Monolithic Power Systems Inc. MP62180DD-LF-P

Overview

MP62180DD-LF-P from Monolithic Power Systems is a single-channel, active-low enable current-limited power distribution switch with 2A continuous load capability, 2.8A typical current limit, and integrated thermal shutdown and under-voltage lockout. It uses an internal 75mΩ MOSFET, operates from 2.7V to 5.5V input, and delivers precise overcurrent protection for USB VBUS power control in portable electronics.

For engineers reviewing the MP62180DD-LF-P datasheet, MP62180DD-LF-P pinout, MP62180DD-LF-P application, or MP62180DD-LF-P equivalent, key selection criteria include its 8ms FLAG deglitch time, reverse current blocking, active-low EN logic, QFN8E (2mm × 3mm) package with exposed thermal pad, and guaranteed operation from –40°C to +85°C.

Technical Context

The MP62180DD-LF-P implements a precision current-limiting architecture using internal sense-amplifier feedback to enforce a 2.8A typical trip threshold with ±0.7A tolerance across temperature. Its constant-current mode activates within microseconds of overload onset, limiting energy dissipation during short-circuit events.

Thermal protection triggers at 140°C junction temperature with 20°C hysteresis, and UVLO disables operation below 1.95V rising-edge threshold. The open-drain FLAG pin asserts low after 8ms deglitch delay only for sustained overcurrent-not during power-up or transient spikes-ensuring robust fault reporting without external filtering.

Key Specifications

Pinout & Package

MP62180DD-LF-P is housed in a thermally enhanced QFN8E package (2mm × 3mm, 0.75mm height) with an exposed thermal pad on the underside that must be soldered to a PCB ground plane for optimal thermal performance and current handling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-limited power distribution switch applications.

Compared with TUSB2036IPWR and TPS22965DSGR, MP62180DD-LF-P uniquely combines autonomous thermal shutdown, open-drain fault flag with deglitch, and reverse current blocking-making it suitable for safety-critical, unmonitored power rails where host intervention is unavailable or undesirable.

Availability

MP62180DD-LF-P is available at Aetrix Electronics and suitable for smartphone USB power control, notebook PC ExpressCard slot management, and set-top box HDMI port protection requiring stable component supply and long-term industrial availability.

Supply support for MP62180DD-LF-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 power ICs, with design centers across Asia and North America and global manufacturing partnerships.

The MP62180 series belongs to MPS's load switch product line, engineered specifically for reliable, self-protecting power distribution in space-constrained portable and embedded systems operating from 2.7V to 5.5V rails.

FAQ

What is the function of the FLAG pin on MP62180DD-LF-P?

The FLAG pin is an open-drain output that asserts low after an 8ms deglitch timeout during sustained overcurrent or thermal shutdown events. It remains inactive during power-up transients and UVLO conditions, eliminating false fault reporting without external RC filters.

Can MP62180DD-LF-P be used with a 3.3V input supply?

Yes-MP62180DD-LF-P supports input voltages from 2.7V to 5.5V, making it fully compatible with 3.3V rails. At 3.3V, its R_DS(on) remains ≤120mΩ across temperature, ensuring ≤264mV dropout at 2.2A load.

How does the thermal shutdown mechanism recover?

When junction temperature reaches 140°C, the device shuts off. Recovery occurs automatically once die temperature falls to approximately 120°C due to built-in 20°C hysteresis-preventing oscillation during marginal thermal conditions.

Is reverse current blocking active when the device is disabled?

Yes-reverse current blocking is inherent to the internal MOSFET structure and functions regardless of EN state. When disabled, OUT-to-IN leakage is limited to 0.2μA, protecting upstream supplies from backfeed.

What is the recommended PCB layout for thermal performance?

Maximize copper area connected to the exposed thermal pad (Pin 1) using ≥4 thermal vias to inner ground planes. Maintain ≥0.5mm clearance around the pad and avoid solder mask coverage to ensure low θ_JA (~55°C/W).

Does MP62180DD-LF-P require external components for basic operation?

Only two external components are mandatory: a ≥10μF capacitor between IN and GND for stability, and a pull-up resistor on FLAG (if interfacing with 3.3V/5V logic). No external current-sense resistors or timing capacitors are needed.

What is the maximum continuous output current at 85°C ambient?

At TA = +85°C with standard 4-layer PCB layout and 250mm² 2oz copper on top/bottom layers, MP62180DD-LF-P sustains 2A continuous current. Derating is not required unless θ_JA exceeds 55°C/W due to poor heatsinking.