Monolithic Power Systems Inc. MP5087GG-Z

Overview

MP5087GG-Z from Monolithic Power Systems is a 5.5V, 7A low-R_DS(ON) load switch with integrated current monitoring, soft-start control, output discharge, and push-pull power-good indication. It operates across 0.5V–5.5V input voltage, delivers <10mΩ R_DS(ON) at 5V V_CC, and achieves ±3% current monitor accuracy at 3.75A - deployed in notebook power rail sequencing and portable device hot-swap protection.

For engineers reviewing the MP5087GG-Z datasheet, MP5087GG-Z pinout, MP5087GG-Z application, or MP5087GG-Z equivalent, this page provides verified functional identity, QFN-12 (2mm×2mm) package mapping, confirmed 12-pin terminal roles, real-world current-limit programming behavior, thermal shutdown hysteresis (30°C), and short-circuit response time (200ns).

Technical Context

The MP5087GG-Z integrates a single N-channel power MOSFET with gate charge pump, precision current-sense amplifier, and fast-turnoff short-circuit protection circuitry. Its IMON pin outputs a voltage proportional to load current via external resistor scaling (e.g., 10.5kΩ sets ~7A limit), while SS pin controls slew rate using a 9µA internal current source charging an external capacitor.

Power-good signaling uses a push-pull driver with 90µs delay, 150mV trip threshold, and 50mV hysteresis; thermal shutdown activates at 155°C with 30°C recovery hysteresis. Under-voltage lockout on V_CC triggers at 2.6V (rising) with 200mV hysteresis.

Key Specifications

Pinout & Package

MP5087GG-Z is housed in a thermally enhanced QFN-12 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. The package supports high-density layout 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 NIS5132, MP5087GG-Z uniquely combines 7A capacity, ±3% current monitoring, 200ns short-circuit response, UL2367/IEC 62368-1 certification, and integrated soft-start - making it the only drop-in solution for space-constrained, safety-compliant portable power rails requiring telemetry and fast fault isolation.

Availability

MP5087GG-Z is available at Aetrix Electronics and suitable for notebook power sequencing, tablet hot-swap protection, and solid-state drive power management requiring stable component supply, full lifecycle support, and certified safety compliance.

Supply support for MP5087GG-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 over 20 years of expertise in DC/DC conversion, load switching, and motor control solutions.

The MP5087 belongs to MPS's high-density load switch product line, engineered specifically for portable computing and battery-powered devices demanding ultra-low R_DS(ON), accurate current telemetry, and rapid fault response in sub-4mm² packages.

FAQ

What is the minimum recommended soft-start capacitor value for MP5087GG-Z?

The datasheet specifies a minimum 4.7nF ceramic capacitor on the SS pin to ensure controlled V_OUT ramping. Using smaller values risks uncontrolled inrush current due to insufficient slew-rate limiting, potentially triggering current-limit regulation or voltage droop on shared input rails.

How does the IMON pin generate its output voltage?

IMON outputs a voltage proportional to load current via an internal current-sense amplifier with fixed gain ratio (S ≈ 82,000). With an external resistor R_IMON to ground, the resulting current sets the current-limit threshold per ILimit = (1/R_IMON) × S - e.g., 10.5kΩ yields ~7.8A limit.

Can MP5087GG-Z operate with V_IN below 1.2V?

Yes, but with reduced current-sense ratio accuracy: S shifts from ~82,000 to ~80,000 below 1.2V, introducing up to ±0.5% additional error in IMON-based current measurement. Operation remains functional down to 0.5V, per absolute minimum rating.

What is the purpose of the dual VIN pins (pins 6 and 11)?

Pins 6 and 11 are electrically tied internally and provide parallel input connections to reduce parasitic inductance and voltage drop during high di/dt events like short-circuit turn-off. They must both be connected to the same input source plane with low-inductance traces.

Does MP5087GG-Z require an external V_CC bypass capacitor?

Yes - a minimum 0.1µF ceramic capacitor must be placed directly between V_CC and GND, as close as possible to the pin. This stabilizes the internal UVLO comparator and gate driver, preventing erratic enable/disable behavior during transient load steps.

How does the output discharge function behave under light load?

When disabled (EN = low), the internal 200Ω pull-down connects to V_OUT only if load current is below ~10mA. At higher loads, the discharge path is overridden by forward-biased body diode conduction - ensuring safe discharge without interfering with active load operation.

What safety certifications apply to MP5087GG-Z?

MP5087GG-Z carries UL2367 certification (File No. 20150402-E322138) and IEC 62368-1 3rd Edition recognition, validating its suitability for end-equipment safety compliance in consumer notebooks, tablets, and portable medical devices.