Monolithic Power Systems Inc. MP5077GG-P

Overview

MP5077GG-P 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 function, and <200ns short-circuit response time. It operates across 0.5V–5.5V input range, delivers <1µA shutdown current, and is used for power rail sequencing in portable computing and SSDs.

For engineers reviewing the MP5077GG-P datasheet, MP5077GG-P pinout, MP5077GG-P application, or MP5077GG-P equivalent, key selection criteria include adjustable current limit (via ILIM resistor), thermal shutdown threshold (155°C), VCC UVLO (2.6–2.8V), soft-start slew rate control, and QFN-12 (2mm×2mm) package thermal performance.

Technical Context

The MP5077GG-P uses a sense-FET topology to implement precise, resistor-programmable current limiting (1.54–1.74A typical at RLIM = 50kΩ), with fast 20µs regulation response and secondary 13A short-circuit cutoff. Its internal charge pump enables full enhancement of the low-R_DSON power FET across the entire 3V–5.5V V_CC range.

Soft-start is controlled by a 9µA internal current source charging an external capacitor on the SS pin, producing a 3× voltage ramp gain to V_OUT; output discharge is enabled via a 200Ω internal pull-down activated during disable. Thermal protection includes 155°C shutdown with 30°C hysteresis.

Key Specifications

Pinout & Package

MP5077GG-P is housed in a thermally enhanced 12-pin QFN package measuring 2mm × 2mm with 0.4mm pitch and exposed thermal pad. The package supports high-density PCB layouts and efficient heat dissipation in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22919DNYR and NIS5020MN, MP5077GG-P uniquely combines programmable current limiting, sub-200ns fault response, integrated discharge, and CB certification - making it optimal for compact, safety-critical portable power architectures.

Availability

MP5077GG-P is available at Aetrix Electronics and suitable for notebook power sequencing, tablet SoC domain switching, and SSD VDD management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP5077GG-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 for computing, automotive, and industrial markets, with design centers in the US, China, and Taiwan.

The MP5077 belongs to MPS's load switch product line, engineered specifically for space-constrained, battery-operated devices demanding ultra-low quiescent current, precise current limiting, and robust fault protection without external components.

FAQ

What is the minimum recommended soft-start capacitor value for MP5077GG-P?

The datasheet specifies a minimum soft-start capacitor of 4.7nF. Using smaller values risks uncontrolled V_OUT rise time due to insufficient SS pin voltage ramping, potentially triggering current limiting during startup. A 10nF–100nF range is typical for balancing inrush control and startup speed in portable applications.

How does the ILIM resistor affect current limit accuracy across temperature?

Current limit accuracy depends on the ILIM resistor's tolerance and temperature coefficient. At 25°C, MP5077GG-P achieves ±6% current limit accuracy with a 1% resistor. Over –40°C to +125°C, total error increases to ±12% due to internal sense ratio drift and resistor TC - use 0.1% thin-film resistors for critical applications.

Can MP5077GG-P operate with V_CC supplied from the same rail as V_IN?

Yes - V_CC may be tied directly to V_IN if V_IN remains within 3V–5.5V. However, this configuration forfeits independent bias control and may compromise UVLO behavior during low-V_IN conditions. For 0.5V–3V inputs, a separate regulated V_CC source is mandatory.

Does the output discharge function activate during thermal shutdown?

Yes - the output discharge function remains active whenever EN is low or V_CC falls below UVLO, including during thermal shutdown recovery. The 200Ω internal pull-down engages automatically to dissipate stored charge on V_OUT capacitors, preventing unintended re-powering or latch-up.

What is the maximum allowable power dissipation for MP5077GG-P in its QFN-12 package?

At 25°C ambient, the QFN-12 package supports 1.6W continuous power dissipation (θ_JA = 80°C/W). At 7A and 10mΩ R_DSON, conduction loss is 490mW - well within thermal limits. Derate linearly above 25°C; full 7A operation is sustainable up to +85°C ambient with proper PCB copper area and vias.

Is MP5077GG-P compatible with lead-free reflow profiles?

Yes - MP5077GG-P is qualified for standard IPC/JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260°C. The QFN-12 package uses matte tin plating and meets RoHS Directive 2011/65/EU requirements. No special pre-bake or moisture sensitivity handling is required.

How does short-circuit recovery work after fast-turn-off activation?

After the <200ns fast turn-off triggers, MP5077GG-P holds the FET off for 80µs, then attempts automatic restart. If the short persists, it reduces the current limit to 2/3 of the programmed value and repeats the cycle until thermal shutdown occurs. Recovery is fully autonomous - no external reset needed.