Monolithic Power Systems Inc. MP5990GMA-0000-P

Overview

MP5990GMA-0000-P 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 range, and provides real-time telemetry including VIN, IOUT, POUT, and EIN via PMBus. It is deployed in server blade slots and telecom line cards to prevent inrush-induced voltage droop and system instability.

For engineers reviewing the MP5990GMA-0000-P datasheet, MP5990GMA-0000-P pinout, MP5990GMA-0000-P application, or MP5990GMA-0000-P equivalent, key selection criteria include its integrated RDS(ON), Intelli-Fuse junction temperature monitoring, configurable OCP/SCP latching modes, PMBus telemetry accuracy (±1% IMON), and LGA-45 package thermal performance (θJA = 22.9°C/W).

Technical Context

The MP5990 operates as a standalone e-fuse or master controller in multi-phase configurations with MP5991 slaves, using synchronized GOK fault signaling and shared VTEMP/FLT_TYPE bus for thermal and fault aggregation. Its analog-digital hybrid architecture combines precision current sensing (IMON ±1% gain accuracy), dual DACs for OCREF and SCREF (6-bit resolution, 28mV step), and internal ADCs for VINSEN/VOSEN (10-bit, 780kHz sampling) to enable closed-loop inrush control and real-time power reporting.

It implements adaptive gate drive for the integrated MOSFET via VGATE regulation during soft-start and fault events, with programmable TON_DELAY/TOFF_DELAY, hiccup/retry/latch-off fault responses, and NVM-stored configuration (including -0000 default register map). The device uses VBE-based short-circuit detection (200ns response) and FET drain-source/gate-source short diagnostics with dedicated FLT_TYPE voltage-coded fault identification.

Key Specifications

Pinout & Package

The MP5990GMA-0000-P is housed in an LGA-45 (5mm × 7mm) package with exposed thermal pad, optimized for high-current routing and low-inductance layout. Pin numbering follows top-view orientation per MPS datasheet Rev. 1.11.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2491RGER and LTC4215IMS#PBF, the MP5990GMA-0000-P uniquely integrates MOSFET + driver + NVM + Intelli-Fuse thermal management in one LGA-45 package, delivering higher current density, tighter telemetry accuracy, and true multi-phase scalability - making it optimal for next-gen 5G and AI server platforms.

Availability

MP5990GMA-0000-P is available at Aetrix Electronics and suitable for server blade insertion, 5G baseband unit power sequencing, and network packet processor card hot-swap requiring stable component supply, long-term lifecycle support, and PMBus-compliant telemetry integration.

Supply support for MP5990GMA-0000-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-efficiency power management ICs for computing, telecom, and industrial markets, with design centers in the US, China, and Taiwan.

The MP5990 belongs to MPS's Intelli-Fuse product line, engineered specifically for intelligent, scalable hot-swap protection in high-density, thermally constrained systems such as AI accelerators and 5G radio units - emphasizing integration, telemetry fidelity, and multi-phase coordination.

FAQ

What is the maximum continuous output current rating for MP5990GMA-0000-P under natural convection?

The MP5990GMA-0000-P delivers 50A continuous output current at TA = 25°C with no forced airflow, verified per datasheet Rev. 1.11 Figure 13 (Case Temperature Rise vs. Output Current). This rating assumes use of the recommended 4-layer PCB layout with 2oz copper and thermal vias under the LGA-45 exposed pad.

Does MP5990GMA-0000-P support multi-phase operation with devices from other manufacturers?

No - multi-phase coordination (GOK fault aggregation, VTEMP sharing, FLT_TYPE bus) is proprietary to MPS Intelli-Fuse architecture and validated only with MP5991 slave devices. Interoperability with non-MPS controllers or FET drivers is not supported or characterized.

How is the soft-start time configured, and what is its adjustment range?

Soft-start time (tSS) is set by an external capacitor connected to the SS pin (Pin 16); typical values range from 1ms to 100ms depending on capacitance (e.g., 100nF ≈ 10ms). The internal circuit controls VOUT slew rate to limit inrush di/dt, and tSS is independent of load current or input voltage.

Can the PMBus address be changed after soldering, and how is it programmed?

Yes - the 4 LSB of the PMBus address are set dynamically via the ADDR pin (Pin 23) using a resistor divider from VDD18 to GND. Address changes require only reprogramming the resistor network; no NVM write operation is needed, and the setting persists across power cycles.

What fault conditions trigger the GOK pin, and is it latched by default?

GOK asserts low for input over-voltage (VIN > 20V), output over-current (IOUT > OCREF threshold), short-circuit (ILIMITSC > 100A), over-temperature (TJ > 145°C), and FET health faults. By default, GOK is latched; clearing requires either cycling EN or issuing a PMBus CLEAR_FAULTS command.

Is the -0000 configuration code field-programmable, or is it factory-programmed only?

The -0000 suffix indicates the universal default configuration stored in factory-programmed NVM, including OCP = 50A, soft-start = 10ms, and latch-off fault mode. Custom configurations require MPS FAE support to generate unique "xxxx" codes; field reprogramming of NVM is not user-accessible.

Does MP5990GMA-0000-P provide energy metering, and what is its accuracy over temperature?

Yes - it reports input energy (EIN) with ±2% accuracy over -40°C to +125°C, derived from integrated VIN/IIN sampling and time-stamped accumulation in NVM. EIN resolution is 1mWh, and values persist across power cycles when enabled via PMBus command.