWM interface - optimized for server core voltage regulation.

For engineers reviewing the MP86883GQKT-P datasheet, MP86883GQKT-P pinout, MP86883GQKT-P application, or MP86883GQKT-P equivalent, key selection criteria include its 55A continuous current rating, built-in bootstrap switch, fault reporting via open-drain FAULT# pin, and compatibility with multi-phase VR controllers requiring precise per-phase current and thermal monitoring.

Technical Context

The MP86883GQKT-P implements a fully integrated half-bridge power stage with synchronous rectification, dead-time control (3ns rising / 8ns falling), and internal level-shifting for high-side drive. Its block diagram confirms independent HS/LS FET control, cycle-by-cycle overcurrent protection (80A HS / –30A LS), and analog current sensing referenced to SW node with 10μA/A gain.

It interfaces directly with tri-state PWM controllers (e.g., MP2935), supports diode emulation mode via SYNC pin, and provides real-time junction temperature monitoring through VTEMP (–100mV offset +10mV/°C). Thermal shutdown triggers at 170°C with 30°C hysteresis, and fault latching requires EN or VDD toggle to reset.

Key Specifications

Pinout & Package

TQFN-34 (6mm × 6mm) package with exposed thermal pad; 34-pin layout optimized for high-current routing and thermal dissipation. Pin numbering follows standard MPS TQFN-34 top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP86883GQKT-P, MP86957GQKT trades thermal telemetry for higher current capacity, while ISL99390HRZ-T reduces size at the cost of added external components and loss of integrated bootstrap functionality - making MP86883GQKT-P optimal for thermally managed, high-density multi-phase server VRMs.

Availability

MP86883GQKT-P is available at Aetrix Electronics and suitable for server core voltage regulation, GPU power delivery, AI accelerator modules, and telecom intermediate bus converters requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for MP86883GQKT-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 analog and mixed-signal ICs for power management, motion control, and automotive applications.

The MP86883 belongs to MPS's Intelli-Phase™ family - designed specifically for high-current, multi-phase DC-DC conversion in datacenter and AI hardware where integration, thermal intelligence, and per-phase telemetry are critical.

FAQ

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

The datasheet specifies a 0.22µF to 1µF ceramic capacitor between BST and SW pins. A 0.47µF X7R 16V capacitor is commonly used to ensure sufficient charge hold-up during high-duty-cycle operation while maintaining low ESR. Values below 100nF are prohibited due to insufficient charge storage for reliable HS gate drive.

How does the MP86883GQKT-P implement diode emulation mode?

Diode emulation is activated by pulling the SYNC pin low. In this mode, the low-side FET turns off after inductor current crosses zero, eliminating reverse-recovery losses. The part monitors SW voltage and disables LS conduction when SW > 1.5V, enabling discontinuous conduction mode (DCM) operation without external control logic.

Can the CS pin be used for overcurrent protection without an external controller?

No - the CS pin provides a 10μA/A analog current signal but does not generate autonomous protection. Overcurrent response (e.g., cycle-by-cycle shutdown) requires an external controller to monitor CS voltage and assert PWM or EN signals. The internal 80A HS and –30A LS limits are hardwired fault triggers, not CS-based decisions.

What is the thermal resistance (θ_JA) of MP86883GQKT-P on a standard 4-layer PCB?

Measured per JESD51-7 on a 4-layer PCB, θ_JA is 29°C/W. This value assumes proper thermal design: exposed pad soldered to internal ground plane with ≥9 thermal vias, 2oz copper, and minimal trace length between IN/PGND/SW. With forced airflow (400 FPM), junction temperature rise drops significantly - enabling full 55A operation at 125°C ambient.

Is the MP86883GQKT-P RoHS-compliant and lead-free?

Yes - all MPS parts, including MP86883GQKT-P, are lead-free and comply with the RoHS directive. The device uses matte tin (Sn) plating on terminals and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 3 requirements. Full compliance documentation is available on the MPS Quality Assurance webpage.

How is the VTEMP pin calibrated for junction temperature measurement?

VTEMP output follows V_TEMP = –100mV + (10mV/°C × T_JUNCTION) for T_JUNCTION > 10°C. At 80°C junction temperature, VTEMP reads 700mV. Measurement must be taken between VTEMP and AGND pins using a high-impedance voltmeter or ADC; readings below 0V indicate T_JUNCTION ≤ 10°C and clamp at 0V.

Does MP86883GQKT-P support parallel operation for higher current?

Yes - the device is explicitly designed for multi-phase operation. Its matched current sense gain (±4%), identical thermal coefficients, and synchronized FAULT# reporting allow direct paralleling of multiple MP86883GQKT-P units under a single VR controller. Phase interleaving is managed externally via PWM timing skew.