Monolithic Power Systems Inc. MP62131ES-LF-P

Overview

MP62131ES-LF-P from Monolithic Power Systems is a single-channel, active-high enable, current-limited power distribution switch optimized for USB VBUS and 3.3V/5V load switching. It delivers 500mA continuous current with 90mΩ R_DS(ON), 2.7–5.5V input range, output discharge function, and thermal shutdown protection. Used in smartphone USB ports and portable GPS devices to prevent fault-induced damage.

For engineers reviewing the MP62131ES-LF-P datasheet, MP62131ES-LF-P pinout, MP62131ES-LF-P application, or MP62131ES-LF-P equivalent, key selection criteria include guaranteed 550–650mA current limit accuracy, 8ms FLAG deglitch timing, reverse current blocking, and SOIC8 package compatibility with industrial temperature range (–20°C to +85°C).

Technical Context

The MP62131ES-LF-P integrates a low-R_DS(ON) N-channel MOSFET with precision current-sense amplifier and thermal shutdown circuitry. Its constant-current limiting activates at ≥550mA (typ. 650mA), entering thermal shutdown only if sustained overload raises junction temperature beyond 140°C with 20°C hysteresis.

It features under-voltage lockout (UVLO) with 2.3V threshold and 250mV hysteresis, open-drain FLAG output with 8ms deglitch, and built-in output discharge path (100Ω) activated during disable or UVLO. EN logic is TTL/CMOS-compatible with 2V high-threshold and 0.8V low-threshold.

Key Specifications

Pinout & Package

MP62131ES-LF-P is supplied in an 8-pin SOIC package (5.00mm × 6.20mm, 1.27mm pitch) with standard JEDEC MS-012 footprint. Pin 1 marked with notch or circle; leads are gull-wing, coplanarity ≤ 0.10mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP62131ES-LF-P, MP62055ES-LF-Z offers superior current capacity and efficiency but sacrifices output discharge and adds complexity for single-channel use; TPL7407LDR provides channel count advantage but lacks all protection mechanisms critical for USB or portable power domains.

Availability

MP62131ES-LF-P is available at Aetrix Electronics and suitable for smartphone USB port switching, portable GPS device power management, and set-top box HDMI hot-plug protection requiring stable component supply and legacy design support.

Supply support for MP62131ES-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, headquartered in California and serving global power management markets since 1997.

The MP62130/MP62131 product line targets compact, protected load switching in space-constrained portable electronics-designed specifically for USB, GPS, and consumer audio/video applications demanding integrated fault resilience.

FAQ

What is the logic polarity of the EN pin on MP62131ES-LF-P?

The EN pin on MP62131ES-LF-P is active-high, requiring ≥2V to enable the switch. This differs from the MP62130 variant, which uses active-low EN. The part marking "MP62131" on the SOIC8 body confirms active-high functionality per MPS ordering guide.

Does MP62131ES-LF-P support reverse current blocking during disable?

Yes-MP62131ES-LF-P blocks reverse current flow from OUT to IN when disabled or during UVLO. This is achieved via internal MOSFET architecture and verified in Electrical Characteristics table (Reverse Leakage Current = 0.2µA max at VOUT=5.5V, VIN=GND).

How does the FLAG pin behave during power-up?

The FLAG pin remains high (open-drain inactive) during power-up and does not assert low until valid operation is established-eliminating false fault signals. This behavior is explicitly documented in the DETAILED DESCRIPTION section and confirmed in Typical Performance waveforms.

What is the maximum allowable output capacitance for stable operation?

No absolute maximum is specified, but application guidance recommends a 10µF ceramic or electrolytic capacitor at IN and optional 0.01–0.1µF ceramic at OUT. The device drives up to 100µF loads reliably, as validated in Turn-On/Off Time test conditions (CL=100µF, RL=11Ω).

Is MP62131ES-LF-P RoHS compliant and lead-free?

Yes-the "-LF" suffix in MP62131ES-LF-P denotes lead-free, RoHS-compliant packaging per MPS documentation. The SOIC8 package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 3 requirements.

Can MP62131ES-LF-P be used in automotive applications?

No-it is rated for –20°C to +85°C ambient operation and lacks AEC-Q200 qualification. Its thermal shutdown threshold (140°C) and UVLO hysteresis are optimized for consumer portable equipment, not extended-temperature automotive environments.

What happens if the current limit is exceeded briefly?

Upon exceeding the trip current (≥550mA), MP62131ES-LF-P enters constant-current mode-not immediate shutdown-allowing brief surges (e.g., inrush) without interrupting power. Thermal shutdown occurs only if sustained overload raises junction temperature to 140°C.