Monolithic Power Systems Inc. MP62180DS-LF-P

Overview

MP62180DS-LF-P from Monolithic Power Systems is a single-channel, active-low enable, current-limited power distribution switch with 2A continuous load capability and 2.8A typical current limit. It integrates an 85mΩ internal MOSFET, operates from 2.7V to 5.5V input, and delivers precise over-current protection via constant-current limiting and thermal shutdown at ~140°C. It is used in USB power distribution for notebook PCs and set-top boxes where fault-tolerant hot-swap control is required.

For engineers reviewing the MP62180DS-LF-P datasheet, MP62180DS-LF-P pinout, MP62180DS-LF-P application, or MP62180DS-LF-P equivalent, key selection criteria include its SOIC8 package, active-low EN logic, open-drain FLAG with 8ms deglitch, reverse current blocking, and UVLO threshold of 2.65V (rising edge).

Technical Context

The MP62180DS-LF-P implements a precision current-limiting architecture using internal sense-amplifier feedback to enforce a 2.8A typical trip threshold during overload or short-circuit events. Its constant-current mode sustains output under fault without latch-off unless thermal shutdown activates at 140°C.

It features integrated protection functions including under-voltage lockout (UVLO) with 250mV hysteresis, thermal shutdown with 20°C hysteresis, and reverse current blocking when OUT > IN. The FLAG pin provides open-drain fault reporting only after 8ms deglitch - eliminating false triggers during startup or transient surges.

Key Specifications

Pinout & Package

MP62180DS-LF-P is housed in an industry-standard SOIC8 package (5.00mm × 6.20mm × 1.75mm), featuring gull-wing leads and RoHS-compliant matte tin plating. The exposed pad is absent in SOIC8; thermal dissipation relies on PCB copper area under pins 6–8 (OUT) and pin 1 (GND).

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 NIS5020MN3TXG, MP62180DS-LF-P uniquely combines SOIC8 compatibility, reverse current blocking, 8ms FLAG deglitch, and UVLO - making it optimal for USB and embedded host systems requiring robust, component-minimized fault management.

Availability

MP62180DS-LF-P is available at Aetrix Electronics and suitable for USB power distribution, notebook PC peripheral rails, and telecom network interface cards requiring stable component supply across industrial temperature range (–40°C to +85°C).

Supply support for MP62180DS-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 in the US, China, and Taiwan.

The MP62180/MP62181 product line targets compact, reliable power distribution in portable and embedded systems - emphasizing integrated protection, minimal external components, and compatibility with USB and PCIe hot-swap requirements.

FAQ

What is the logic polarity of the EN pin on MP62180DS-LF-P?

The EN pin on MP62180DS-LF-P is active-low: the switch turns ON when EN is pulled ≤0.8V (logic low), and turns OFF when EN is ≥2V (logic high). This distinguishes it from the MP62181 variant, which uses active-high EN logic.

Does MP62180DS-LF-P support reverse current blocking when disabled?

Yes - MP62180DS-LF-P blocks reverse current flow from OUT to IN when disabled or when IN falls below OUT voltage. This is achieved via internal MOSFET body-diode control and gate drive sequencing, eliminating need for external Schottky diodes in bidirectional power domains.

What is the thermal shutdown recovery behavior?

Upon reaching ~140°C junction temperature, MP62180DS-LF-P shuts off the output. It automatically recovers and re-enables once die temperature drops to approximately 120°C due to built-in 20°C hysteresis - preventing thermal oscillation during sustained overload conditions.

Can FLAG be used without an external pull-up resistor?

No - FLAG is an open-drain output and requires an external pull-up resistor (typically 10kΩ to VIN or system IO voltage) to generate a valid logic-high signal during normal operation. Without pull-up, FLAG remains floating and cannot assert a clean high state for host interrupt detection.

Is MP62180DS-LF-P compatible with 3.3V logic control levels?

Yes - the EN pin recognizes logic-low ≤0.8V and logic-high ≥2.0V, making it fully compatible with standard 3.3V CMOS outputs. No level-shifting is needed when driven directly from microcontrollers or PMIC GPIOs operating at 3.3V.

How does the 8ms FLAG deglitch improve system reliability?

The 8ms deglitch ensures FLAG only asserts after sustained over-current - rejecting brief inrush currents (e.g., from 100μF output caps) that would otherwise trigger false fault interrupts. This eliminates unnecessary host firmware interventions and improves perceived robustness in real-world USB and peripheral applications.