Monolithic Power Systems Inc. MP5087GG-P

Overview

MP5087GG-P 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 signaling. It operates across 0.5V–5.5V input voltage range, delivers <10 mΩ R_DS(ON) at 5V V_CC, and provides ±3% current monitor accuracy at 3.75A load-enabling precise inrush management and real-time load diagnostics in portable computing power rails.

For engineers reviewing the MP5087GG-P datasheet, MP5087GG-P pinout, MP5087GG-P application, or MP5087GG-P equivalent, this device supports critical design tasks including hot-swap inrush limiting, programmable current limit setting via IMON resistor, thermal-safe high-current switching, and system-level power sequencing validation using the PG signal.

Technical Context

The MP5087GG-P integrates a low-loss N-channel MOSFET with a precision current-sense amplifier, adjustable slew-rate soft-start (via external SS capacitor), and dual-stage overcurrent protection: primary regulation at user-set threshold (e.g., 7.7A) and secondary fast-off at ~13A with 200ns response. Its control logic includes UVLO on V_CC (2.6V–2.8V), thermal shutdown at 155°C with 30°C hysteresis, and push-pull PG output with 90µs delay and 110–250mV trip window.

Current monitoring uses an internal 82,000× sense ratio (S), delivering 45.73µA typical IMON output at 3.75A load and 3.6V VIN; accuracy degrades below 1.5A due to offset. Output discharge employs a 200Ω internal pull-down, while EN threshold is 1.3–1.7V with 400mV hysteresis-ensuring noise-immune enable/disable in noisy DC/DC environments.

Key Specifications

Pinout & Package

MP5087GG-P 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 (θ_JA = 80°C/W on 4-layer PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22975DQAR and NIS5820MN, MP5087GG-P uniquely combines 7A capacity, ±3% current monitoring, adjustable soft-start, output discharge, and PG signaling in a 2mm×2mm QFN-making it the only option for space-constrained, safety-certified, and telemetry-enabled portable power rails.

Availability

MP5087GG-P is available at Aetrix Electronics and suitable for notebook main power rails, tablet USB-C PD input switching, and solid-state drive (SSD) power enable applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MP5087GG-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 analog and mixed-signal ICs for power management, motion control, and automotive applications.

The MP5087 belongs to MPS's load switch portfolio designed specifically for portable computing and battery-powered systems demanding high efficiency, small footprint, and integrated protection features.

FAQ

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

The datasheet specifies a minimum 4.7nF capacitor on the SS pin to ensure controlled V_OUT ramp. Using smaller values risks uncontrolled inrush current, potentially triggering current limit or causing input voltage droop. For 7A loads, 100nF is recommended to achieve ~20ms soft-start time and avoid regulation instability under heavy capacitive loading.

How does the IMON pin function, and what resistor value sets a 7.7A current limit?

IMON outputs a current proportional to load current (S ≈ 82,000). To set 7.7A limit, use R_IMON = 1 / (7.7A × 82,000) ≈ 1.59kΩ - matching the 1.58kΩ value in Table 1. This resistor connects between IMON and GND; its tolerance directly impacts OCP accuracy, so 1% metal-film is recommended.

Does MP5087GG-P require an input capacitor on VIN, and if so, what value?

No specific VIN capacitor is mandated, but a minimum 0.1µF ceramic capacitor near the VIN pins is advised to suppress high-frequency noise. For hot-plug or high-dI/dt scenarios, add bulk capacitance (e.g., 10–47µF tantalum) to absorb parasitic inductance spikes and prevent exceeding the 6.5V absolute maximum rating during transient events.

What is the purpose of the 200Ω discharge resistor, and when does it activate?

The 200Ω internal pull-down on V_OUT activates only when EN is low and the load is light (<10mA). It discharges residual V_OUT capacitance to GND within milliseconds, preventing unintended wake-up of downstream circuits or latch-up in multi-supply systems during power-down sequences.

Can MP5087GG-P operate with VCC = 3.3V while VIN = 1.2V?

Yes: V_CC must be 3V–5.5V independently of VIN, which can be as low as 0.5V. At VIN = 1.2V, the current sense ratio S drops from 82,000 to ~80,000, causing minor IMON gain shift (<3%). All protection functions-including OCP, thermal shutdown, and PG-remain fully operational with V_CC = 3.3V.

Is the PG pin truly push-pull, and what are its drive capabilities?

Yes: PG is a true push-pull output with 250kΩ pull-up and 200Ω pull-down. It sources up to 100µA at V_CC = 3.3V and sinks ≥10mA at 0.2V. This allows direct interfacing with 1.8V/3.3V GPIOs without level shifters and supports driving small LEDs or optocouplers for system status indication.

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

After 200ns fast-off, the device remains off for 80µs, then re-enables with current limit reduced to 2/3 of the original setting (e.g., 5.1A if preset to 7.7A). If the fault persists, repeated cycles occur until thermal shutdown at 155°C. Once cooled to 125°C, full current limit resumes automatically-no external reset required.