Monolithic Power Systems Inc. MP5048GU-P

Overview

MP5048GU-P from Monolithic Power Systems is a monolithic hot-swap Intelli-Fuse IC integrating a 60V-rated, 7mΩ R_DS(ON) high-side MOSFET, current sensing, temperature monitoring, and fault management logic. It delivers up to 15A continuous output current, supports standalone or controller-coordinated operation (e.g., with MP5920), and enables parallel configuration for higher-current systems. It is deployed in server backplane power insertion to limit inrush current and prevent voltage droop during live card insertion.

For engineers reviewing the MP5048GU-P datasheet, MP5048GU-P pinout, MP5048GU-P application, or MP5048GU-P equivalent, key selection considerations include its 24–60V input range, integrated 7mΩ FET, programmable OCP via CLREF, soft-start timing control via SS capacitor, and latch/hiccup mode selection via MODE pin.

Technical Context

The MP5048GU-P implements a high-side e-fuse architecture with internal gate charge pump and adaptive current limiting. Its current regulation uses a CS amplifier comparing V_CS against a clamped or externally set CLREF voltage, enabling dynamic current limit scaling during soft-start and full-scale operation.

It integrates dual protection timers: a 2μA insertion delay timer on TIMER pin and a 40μA over-current timer triggered when V_CS ≥ V_CLREF; both share the same external capacitor. Fault response includes open-drain FAULT assertion, automatic retry (if MODE = low), or latched shutdown (if MODE = high or floating).

Key Specifications

Pinout & Package

MP5048GU-P is housed in a thermally enhanced QFN-30 (5mm × 5mm) package with exposed thermal pad. Pin numbering follows top-view orientation as defined in MPS datasheet Rev. 1.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS23521 and BTS7215L, MP5048GU-P uniquely combines 60V operation, integrated current/temperature sensing, programmable protection timing, and multi-device synchronization-making it optimal for high-reliability, telemetry-enabled hot-swap systems requiring design-in flexibility and diagnostic depth.

Availability

MP5048GU-P is available at Aetrix Electronics and suitable for server backplane power distribution, industrial PLC slot protection, and telecom line card e-fuse applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP5048GU-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 centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP5048GU-P belongs to MPS's Intelli-Fuse™ hot-swap product line, engineered specifically for high-voltage, high-current board-level power insertion with integrated diagnostics, current sharing, and robust fault handling in datacenter and industrial infrastructure.

FAQ

What is the maximum allowable junction temperature and thermal shutdown behavior?

The MP5048GU-P shuts down at 153°C junction temperature. In auto-retry mode (MODE = low), it restarts after a 9-cycle TIMER-based delay (~500ms total). In latch-off mode (MODE = high/floating), it remains disabled until ON is cycled. Thermal hysteresis is 26°C only in auto-retry mode; latch-off requires external reset.

How is current limit configured, and what determines primary vs. secondary trip thresholds?

Primary current limit (e.g., 15.5A) is set by CLREF voltage and RCS resistor value. Secondary limit (26A) activates regardless of RCS and serves as fast short-circuit protection. The CS amplifier compares V_CS to V_CLREF; when exceeded for >20μs (primary) or >200ns (secondary), protection triggers.

Can MP5048GU-P operate without an external microcontroller or hot-swap controller?

Yes. In standalone mode, ON is pulled high to VCC, and protection parameters (OCP, soft-start, retry) are set by external resistors (RCS, RCLREF, RIMON) and capacitors (CSS, CTIMER). No digital interface or firmware is required for basic e-fuse functionality.

What is the purpose of the VTEMP pin, and how is it calibrated?

VTEMP provides a linear analog voltage proportional to junction temperature (≈1.2mV/°C, zero at −40°C). It requires no calibration; typical output is 1.2V at 25°C and 1.8V at 125°C. System ADC reads this to implement thermal derating or alarm thresholds without external sensors.

How does parallel operation ensure balanced current sharing during start-up?

During soft-start, all MP5048GU-P devices in parallel share the same SS node and TIMER capacitor. Their internal charge pumps and current limit references synchronize, forcing identical VOUT ramp rates and gate drive timing-ensuring current divides evenly before steady-state regulation begins.

Is the FAULT pin actively driven or open-drain, and what conditions assert it?

FAULT is an open-drain output requiring external pull-up. It is asserted (pulled low) during over-current (primary or secondary), short-circuit, over-temperature, VOUT < 20% VIN during start-up, or detected FET drain-source/gate-source shorts. It remains low until fault clears and retry completes (or ON is toggled in latch mode).

What is the role of the 3V and VCC pins, and can they be used to power external circuitry?

3V (3V LDO) and VCC (4.5V LDO) are internal regulators intended for biasing internal analog blocks. While 3V can source ≤50mA and VCC ≤100mA, MPS recommends using them only for internal functions unless explicitly validated in application notes-external loads may affect regulation accuracy and thermal performance.