Monolithic Power Systems Inc. MP62170EK-LF-P

Overview

MP62170EK-LF-P from Monolithic Power Systems is a single-channel, active-low enable, current-limited power distribution switch with 1.5A continuous load current capability, 75mΩ R_DS(ON), and 2.7V–5.5V input voltage range. It integrates thermal shutdown, under-voltage lockout, reverse current blocking, and an open-drain FLAG output for over-current detection in USB power distribution and portable device load switching.

For engineers reviewing the MP62170EK-LF-P datasheet, MP62170EK-LF-P pinout, MP62170EK-LF-P application, or MP62170EK-LF-P equivalent, key selection considerations include its active-low EN logic, 8ms deglitched FLAG response, 1.5A guaranteed current limit, and MSOP-8 package with exposed-pad-free thermal design for space-constrained USB and mobile power rails.

Technical Context

The MP62170EK-LF-P implements a precision current-limiting architecture using internal sense-FET feedback to maintain constant output current during overload (trip threshold: 2.3A typ), transitioning to thermal shutdown only if sustained short-circuit heating exceeds 140°C junction temperature. Its UVLO circuit enforces operation only above 1.95V rising-edge threshold with 250mV hysteresis.

Functionally, it operates as a high-side load switch with integrated charge pump driving the N-channel MOSFET gate, enabling full enhancement across the 2.7V–5.5V input range. The open-drain FLAG pin asserts low after 8ms deglitch timeout upon over-current or thermal fault, eliminating external filtering components while rejecting transient noise.

Key Specifications

Pinout & Package

MP62170EK-LF-P is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.0mm height) with no exposed thermal pad, optimized for compact PCB layouts in portable electronics. Pin numbering follows standard MSOP top-view orientation with Pin 1 marked by half-circle indentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL7407LDR and TPS22965DSGR, MP62170EK-LF-P uniquely combines active-low EN, integrated thermal shutdown with hysteresis, and 8ms deglitched FLAG-enabling autonomous, self-protecting operation in USB and portable power rails without host firmware dependency.

Availability

MP62170EK-LF-P is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral switching, notebook ExpressCard slot control, and portable GPS power management requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.

Supply support for MP62170EK-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 core expertise in DC/DC converters, LED drivers, and intelligent power switches.

The MP62170/MP62171 product line was designed specifically for reliable, space-efficient load switching in portable and USB-powered systems-emphasizing autonomous fault protection, low quiescent current, and simplified system-level integration.

FAQ

What is the function of the FLAG pin on MP62170EK-LF-P?

The FLAG pin is an open-drain output that asserts low after an 8ms deglitch timeout when over-current or thermal shutdown is detected. It remains high during normal operation and power-up, providing a clean, noise-immune fault signal to the host microcontroller without requiring external RC filtering.

Does MP62170EK-LF-P support reverse current blocking?

Yes. When disabled (EN high), the internal MOSFET blocks reverse current flow from OUT to IN, preventing back-powering of upstream sources. This eliminates the need for an external Schottky diode in applications where load-side capacitors could otherwise discharge into the input rail.

What is the maximum allowable continuous current at 85°C ambient?

At TA = +85°C in the MSOP-8 package, the maximum continuous current is 1.5A, as specified in the Absolute Maximum Ratings table and validated by thermal resistance (θJA = 150°C/W) and derating curves in the datasheet. Derating is not required within this limit under typical PCB copper area conditions.

How does the under-voltage lockout (UVLO) behave during input ramp-up?

The UVLO circuit holds the switch disabled until the IN voltage rises above 1.95V (min), then enables operation. Once enabled, it remains active down to 1.7V (1.95V – 250mV hysteresis). This prevents chattering during slow input ramps and ensures clean turn-on only when sufficient gate drive voltage is available.

Can MP62170EK-LF-P be used with a 3.3V input supply?

Yes. Its 2.7V–5.5V input range fully supports 3.3V operation. At 3.3V, R_DS(ON) increases slightly (to ~90mΩ typ), resulting in ~135mV conduction drop at 1.5A-well within typical load regulation requirements for portable 3.3V rails.

Is there a recommended input capacitor value for stable operation?

A minimum 10µF ceramic capacitor between IN and GND is recommended per the datasheet to suppress input transients and improve immunity to short-circuit ringing. For heavy output loads, adding ≥100µF bulk capacitance on the OUT side further reduces load-step voltage droop.

What is the difference between MP62170EK and MP62171EK?

MP62170EK features active-low EN logic (EN = low enables), while MP62171EK uses active-high EN (EN = high enables). All other electrical specifications-including current limit, R_DS(ON), FLAG behavior, and thermal protection-are identical. The suffix "-LF-P" denotes RoHS-compliant, lead-free, tape-and-reel packaging.