Monolithic Power Systems Inc. MP86998GMJT-P

Overview

MP86998GMJT-P from Monolithic Power Systems is a monolithic half-bridge Intelli-Phase™ power stage integrating high-side and low-side MOSFETs, gate drivers, Accu-Sense™ current sensing, temperature sensing, and fault reporting in a single TLGA-41 (5mm×6mm) package. It delivers 80A continuous output current, operates from 3V–16V input, supports 100kHz–3MHz switching, and features tri-state PWM compatibility for diode emulation mode - optimized for server core voltage regulation.

For engineers reviewing the MP86998GMJT-P datasheet, MP86998GMJT-P pinout, MP86998GMJT-P application, or MP86998GMJT-P equivalent, key selection criteria include its integrated 80A current capability, ±35A valley current limit with 200ns LS-FET off-time, 2–6ns dead time control, 5μA/A current-sense gain accuracy (±2%), and dual-function TOUT/FLT pin for junction temperature monitoring (8mV/°C) and fault flagging.

Technical Context

The MP86998 implements a monolithic half-bridge architecture with co-packaged HS-/LS-FETs and drivers, eliminating external gate drive loop inductance and enabling precise dead time control (2ns rising / 6ns falling for positive current). Its tri-state PWM interface directly enables diode emulation by detecting mid-voltage (1.1–1.8V) for ZCD-triggered LS-FET conduction.

Current sensing uses a bidirectional 5μA/A IOUT current source referenced to AGND, supporting real-time phase current balancing and cycle-by-cycle OCP; temperature sensing via TOUT/FLT provides 8mV/°C linear output with 800mV offset at 25°C and latched fault reporting at TJ > 160°C, SW-to-PGND short, or 8-cycle HS overcurrent.

Key Specifications

Pinout & Package

MP86998GMJT-P is housed in a thermally enhanced TLGA-41 package (5mm × 6mm, 0.75mm height) with exposed PGND pads on the bottom for low θJB (2.7°C/W) and top-side thermal dissipation (θJC_TOP = 12.4°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDA21472 and NCP302155, MP86998GMJT-P uniquely combines 80A current, tri-state PWM-enabled diode emulation, and dual-function TOUT/FLT with ±2% current sense accuracy - making it optimal for high-performance server and AI power stages demanding compactness, telemetry, and autonomous fault handling.

Availability

MP86998GMJT-P is available at Aetrix Electronics and suitable for server core voltage regulation, GPU power delivery, AI accelerator modules, and high-density telecom VRMs requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for MP86998GMJT-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 design expertise in DC/DC converters, motor drivers, and integrated power stages since 1997.

The MP86998 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 robustness, and real-time telemetry.

FAQ

What is the maximum recommended PCB temperature rise for MP86998GMJT-P under 80A continuous load?

At 80A continuous output with proper 14× PGND vias, 6× VIN vias, and inner-layer copper planes, the MP86998GMJT-P achieves ≤25°C temperature rise above ambient (TA = 70°C) due to its 2.7°C/W θJB and optimized TLGA-41 thermal path. Thermal simulation using MPS's recommended layout yields junction temperatures below 125°C at 70°C ambient.

How does the tri-state PWM feature enable diode emulation without controller modifications?

The MP86998GMJT-P detects PWM voltages between 1.1V–1.8V as "tri-state" and automatically enters diode emulation mode: LS-FET turns on during positive inductor current and turns off at zero-crossing. No controller firmware change is needed - simply float PWM or bias it to ~1.5V using the internal 6kΩ pull-up/5kΩ pull-down network.

Can the IOUT pin be used for closed-loop current-mode control?

Yes - IOUT provides a bidirectional 5μA/A current source proportional to inductor current, with ±2% gain accuracy from 20A–80A. When paired with a precision external resistor (e.g., 200Ω), it generates a 0.7–2.1V analog voltage compatible with most controller ADC inputs for real-time current-mode feedback and phase balancing.

What happens during an SW-to-PGND short fault, and how is it cleared?

Upon SW-to-PGND short detection, MP86998GMJT-P latches off the HS-FET, pulls PWM to 1kΩ-to-VDD to signal the fault type, and holds TOUT/FLT at VDD. Recovery requires toggling EN or cycling VIN/VDD power - no external reset signal is needed, and the latch prevents repeated short-circuit stress.

Is the BST capacitor value fixed, or can it be optimized for different frequencies?

The BST capacitor must be 0.1µF–0.22µF ceramic (X7R, 16V+ rating), placed within 2mm of BST and PHASE pins. At 3MHz, 0.1µF is preferred for lower ESR; at 100kHz, 0.22µF improves charge retention. Deviating outside this range risks insufficient gate drive voltage or excessive ringing during HS turn-on.

Does MP86998GMJT-P support multi-phase current sharing without external current-sense resistors?

Yes - each MP86998GMJT-P provides matched ±2% Accu-Sense™ current output (IOUT) referenced to AGND. By routing IOUT signals to a common summing node or controller ADC, phase currents can be compared and balanced in real time, eliminating the need for lossy, board-area-consuming shunt resistors.

What is the minimum PWM pulse width supported, and why is it important?

The MP86998GMJT-P supports a minimum 20ns PWM pulse width, enabling stable operation at 3MHz (333ns period) with ≥6% duty cycle resolution. This ensures precise low-duty-cycle control for sub-1V core rails and avoids pulse skipping or instability during deep C-states in modern CPUs.