Monolithic Power Systems Inc. MP5086GG-Z

Overview

MP5086GG-Z from Monolithic Power Systems is a 5.5V, 7A load switch with integrated current monitoring (±3% accuracy at 3.75A), NTC-based overtemperature protection (155°C thermal shutdown), and dual-FET architecture (11mΩ main FET, 65Ω bypass FET) in a 2mm×2mm QFN-12 package. It delivers space-efficient power path control for portable devices requiring precise current limiting, fast short-circuit response (<200ns), and battery-life-preserving transportation mode.

For engineers reviewing the MP5086GG-Z datasheet, MP5086GG-Z pinout, MP5086GG-Z application, or MP5086GG-Z equivalent, this device supports critical design tasks including inrush current limiting, real-time load current sensing via IMON, thermistor-based thermal threshold setting, and fail-safe OTP latching - all within a compact footprint suitable for high-density mobile PCBs.

Technical Context

The MP5086GG-Z implements a dual-MOSFET architecture: an ultra-low-R_DS(ON) (11mΩ @ 3.3V) main NFET for primary load switching and a dedicated PFET (65Ω) for low-current bypass operation. Its current monitor outputs a voltage proportional to load current with programmable gain via external R_IMON, enabling accurate real-time sensing without shunt resistors.

Thermal management integrates both analog NTC comparator logic (triggering at 20% V_OUT) and digital thermal shutdown (155°C junction limit), with latched OTP output and recovery via VIN or EN reset. Short-circuit protection combines 20µs current-limit regulation and sub-200ns fast-turnoff circuitry, limiting peak fault current to ~13A.

Key Specifications

Pinout & Package

MP5086GG-Z is housed in a thermally enhanced 2mm×2mm QFN-12 package with exposed thermal pad (pin 13 not electrically connected). The package supports high-power density layouts with minimal board area and efficient heat dissipation via PCB vias to internal ground planes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22975 and NIS5020, MP5086GG-Z uniquely integrates NTC-based thermal threshold setting, latched OTP signaling, and sub-1µA transportation mode - enabling autonomous thermal safety and extended battery shelf life without additional components.

Availability

MP5086GG-Z is available at Aetrix Electronics and suitable for smartphone camera modules, USB-C PD ports, industrial handheld scanners, and wireless SSD expansion cards requiring stable component supply across high-volume production cycles.

Supply support for MP5086GG-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 analog and power ICs, with expertise in DC/DC conversion, load switching, and motor control solutions.

The MP5086 belongs to MPS's precision load switch product line, designed specifically for portable and battery-powered systems needing integrated current sensing, thermal protection, and ultra-low-quiescent-power sleep modes.

FAQ

What is the maximum continuous load current supported by MP5086GG-Z?

The MP5086GG-Z supports up to 7A continuous load current at 5.5V input with proper PCB thermal design (≥4 thermal vias to inner ground plane). At 3.3V input, derating applies due to higher R_DS(ON) (11mΩ), limiting practical continuous current to ~5.5A under 65°C ambient conditions.

How does the IMON pin generate its output voltage?

The IMON pin outputs a voltage proportional to load current, calculated as V_IMON = I_LOAD × R_IMON × (1/82000), where R_IMON is the external resistor to ground. For example, with R_IMON = 50kΩ, 3.75A load yields ~45.7µA × 50kΩ = 2.285V - enabling direct ADC measurement without amplification.

Can MP5086GG-Z be used without connecting the NTC pin?

Yes - leaving NTC open disables NTC-based thermal protection, but thermal shutdown (155°C) remains active. The device operates in normal or bypass mode depending on EN state, and OTP will still assert during junction overtemperature. However, system-level thermal margin must be verified independently.

What happens during a short-circuit event?

Upon short-circuit detection (>13A peak), the MP5086GG-Z disables the main FET within 200ns, holds it off for 80µs, then retries at 2/3 of the programmed current limit. If fault persists, repeated retries lead to thermal shutdown at 155°C, latching OTP high until VIN or EN is cycled.

Is the BP pin required for normal operation?

No - the BP pin is optional and only active in bypass mode (EN=low). When unused, it should be left floating or tied to V_OUT via a 100Ω–1kΩ resistor to limit leakage current from the internal 800kΩ sense resistor. In normal mode, BP has no functional role.

Does MP5086GG-Z support reverse current blocking?

No - the MP5086GG-Z lacks reverse current blocking capability. Its main NFET body diode conducts from VOUT to VIN if VOUT exceeds VIN, making it unsuitable for OR-ing or backfeed prevention applications without external diode or MOSFET.

How is the transportation mode activated and exited?

Transportation mode activates automatically when EN < 0.4V AND OTP voltage < 0.84V (refresh threshold), reducing quiescent current to <1µA. Exit requires either cycling VIN (power cycle) or pulling EN above 1.2V while OTP is pulled high externally - no software reset is possible.