Monolithic Power Systems Inc. MP62170EK-LF-Z

Overview

MP62170EK-LF-Z 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 over-current protection with constant-current limiting (typ. 2.3A short-circuit trip), thermal shutdown (140°C), and under-voltage lockout (1.95V rising threshold), deployed in USB power distribution and portable device VBUS control.

For engineers reviewing the MP62170EK-LF-Z datasheet, MP62170EK-LF-Z pinout, MP62170EK-LF-Z application, or MP62170EK-LF-Z equivalent, key selection criteria include active-low EN logic compatibility, open-drain FLAG response timing (8ms deglitch), reverse current blocking, and MSOP-8 thermal performance (θ_JA = 150°C/W).

Technical Context

The MP62170EK-LF-Z implements a thermally protected N-channel MOSFET power switch with integrated current-sense amplifier and charge-pump gate driver. Its constant-current limiting activates at ≥2.5A (ramped load) and sustains until thermal shutdown triggers at 140°C junction temperature, with 20°C hysteresis enabling automatic recovery below ~120°C.

It features an undeglitched open-drain FLAG output that asserts low after 8ms persistent over-current or UVLO condition, and includes reverse current blocking to prevent backflow from OUT to IN when disabled - critical for multi-rail USB and hot-swap systems where load-side capacitance may retain voltage.

Key Specifications

Pinout & Package

MP62170EK-LF-Z is housed in an 8-pin MSOP package (3.0mm × 4.9mm, 0.65mm pitch) with exposed thermal pad omitted per datasheet - thermal management relies on PCB copper area and θ_JA = 150°C/W rating.

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 AP22653W-7, MP62170EK-LF-Z uniquely combines active-low EN, open-drain FLAG with 8ms deglitch, and reverse current blocking in MSOP-8 - making it optimal for USB-compliant, fault-aware portable systems requiring minimal external components.

Availability

MP62170EK-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral switching, and notebook PC port protection requiring stable component supply, RoHS compliance, and tape-and-reel packaging for automated assembly.

Supply support for MP62170EK-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 mixed-signal ICs for power management, motion control, and automotive applications.

The MP62170/MP62171 product line delivers compact, thermally robust power distribution switches optimized for portable electronics with stringent size, efficiency, and fault-diagnosis requirements.

FAQ

What is the maximum allowable input voltage for MP62170EK-LF-Z?

The absolute maximum input voltage (IN to GND) is +6.0V, but the recommended operating range is 2.7V to 5.5V. Operation above 5.5V risks permanent damage, and operation below 2.7V may trigger under-voltage lockout, disabling the output regardless of EN state.

Does MP62170EK-LF-Z support reverse current blocking when disabled?

Yes - it actively blocks reverse current flow from OUT to IN when disabled (EN high), with measured reverse leakage <0.2µA at V_OUT = 5.5V and V_IN = GND. This eliminates need for external Schottky diodes in bidirectional power architectures.

How does the FLAG pin behave during power-up?

The FLAG pin remains high-impedance (not pulled low) during VIN ramp-up and does not assert until after valid operation begins - preventing false fault signals during initial power sequencing. It only responds to over-current, UVLO, or thermal faults after stabilization.

What is the thermal shutdown recovery behavior?

Upon reaching 140°C junction temperature, MP62170EK-LF-Z disables the output and holds OFF until die temperature falls to approximately 120°C due to built-in 20°C hysteresis - enabling autonomous restart without external reset circuitry.

Can MP62170EK-LF-Z drive capacitive loads up to 100µF?

Yes - the datasheet specifies turn-on time of 3ms and turn-off time of 10ms with C_L = 100µF and R_L = 5.5Ω. For larger capacitive loads, ensure input supply can handle inrush current and add ≥10µF bulk capacitance at IN to suppress transients.

Is the MSOP-8 package lead-free and RoHS compliant?

Yes - the "-LF" suffix in MP62170EK-LF-Z denotes lead-free, RoHS-compliant finish. The part meets JEDEC J-STD-020 moisture sensitivity level MSL3 and is qualified for reflow soldering per IPC/JEDEC J-STD-020.