Monolithic Power Systems Inc. MP5990GMA-0000-Z

Overview

MP5990GMA-0000-Z from Monolithic Power Systems is a fully integrated, PMBus-compatible hot-swap protection IC with an embedded 1mΩ high-side MOSFET, designed for backplane power management in live-insertion systems. It delivers up to 50A continuous output current at room temperature (60A with airflow), supports 4V–16V input, and provides real-time telemetry including VIN, IOUT, VOUT, PIN, POUT, and EIN via PMBus. It is deployed in server blade slots and telecom line cards to prevent inrush-induced voltage droop and system reset.

For engineers reviewing the MP5990GMA-0000-Z datasheet, MP5990GMA-0000-Z pinout, MP5990GMA-0000-Z application, or MP5990GMA-0000-Z equivalent, key selection criteria include its integrated RDS(ON), Intelli-Fuse junction temperature monitoring, configurable OCP/SCP latching modes, NVM-stored configuration, and multi-phase parallel operation capability with MP5991.

Technical Context

The MP5990 implements a closed-loop gate-drive architecture that regulates MOSFET conduction by dynamically adjusting VGATE based on sensed IMON and CS signals, enabling precise inrush control and fast short-circuit response (<200ns). Its dual-reference DACs (OCREF and SCREF_OCWREF) independently set over-current and short-circuit thresholds, while FLT_TYPE and GOK pins provide fault-type discrimination and multi-phase fault propagation.

It integrates a 10-bit ADC for VINSEN, VOSEN, and VTEMP sensing, plus a 6-bit DAC for OCREF and SCREF, all referenced to a 1.76V internal bandgap. The PMBus interface complies with SMBus 3.0 and PMBus 1.3, supporting 10–1000kHz clock rates and full telemetry readback, register configuration, and nonvolatile fault logging.

Key Specifications

Pinout & Package

LGA-45 (5mm × 7mm) package with exposed thermal pad; designed for low-inductance, high-current PCB layout and forced-air or natural convection cooling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar intelligent hot-swap applications.

Compared with TPS2491RGER and LTC4232IMS-1#PBF, MP5990GMA-0000-Z uniquely combines integrated 1mΩ FET, ±1% IMON telemetry, PMBus 1.3 compliance, and multi-phase master/slave coordination - delivering higher current density, lower system BOM cost, and richer diagnostics for modern data center and telecom infrastructure.

Availability

MP5990GMA-0000-Z is available at Aetrix Electronics and suitable for server blade hot-swap, 5G base station line cards, and networking switch fabric modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MP5990GMA-0000-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP5990 belongs to MPS's Intelli-Fuse product line, engineered specifically for intelligent, telemetry-enabled hot-swap protection in high-availability computing and communications infrastructure where reliability, configurability, and system-level power visibility are critical.

FAQ

What is the maximum continuous output current rating for MP5990GMA-0000-Z?

The MP5990GMA-0000-Z delivers 50A continuous output current at ambient temperature (TA = 25°C) with no airflow. With 100 ft/min airflow, it supports up to 60A. This rating assumes proper PCB thermal design per the EV5990 evaluation board layout (4-layer, 2oz copper, 11cm×15cm).

Does MP5990GMA-0000-Z require an external current-sense resistor?

No. The MP5990GMA-0000-Z integrates a precision current mirror and IMON output with ±1% reporting accuracy, eliminating the need for an external shunt resistor. The IMON pin delivers 10 µA/A proportional current, which can be converted to voltage using a simple RC network for ADC measurement.

How does the MP5990 handle short-circuit faults?

It detects short circuits within 200ns using the CS pin and SCREF_OCWREF DAC. Upon detection, it enters latch-off mode unless configured for hiccup or retry. Fault type is reported via FLT_TYPE analog voltage (1.5V for SCP) and logged in NVM. GOK asserts low to signal upstream controllers and disable slave phases.

Can MP5990GMA-0000-Z operate in parallel with other devices?

Yes. It functions as a master Intelli-Fuse controller in parallel with up to four MP5991 slave devices. GOK and FLT_TYPE pins form a wired-OR fault bus, enabling coordinated shutdown and unified fault reporting across all phases without external arbitration logic.

What package type and thermal characteristics does MP5990GMA-0000-Z use?

It uses an LGA-45 (5mm × 7mm) package with exposed thermal pad. Thermal resistance is θJA = 22.9°C/W and θJC = 10.1°C/W on a 4-layer JEDEC-standard PCB. The VTEMP pin provides junction temperature sensing at 8.7 mV/°C, enabling real-time thermal derating without external sensors.

Is NVM write protection available on MP5990GMA-0000-Z?

Yes. The device includes hardware NVM write protection activated via the MODE pin configuration. Once enabled, register settings stored in NVM (including OCP thresholds, soft-start time, PMBus address, and fault response modes) cannot be overwritten without explicit unlock sequence, ensuring configuration integrity in production environments.

What PMBus telemetry parameters are supported by MP5990GMA-0000-Z?

It reports VIN, IIN, EIN, VOUT, IOUT, PIN, and POUT via PMBus READ commands. All values are calibrated and accessible in real time. Energy (EIN) is accumulated in 16-bit registers with rollover handling; power values are calculated from simultaneous voltage/current samples with <1% error across operating range.