Monolithic Power Systems Inc. MP62180DH-LF-Z

Overview

MP62180DH-LF-Z 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 75mΩ internal MOSFET. It operates from 2.7V to 5.5V input and integrates thermal shutdown, under-voltage lockout, reverse current blocking, and open-drain FLAG output for fault reporting - deployed in USB power distribution and portable electronics where load protection and clean power sequencing are critical.

For engineers reviewing the MP62180DH-LF-Z datasheet, MP62180DH-LF-Z pinout, MP62180DH-LF-Z application, or MP62180DH-LF-Z equivalent, key selection criteria include its MSOP8E package thermal resistance (θJA = 55°C/W), 8ms FLAG deglitch time, 90μA quiescent current, and active-low EN logic - all essential for low-power, space-constrained hot-swap and USB VBUS control designs.

Technical Context

The MP62180DH-LF-Z implements a current-limiting architecture that transitions into constant-current mode upon exceeding 2.8A (typ), with trip current rising to 4A under fast-ramp short-circuit conditions. Its internal charge pump enables full enhancement of the N-channel MOSFET across the 2.7–5.5V input range, maintaining low R_DS(on) stability over temperature.

Thermal protection activates at 140°C junction temperature with 20°C hysteresis, forcing automatic shutdown until die cools to ~120°C. The FLAG pin reports over-current or UVLO faults via open-drain output with built-in 8ms deglitching - eliminating external RC filtering while preserving responsiveness to sustained overload events.

Key Specifications

Pinout & Package

MP62180DH-LF-Z uses the MSOP8E (3mm × 3mm, 0.65mm pitch) package with exposed thermal pad soldered to PCB ground plane for enhanced heat dissipation (θJA = 55°C/W, θJC = 12°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22965DSGR and NCP45520IMNTWG, MP62180DH-LF-Z offers unique integration of reverse current blocking, 8ms hardware-deglitched FLAG, and active-low EN - making it optimal for compact, cost-sensitive USB 2.0/3.0 host ports requiring minimal external components and guaranteed fault immunity.

Availability

MP62180DH-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral control, and notebook PC docking port applications requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP62180DH-LF-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 design centers across Asia and North America and global manufacturing partnerships.

The MP62180/MP62181 product line targets compact, low-power power distribution in portable and embedded systems - delivering integrated protection, minimal footprint, and simplified layout for USB, mobile, and consumer electronics.

FAQ

What is the function of the FLAG pin, and how does its deglitching work?

The FLAG pin is an open-drain output that asserts low after an 8ms deglitch timeout upon over-current or under-voltage lockout. This internal timer filters brief transients while ensuring reliable fault detection for sustained overload conditions. No external RC network is required, and FLAG remains un-deglitched during thermal shutdown or UVLO entry to report immediate faults.

Does MP62180DH-LF-Z support reverse current blocking when disabled?

Yes - the device blocks reverse current flow from OUT to IN when disabled (EN high), measured at ≤0.2μA leakage with OUT=5.5V and IN=GND. This eliminates the need for an external Schottky diode in applications where back-powering must be prevented, such as multi-rail battery systems or hot-swap modules.

How does thermal shutdown behave during continuous overload?

During continuous overload, the device first enters constant-current mode at ~2.8A. If power dissipation exceeds the package's thermal limit, junction temperature rises until reaching 140°C, triggering shutdown. After cooling to ~120°C (20°C hysteresis), it automatically recovers - enabling self-resetting protection without host firmware intervention.

What is the recommended input capacitance, and why is it critical?

A minimum 10μF ceramic capacitor between IN and GND is recommended. This stabilizes the input rail against supply transients and improves immunity to short-circuit-induced ringing. Without it, fast load dumps can cause input voltage sag or oscillation, potentially triggering false UVLO or compromising current-limit accuracy during fault events.

Can MP62180DH-LF-Z be used with 3.3V-only systems?

Yes - the device operates across 2.7V to 5.5V, making it fully compatible with 3.3V systems. At 3.3V input, R_DS(on) remains within spec (≤120mΩ), current limit holds at 2.8A (typ), and EN logic thresholds (0.8V low / 2V high) ensure robust interfacing with standard 3.3V GPIOs without level shifting.

Is the MSOP8E package lead-free and RoHS-compliant?

Yes - the "-LF" suffix in MP62180DH-LF-Z explicitly denotes lead-free, halogen-free, and RoHS-compliant construction per MPS quality assurance standards. The exposed thermal pad is designed for solder reflow to PCB ground, and all plating meets JEDEC J-STD-609 Class 2a requirements.