Monolithic Power Systems Inc. MP62180DS-LF-Z

Overview

MP62180DS-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 85mΩ internal MOSFET (SOIC8 package). It operates from 2.7V to 5.5V input, integrates thermal shutdown and under-voltage lockout, and delivers fault protection for USB power distribution in portable electronics.

For engineers reviewing the MP62180DS-LF-Z datasheet, MP62180DS-LF-Z pinout, MP62180DS-LF-Z application, or MP62180DS-LF-Z equivalent, this device supports precise overcurrent response with 8ms FLAG deglitching, reverse current blocking, and stable operation across –40°C to +85°C ambient conditions - critical for hot-swap and load-switching designs requiring robust fault management.

Technical Context

The MP62180DS-LF-Z implements a precision current-limit architecture using internal sense-amplifier feedback to enforce 2.8A typical trip threshold during overload, entering constant-current mode before thermal shutdown activates at ~140°C junction temperature. Its EN* pin is active-low, distinguishing it from the MP62181 variant.

It features an open-drain FLAG output with 8ms deglitch timeout to suppress transient false faults, while maintaining immediate reporting during over-temperature or UVLO events. The SOIC8 package provides 90°C/W θJA thermal resistance and supports 1.4W continuous power dissipation at 25°C ambient.

Key Specifications

Pinout & Package

MP62180DS-LF-Z is housed in an 8-pin SOIC package (body size 4.9mm × 3.9mm) with exposed pad thermally connected to GND. The package supports standard reflow profiles and delivers 1.4W power dissipation at 25°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDR and NCP45520MUTBG, MP62180DS-LF-Z uniquely balances 2A capability, reverse current blocking, 8ms programmable FLAG deglitch, and SOIC8 manufacturability - making it optimal for USB-compliant, field-deployed consumer electronics requiring proven reliability and debug-friendly fault signaling.

Availability

MP62180DS-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral control, and set-top box hub management requiring stable component supply across industrial and consumer production cycles.

Supply support for MP62180DS-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 load switch product line, engineered specifically for robust, low-footprint power gating in portable and interface-sensitive applications - emphasizing fault resilience, minimal external components, and seamless USB ecosystem integration.

FAQ

What is the function of the FLAG pin on MP62180DS-LF-Z?

The FLAG pin is an open-drain output that asserts low after an 8ms deglitched overcurrent or thermal event. It remains inactive during power-up transients and does not deglitch during UVLO or over-temperature faults - providing deterministic fault reporting for host microcontrollers without external filtering components.

Does MP62180DS-LF-Z support reverse current blocking, and how is it implemented?

Yes - MP62180DS-LF-Z blocks reverse current flow from OUT to IN when disabled or during input loss. This is achieved through internal MOSFET body-diode orientation and gate control logic, eliminating the need for external Schottky diodes in bidirectional power domains such as USB OTG or battery-backed systems.

What is the maximum continuous power dissipation for MP62180DS-LF-Z in SOIC8 at 25°C ambient?

The SOIC8 package supports 1.4W continuous power dissipation at TA = +25°C, calculated from its 90°C/W θJA and 150°C maximum junction temperature. Derating is required above 25°C ambient per the linear curve defined in the datasheet's thermal resistance table.

How does the EN* pin logic differ between MP62180 and MP62181?

MP62180DS-LF-Z uses active-low enable (EN*): applying ≤0.8V enables the switch; ≥2V disables it. In contrast, MP62181 variants use active-high EN with identical pinout and functionality otherwise - allowing hardware-compatible selection based on system-level control polarity requirements.

Can MP62180DS-LF-Z operate reliably at 2.7V input, and what performance changes occur?

Yes - MP62180DS-LF-Z is fully specified down to 2.7V input. At this minimum, R_DS(ON) increases to 130mΩ (vs. 85mΩ at 5V), turn-on time extends to 1.7ms, and current limit drops slightly to 2.1A min. All protections remain functional, ensuring safe operation across the full 2.7–5.5V range.

Is an input capacitor required, and what value is recommended?

Yes - a minimum 10μF ceramic capacitor between IN and GND is recommended to suppress input transients and improve immunity to short-circuit events. For heavy loads, adding a bulk electrolytic capacitor (e.g., 100μF) on the OUT side further reduces output ripple and stabilizes voltage during step-load transitions.