Monolithic Power Systems Inc. MP86998GMJT-Z

Overview

MP86998GMJT-Z 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 TLGA-41 (5mm×6mm) package. It delivers 80A continuous output current, supports 100kHz–3MHz switching frequencies, and features Accu-Sense™ bidirectional current sensing (5μA/A gain) and junction temperature monitoring (8mV/°C) for server core voltage regulation.

For engineers reviewing the MP86998GMJT-Z datasheet, MP86998GMJT-Z pinout, MP86998GMJT-Z application, or MP86998GMJT-Z equivalent, this device is selected for high-density, high-efficiency multi-phase buck converters where precise phase current balancing, cycle-by-cycle over-current protection, and thermal fault reporting are required.

Technical Context

The MP86998 operates as a self-contained half-bridge power stage driven by tri-state PWM inputs, enabling diode emulation mode via middle-voltage or floating PWM signals. Its internal level-shifted gate drivers control integrated HS-/LS-FETs with programmable dead time (2ns rising / 6–28ns falling) and cycle-by-cycle current limiting (110A HS, –35A LS).

It integrates analog sensing functions: IOUT provides proportional current-sense output (0.7–2.1V range, ±400μA max), while TOUT/FLT serves dual purpose-linear temperature reporting (800mV offset at 25°C) and open-drain fault flag (pulled to VDD on OTP, OC, or SW-PGND short).

Key Specifications

Pinout & Package

MP86998GMJT-Z uses a TLGA-41 (5mm×6mm) thermally enhanced land-grid array package with exposed PGND pads for low-inductance, high-current routing and optimized thermal dissipation. The package includes dedicated VIN, PGND, and SW power planes alongside analog-signal pins isolated for noise immunity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP86956GMJT-Z, the MP86998GMJT-Z provides 33% higher current headroom and 15% better thermal resistance-critical for sustained 80A operation in air-cooled server environments. Against ISL99390HRZ-T, it consolidates temperature sensing and fault identification into one pin, reducing system-level component count and diagnostic complexity.

Availability

MP86998GMJT-Z is available at Aetrix Electronics and suitable for server core voltage regulation, AI accelerator GPU power delivery, and high-density power module development requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MP86998GMJT-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 power management ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and power stages.

The MP86998 belongs to MPS's Intelli-Phase™ family-designed specifically for high-efficiency, high-current, multi-phase VR applications in datacenter and AI hardware where integration, accuracy, and reliability are non-negotiable.

FAQ

What is the recommended input capacitance layout for MP86998GMJT-Z?

Place eight or more 0805/0402 MLCCs (total ≥47μF) directly adjacent to VIN and PGND pins, using multiple vias per pad to inner-layer power/ground planes. The PCB stack should use a positive/negative/positive layer arrangement with a dedicated VIN plane on Layer 2 to minimize loop inductance below 0.3nH-critical for stable 80A switching at 3MHz.

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

When PWM is held within 1.10–1.80V (tri-state window) for ≥40ns, the HS-FET turns off immediately and the LS-FET enters diode emulation-conducting only during positive inductor current and turning off at zero-crossing. This eliminates reverse recovery losses and improves light-load efficiency without requiring external ZCD circuitry.

Can MP86998GMJT-Z be used in single-phase applications without a controller?

No. The MP86998GMJT-Z is a driver/power stage only and requires an external PWM controller (e.g., MP2960, ISL68127, or digital VR controller) to generate the tri-state PWM signal, interpret IOUT feedback, and manage multi-phase sequencing. It does not include internal PWM generation or regulation logic.

What is the maximum allowable voltage on the IOUT pin, and how is it protected?

The IOUT pin operates within 0.7V–2.1V for accurate current sensing; exceeding 2.1V risks measurement error, but the pin has no internal clamp. Protection relies on external RIOUT resistor selection and reference voltage (VCM) placement per Equation (1) in the datasheet-ensuring IOUT stays within its linear range for ±400μA output (±80A full scale).

How does the TOUT/FLT pin differentiate between over-temperature and over-current faults?

After a fault occurs, the MP86998 pulls TOUT/FLT to VDD and simultaneously alters PWM pin resistance: 10kΩ to AGND indicates HS over-current, 20kΩ to AGND indicates over-temperature (>160°C), and 1kΩ to VDD indicates SW-to-PGND short. This allows the host controller to identify fault type using only one ADC channel and one GPIO.

Is the MP86998GMJT-Z RoHS and REACH compliant?

Yes. MP86998GMJT-Z is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full compliance documentation, including material declarations and test reports, is available through MPS's Quality Assurance portal.

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

The MP86998GMJT-Z supports a minimum 20ns PWM pulse width. This enables stable operation at high switching frequencies (up to 3MHz) and fine-grained duty-cycle control down to ~0.6% at 3MHz-essential for achieving tight output voltage regulation (e.g., 0.8V ±10mV) in modern CPU/GPU VRs with aggressive droop requirements.