Monolithic Power Systems Inc. MP5077GG-Z

Overview

MP5077GG-Z from Monolithic Power Systems is a 5.5V, 7A programmable load switch with integrated 10mΩ DMOS FET, soft-start control via external capacitor, output discharge, and fast 200ns short-circuit protection. It operates across 0.5V–5.5V input range and delivers precise current limiting via ILIM pin resistor for portable power rail management in battery-powered systems.

For engineers reviewing the MP5077GG-Z datasheet, MP5077GG-Z pinout, MP5077GG-Z application, or MP5077GG-Z equivalent, key selection criteria include adjustable 7A current limit (±10% typical), <1µA shutdown current, thermal shutdown at 155°C with 30°C hysteresis, and QFN-12 (2mm×2mm) package compatibility with high-density PCB layouts.

Technical Context

The MP5077GG-Z implements a sense-FET-based current-limit architecture where the ILIM pin sets threshold via external resistor (e.g., 10.5kΩ yields ~7A), and internal charge pump enables full gate drive for low R_DS(ON). Its soft-start function uses a 9µA internal current source charging an external SS capacitor to control V_OUT slew rate at 3× the SS voltage ramp.

Short-circuit response employs dual-stage protection: primary regulation at programmed limit (~7A) with ~20µs loop response, and secondary fast-turnoff at ~13A with 200ns total latency. Output discharge activates via internal 200Ω pull-down when EN is deasserted or V_CC drops below UVLO (2.6V–2.8V).

Key Specifications

Pinout & Package

MP5077GG-Z is housed in a thermally enhanced 12-pin QFN package measuring 2mm × 2mm with 0.4mm pitch and exposed thermal pad. Pin 12 is NC (no connect); pins 6/11 are paralleled VIN inputs; pins 7–10 are paralleled VOUT outputs for low-impedance load connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar load switch applications.

Compared with TPS22992DNYR and NIS5020MN, MP5077GG-Z uniquely combines programmable current limiting, integrated soft-start, output discharge, and certified safety in a 2mm×2mm footprint-enabling single-chip compliance with stringent portable device power integrity standards.

Availability

MP5077GG-Z is available at Aetrix Electronics and suitable for notebook power rails, tablet USB-C port protection, and solid-state drive power sequencing requiring stable component supply across extended production lifecycles.

Supply support for MP5077GG-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 20 years of expertise in DC/DC converters, load switches, and motor drivers.

The MP5077 belongs to MPS's high-efficiency load switch product line, engineered specifically for space-constrained, battery-operated applications demanding precise inrush control, ultra-low quiescent current, and safety-certified operation.

FAQ

What is the maximum continuous output current supported by MP5077GG-Z?

The MP5077GG-Z supports up to 7A continuous output current when properly heatsinked on a 4-layer PCB with ≥6 thermal vias to internal ground plane. At ambient temperatures above 60°C, derating applies per θ_JA = 80°C/W; full 7A is guaranteed only up to +85°C ambient with adequate copper area.

How does the ILIM resistor value affect current limit accuracy?

The ILIM resistor sets current limit using ILimit = (1/RLimit) × S, where S ≈ 82,000 at VIN = 3.6V. Accuracy depends on resistor tolerance (±1% recommended) and S variation: ±5% over VIN = 1.2V–5.5V, ±8% below 1.2V. For 7A target, 10.5kΩ yields 1.54–1.74A typical range per datasheet Table 1.

Can MP5077GG-Z operate with VIN below 1.0V?

Yes-MP5077GG-Z functions down to 0.5V VIN, but current sense ratio S shifts from ~82,000 to ~80,000 below 1.2V, causing ~2.5% reduction in programmed current limit. VCC must still be ≥3V for control circuit operation; separate bias supply is required if VIN < 3V.

Is the NC pin (Pin 12) safe to leave unconnected on PCB?

Yes-Pin 12 is designated NC (no connect) in the official MPS datasheet Rev. 1.2. It serves only for factory testing and must remain electrically floating with no trace, pad, or solder mask opening. Connecting it risks undefined behavior or latch-up due to internal test circuitry.

What is the minimum recommended SS capacitor value and why?

MPS specifies a minimum 4.7nF SS capacitor to ensure stable soft-start behavior. Smaller values cause insufficient SS voltage ramp time, resulting in uncontrolled VOUT rise governed solely by MOSFET gate charge time-potentially violating inrush limits and triggering premature current limiting.

Does MP5077GG-Z require external components for basic operation?

Yes-basic operation requires four external components: ILIM resistor (sets current limit), SS capacitor (controls soft-start), input bypass capacitor on VCC (≥1µF ceramic), and output bulk capacitor (value depends on load). No bootstrap or gate-drive components are needed due to integrated charge pump.

How does thermal shutdown interact with short-circuit events?

During sustained short-circuit, the 200ns fast-turnoff cycles every 80µs until thermal shutdown triggers at 155°C. After shutdown, the device remains off until junction cools by 30°C (to 125°C), then auto-restarts. This prevents thermal runaway while allowing recovery once fault clears.