Monolithic Power Systems Inc. MP62180DD-LF-Z

Overview

MP62180DD-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 (QFN8E package). It operates from 2.7V–5.5V input, integrates thermal shutdown, UVLO, reverse current blocking, and an open-drain FLAG pin with 8ms deglitch for USB power rail protection in portable electronics.

For engineers reviewing the MP62180DD-LF-Z datasheet, MP62180DD-LF-Z pinout, MP62180DD-LF-Z application, or MP62180DD-LF-Z equivalent, this device serves as a robust, compact solution for fault-protected 3.3V/5V power switching-especially where space-constrained USB VBUS control, hot-swap sequencing, and overcurrent event reporting are required.

Technical Context

The MP62180DD-LF-Z implements a precision current-limiting architecture using internal sense-FET feedback to enforce a 2.8A typical trip threshold under fast-ramping loads (≤100A/s), entering constant-current mode before thermal stress accumulates. Its EN pin is active-low, distinguishing it from the MP62181 variant.

Thermal protection triggers at ~140°C junction temperature with 20°C hysteresis, and recovery occurs near 120°C. The FLAG pin reports overcurrent or thermal faults after 8ms deglitch filtering but remains unfiltered during UVLO or overtemperature events-enabling deterministic fault diagnosis without external RC networks.

Key Specifications

Pinout & Package

MP62180DD-LF-Z uses the QFN8E (2mm × 3mm) thermally enhanced package with exposed pad soldered to PCB ground plane for optimal thermal performance (θ_JA = 55°C/W). Pin 1 is marked by a circular index on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP62180DD-LF-Z, the TPS2051BDBVR offers legacy SOIC compatibility but sacrifices reverse blocking and thermal robustness, while the NCP45520MUTBG delivers superior efficiency and size but requires revalidation of UVLO and fault-reporting timing in USB-compliant systems.

Availability

MP62180DD-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, PC card hot-swap, and smartphone peripheral power applications requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.

Supply support for MP62180DD-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 series belongs to MPS's power distribution switch product line, engineered specifically for fault-resilient, space-efficient 3.3V/5V rail control in portable and interface-sensitive applications like USB, PCMCIA, and embedded peripherals.

FAQ

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

The FLAG pin is an open-drain output that asserts low after an 8ms deglitch period upon detection of overcurrent or thermal shutdown. It remains unfiltered during UVLO or overtemperature events, enabling immediate fault signaling without delay. An external pull-up resistor is required to interface with microcontroller GPIO or interrupt lines.

Does MP62180DD-LF-Z support reverse current blocking?

Yes-MP62180DD-LF-Z provides active reverse current blocking with only 0.2μA leakage when OUT is biased to 5.5V and IN is grounded. This prevents backfeed from downstream loads into shared input rails, critical for multi-rail systems and USB OTG configurations.

How does the thermal shutdown mechanism recover?

Thermal shutdown activates at ~140°C junction temperature and holds the output off until die temperature falls to approximately 120°C, providing 20°C hysteresis. Recovery is automatic and does not require cycling EN; the device resumes normal operation once thermal equilibrium is restored under reduced load or improved airflow.

Can MP62180DD-LF-Z operate from a 3.3V supply?

Yes-MP62180DD-LF-Z supports input voltages from 2.7V to 5.5V, making it fully compatible with 3.3V logic-supply rails. At 3.3V, R_DS(on) remains within specification (75–120mΩ), and all protections-including UVLO, current limiting, and FLAG response-function as specified across temperature.

What is the recommended input capacitance for stable operation?

A minimum 10μF ceramic or tantalum capacitor between IN and GND is recommended to suppress input transients and improve immunity to short-circuit-induced ringing. For heavy loads, adding a bulk electrolytic capacitor (e.g., 100μF) on the OUT side further reduces load-step ripple and stabilizes downstream regulators.

Is the QFN8E package lead-free and RoHS compliant?

Yes-MP62180DD-LF-Z carries the "-LF" suffix indicating lead-free, halogen-free, and RoHS-compliant construction. The QFN8E package meets JEDEC MO-229 VCED-2 standards and features matte tin plating on leads and exposed pad for reliable reflow soldering.

How does the current-limiting behavior differ from traditional polyfuse solutions?

Unlike polyfuses, MP62180DD-LF-Z enters precise constant-current mode at 2.8A typical-limiting peak fault current without irreversible tripping. It sustains this mode indefinitely until fault clears or thermal shutdown intervenes, enabling diagnostic logging and graceful system-level recovery instead of hardware replacement.