Monolithic Power Systems Inc. MP6205DN-LF

Overview

MP62055 from Monolithic Power Systems is a single-channel, current-limited power distribution switch IC designed for load switching in USB and portable power rails. It delivers 500mA continuous current with 115mΩ R_DS(ON), operates from 2.7V to 5.5V, features thermal shutdown and under-voltage lockout, and is used in USB port power control and battery-powered peripheral switching.

For engineers reviewing the MP62055 datasheet, MP62055 pinout, MP62055 application, or MP62055 equivalent, key selection criteria include guaranteed current limit accuracy, TSOT23-5 footprint compatibility, FLAG signal timing (8ms deglitch), reverse current blocking, and thermal recovery threshold (~120°C).

Technical Context

The MP62055 integrates a low-R_DS(ON) N-channel MOSFET with precision current-limit circuitry and thermal foldback. Its constant-current limiting activates during overloads, transitioning from linear regulation to stable 500mA output before thermal shutdown engages at ~150°C junction temperature.

It includes an active-low ENABLE input, open-drain FLAG output indicating fault conditions, and built-in UVLO that disables the switch below 2.4V. Reverse current blocking prevents backflow when V_OUT > V_IN, critical for multi-rail systems with shared outputs.

Key Specifications

Pinout & Package

MP62055 is housed in a 5-pin TSOT23-5 package with exposed thermal pad (pin 5). The package supports hand-soldering and reflow assembly, with 0.65mm pitch and 2.9mm × 1.6mm footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP62055, MP62071 offers higher current capacity in identical footprint, while MP5035 adds configurability and diagnostics at the cost of extra pin and layout change - making MP62055 optimal for fixed-threshold, space-constrained USB and appliance load switching.

Availability

MP62055 is available at Aetrix Electronics and suitable for USB port protection, smart appliance UI power management, and e-mobility auxiliary rail control requiring stable component supply and long-term industrial availability.

Supply support for MP62055 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 power management ICs, with design centers in the US, China, and Taiwan.

The MP62055 belongs to MPS's USB, Load & Analog Switches product line, engineered specifically for robust, low-footprint power gating in consumer and industrial USB-connected devices.

FAQ

What is the operating temperature range for MP62055?

The MP62055 is specified for operation from –40°C to +125°C ambient temperature. Its thermal shutdown activates at approximately 150°C junction temperature, and automatic recovery occurs once die temperature falls to ~120°C. This range supports deployment in enclosed appliances like ovens and e-scooter controllers without external heatsinking.

Does MP62055 require an external current-sense resistor?

No. The MP62055 integrates precision current-limit circuitry and does not require an external sense resistor. Its 500mA limit is factory-trimmed and guaranteed across voltage and temperature, simplifying layout and reducing BOM cost compared to discrete eFuse implementations.

Can MP62055 be used with 1.8V logic-level enable signals?

Yes. The EN pin has a logic-threshold of 1.2V (typical), with guaranteed recognition of high state down to 1.4V over temperature. This allows direct interfacing with 1.8V GPIOs without level-shifting, supporting modern low-voltage microcontrollers in portable designs.

How does the FLAG pin behave during thermal shutdown?

During thermal shutdown, the FLAG pin is actively pulled low and remains latched low until the junction temperature drops to ~120°C, at which point the device automatically resumes normal operation and FLAG returns high after a brief stabilization delay. No external reset is needed.

Is reverse current blocking active when the device is disabled?

Yes. Reverse current blocking is inherent to the internal MOSFET structure and remains fully functional whether the device is enabled or disabled. This prevents backfeed from downstream loads into the IN rail even when EN = low, protecting upstream regulators and shared power domains.

What is the typical turn-on time for MP62055?

The typical turn-on time (IN to OUT rise) is 25µs with 100nF load capacitance. This fast switching supports dynamic power sequencing in USB-C PD sink applications and responsive UI power control in smart appliances without perceptible delay.

Does MP62055 support hot-plug insertion into live USB ports?

Yes. With its 8ms FLAG deglitch time and inrush current limiting, the MP62055 tolerates hot-plug events without false fault triggering. The internal current limit engages within microseconds of overload, preventing damage during connector mating transients common in USB accessory docking.