Monolithic Power Systems Inc. MP62170ES-LF

Overview

MP62170ES-LF from Monolithic Power Systems is a single-channel, 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 features active-low enable, thermal shutdown at 140°C, under-voltage lockout (UVLO) at 1.95V, and open-drain FLAG output with 8ms deglitch time - deployed in USB power distribution and portable GPS devices for fault-tolerant load switching.

For engineers reviewing the MP62170ES-LF datasheet, MP62170ES-LF pinout, MP62170ES-LF application, or MP62170ES-LF equivalent, key selection criteria include guaranteed 1.5A current limit accuracy, reverse current blocking, no FLAG glitch during power-up, SOIC8 package thermal performance (θ_JA = 90°C/W), and compatibility with 3.3V/5V VBUS systems requiring robust overcurrent protection without external sensing.

Technical Context

The MP62170ES-LF integrates a low-R_DS(ON) N-channel MOSFET with internal current-sense amplifier and charge-pump gate driver to enforce precise 1.6–2.3A trip current across temperature. Its UVLO circuit disables operation below 1.95V (250mV hysteresis), while thermal shutdown activates at 140°C with 20°C hysteresis to prevent permanent damage during sustained overload.

FLAG is an open-drain output that asserts low after 8ms deglitch timeout upon overcurrent or UVLO fault - eliminating need for external RC filtering. EN logic is TTL/CMOS-compatible with 0.8V low threshold and 2V high threshold; reverse leakage is limited to 0.2µA when V_OUT = 5.5V and V_IN = GND.

Key Specifications

Pinout & Package

MP62170ES-LF is housed in an 8-pin SOIC package (5.0mm × 6.2mm, 1.27mm pitch) with no exposed pad. Thermal resistance θ_JA = 90°C/W on standard 4-layer PCB per JESD51-7.

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 NCP45520MUTBG, MP62170ES-LF provides integrated 8ms deglitch, UVLO, and thermal hysteresis in SOIC8 - simplifying BOM and layout for cost-sensitive 1.5A USB and portable applications where robustness outweighs ultra-low R_DS(ON).

Availability

MP62170ES-LF is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral switching, and portable GPS device power management requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP62170ES-LF 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 MP62170/MP62171 product line delivers integrated current-limited power switches for portable and USB-powered systems - emphasizing fault resilience, minimal external components, and thermal robustness in compact SOIC/MSOP packages.

FAQ

What is the maximum allowable input voltage for MP62170ES-LF?

The absolute maximum IN voltage is +6.0V, but the recommended operating range is 2.7V to 5.5V. Operation above 5.5V risks permanent damage even if within absolute max ratings, and UVLO will not engage above 6.0V - so system design must ensure input stays within spec under all transient conditions.

Does MP62170ES-LF support reverse current blocking during disable?

Yes - with VIN = GND and VOUT = 5.5V, reverse leakage is specified at 0.2µA. This is achieved via internal MOSFET body diode control and gate drive architecture, eliminating need for external blocking diodes in battery-backup or multi-rail isolation applications.

How does the FLAG pin behave during thermal shutdown?

FLAG asserts low during thermal shutdown, but it is not deglitched in this condition - unlike overcurrent events. The pin responds immediately to thermal fault onset, providing fastest possible system-level thermal alert without delay, while overcurrent faults require 8ms confirmation to avoid false triggers.

Can MP62170ES-LF be used with 3.3V logic control signals?

Yes - EN accepts TTL/CMOS logic levels: logic low ≤0.8V and logic high ≥2.0V. A 3.3V GPIO can directly drive EN without level-shifting, and quiescent current remains at 90µA when enabled, making it compatible with modern low-voltage microcontrollers.

What is the typical turn-off time for MP62170ES-LF?

Turn-off time is 10ms (measured from 50% EN signal to 10% VOUT) with CL = 100µF and RL = 5.5Ω. This value scales inversely with output capacitance and load resistance - heavier capacitive loads increase off-time, while lighter loads reduce it, affecting hot-swap timing budgets.

Is there a difference between MP62170ES and MP62170ES-LF?

MP62170ES-LF is the RoHS-compliant, lead-free version of MP62170ES. Both share identical electrical specifications, pinout, and thermal performance. The "-LF" suffix denotes lead-free termination and green packaging - required for compliance in EU, China, and other regulated markets.

Does MP62170ES-LF require input or output capacitors?

Yes - a minimum 10µF ceramic capacitor between IN and GND is recommended to suppress supply transients. For heavy output loads, a high-value electrolytic capacitor (e.g., 100–470µF) on OUT improves transient response and reduces voltage droop during load steps.