Monolithic Power Systems Inc. MP5048GU-Z

Overview

MP5048GU-Z from Monolithic Power Systems is a monolithic 60V, 15A hot-swap Intelli-Fuse IC integrating a 7mΩ high-side MOSFET, on-die current sensing, die temperature monitoring, and fault diagnostics. It operates as a standalone e-fuse or under external hot-swap controller sequencing, delivering controlled inrush limiting and over-current/over-temperature protection in server backplane and industrial power distribution systems.

For engineers reviewing the MP5048GU-Z datasheet, MP5048GU-Z pinout, MP5048GU-Z application, or MP5048GU-Z equivalent, key selection considerations include its QFN-30 (5mm×5mm) package, 24–60V input range, 15A continuous output, integrated soft-start timing via SS pin, and configurable latch/hiccup fault response via MODE pin.

Technical Context

The MP5048GU-Z implements a high-side FET gate driver with adaptive current-limit control: CLREF sets the OCP threshold via external resistor, while CS provides real-time current-sense voltage proportional to load current. Its internal 26µA soft-start current source charges an external capacitor to control VOUT slew rate during insertion into live backplanes.

It features dual-mode fault handling-latch-off when MODE is pulled high, auto-retry (9-cycle timer-based reset) when MODE is low-and integrates short-circuit detection with 200ns response time, drain-to-source short flagging at 0.9×VIN, and thermal shutdown at 153°C with 26°C hysteresis in auto-retry mode.

Key Specifications

Pinout & Package

MP5048GU-Z is housed in a thermally enhanced QFN-30 (5mm × 5mm) package with exposed thermal pad (EP), optimized for high-current power delivery and PCB-level heat dissipation. Pin numbering follows top-view layout with pins 1–30 arranged in two rows (1–15 bottom, 16–30 top).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS23730RGER and MP5920GQZ, MP5048GU-Z delivers higher integration (integrated FET + sense + temp), superior thermal performance (7mΩ vs. 12mΩ), and autonomous diagnostics - making it optimal for space-constrained, high-reliability 15A hot-swap nodes where minimizing external components is critical.

Availability

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

Supply support for MP5048GU-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 MP5048GU-Z belongs to MPS's Intelli-Fuse product line, engineered specifically for high-voltage, high-current hot-swap and e-fuse applications in datacenter, industrial, and telecom infrastructure where reliability, integration density, and autonomous protection are paramount.

FAQ

What is the maximum continuous current rating for MP5048GU-Z at 85°C ambient?

The MP5048GU-Z maintains 15A continuous output current at TA = 25°C with proper PCB thermal design (4-layer, 2oz copper). At TA = 85°C, derating applies: based on θJA = 22.4°C/W and TJ(MAX) = 150°C, maximum allowable power dissipation drops to 1.46W, supporting ~12.2A continuous (P = I² × RDS(ON) ≈ I² × 0.009Ω). Full 15A operation requires active cooling or reduced ambient.

Can MP5048GU-Z operate without an external controller in a 48V system?

Yes - MP5048GU-Z supports true standalone operation. Pull the ON pin to VCC (via ≥10kΩ resistor) to enable the internal charge pump and initiate soft-start. The device then autonomously manages inrush limiting, current regulation, and fault response without external sequencing signals.

How does the TIMER pin configure both insertion delay and OCP timeout?

The TIMER pin uses a single external capacitor charged by different current sources: 2µA for insertion delay (starts at UVLO), 40µA for OCP timeout (starts when VCS ≥ VCLREF), and ~500nA for auto-retry cycles. Voltage thresholds (2.4V for delay end, 0.6V for OCP trip) determine functional mode - no external switching is required.

Is the IMON output ratiometric to load current across temperature?

Yes - IMON provides 25µA/A output with ±1.5% gain accuracy from 1A to 15A and -40°C to +125°C junction temperature, as verified in the Electrical Characteristics table. This enables direct ADC sampling for closed-loop current monitoring without calibration per unit or temperature compensation.

What is the recommended minimum trace width for VOUT pins in a 15A application?

For 15A continuous current with ≤30°C temperature rise on 2oz external copper, IPC-2221 recommends ≥100 mil (2.54mm) trace width. However, MP5048GU-Z's 15 parallel VOUT pins (pins 3–17) distribute current - use ≥20 mil traces per pin with thermal vias to inner ground planes to achieve <15°C rise and maintain RDS(ON) stability.

Does MP5048GU-Z support bidirectional current flow?

No - MP5048GU-Z is a unidirectional high-side switch only. Its integrated MOSFET body diode is not rated for reverse conduction, and internal current-sense architecture assumes forward current direction (VIN → VOUT). Reverse current protection requires external circuitry.

How is the CLREF voltage clamped during soft-start?

During soft-start, CLREF is internally clamped to ~660mV (VBE of on-die transistor with negative TC) to limit current until VOUT reaches ≥90% of VIN. Once reached, the clamp releases and CLREF becomes fully determined by the external resistor network, enabling full 15A current capability.