Monolithic Power Systems Inc. MP62170ES-1-LF

Overview

MP62170ES-1-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, open-drain FLAG output with 8ms deglitch, thermal shutdown at 140°C, and reverse current blocking - deployed in USB power distribution and PC Card hot-swap circuits.

For engineers reviewing the MP62170ES-1-LF datasheet, MP62170ES-1-LF pinout, MP62170ES-1-LF application, or MP62170ES-1-LF equivalent, key selection criteria include guaranteed 1.5A current limit accuracy, SOIC8 package thermal performance (θ_JA = 90°C/W), UVLO threshold (1.95V), and FLAG response timing under short-circuit transients.

Technical Context

The MP62170ES-1-LF integrates a low-R_DS(ON) N-channel MOSFET with precision current-sense amplifier and charge-pump gate driver to enforce constant-current limiting during overloads. Its UVLO circuit disables operation below 1.95V to prevent erratic switching, while thermal sensing triggers shutdown at 140°C with 20°C hysteresis.

FLAG is an open-drain fault indicator activated only after 8ms deglitched overcurrent detection - eliminating false triggers from transient surges. The device supports reverse current blocking when V_OUT > V_IN, and EN logic is TTL/CMOS-compatible with 0.8V low / 2V high thresholds.

Key Specifications

Pinout & Package

MP62170ES-1-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 TPS2051BDBVR and NCP45520MUTBG, MP62170ES-1-LF uniquely balances SOIC8 manufacturability, integrated 8ms deglitched FLAG, and precise 2.3A current limit - making it optimal for USB and hot-swap applications requiring both protection and diagnostics without added components.

Availability

MP62170ES-1-LF is available at Aetrix Electronics and suitable for USB power distribution, PC Card hot swap, and notebook PC auxiliary rail applications requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.

Supply support for MP62170ES-1-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 mixed-signal ICs for power management, motion control, and automotive applications.

The MP62170 series belongs to MPS's power distribution switch product line, designed specifically for robust, current-limited load switching in portable and embedded systems with stringent reliability and footprint requirements.

FAQ

What is the function of the FLAG pin on MP62170ES-1-LF?

The FLAG pin is an open-drain output that asserts low after an 8ms deglitched overcurrent or thermal shutdown event. It remains inactive during power-up transients and UVLO conditions, providing reliable fault indication without external filtering components. Its 1µA leakage ensures minimal loading on pull-up networks.

Does MP62170ES-1-LF support reverse current blocking?

Yes - the device blocks reverse current flow from OUT to IN when V_OUT exceeds V_IN by more than 0.2V, preventing backfeed into upstream supplies during hot-plug or standby conditions. This feature is inherent to its internal MOSFET architecture and requires no external diodes.

What is the maximum allowable continuous power dissipation for MP62170ES-1-LF in SOIC8?

At TA = +25°C, the SOIC8 package supports 1.4W continuous power dissipation. Derating follows θ_JA = 90°C/W: PD_MAX = (150°C – TA)/90°C/W. At +85°C ambient, maximum dissipation drops to 0.72W - sufficient for 1.5A loads at ≤5.5V with <113mV dropout.

How does the MP62170ES-1-LF respond to a short circuit at the output?

Upon short detection, it immediately enters constant-current mode at ~2.3A. If the condition persists, junction temperature rises until thermal shutdown activates at 140°C. The device auto-recovers once die temperature falls to ~120°C, provided EN remains asserted and input voltage is valid.

Is MP62170ES-1-LF pin-compatible with MP62171ES-1-LF?

No - MP62170ES-1-LF has active-low EN (pin 4), while MP62171ES-1-LF uses active-high EN. Both share identical pinout, package, and electrical specs except for EN polarity. Direct replacement requires logic inversion in the enable path to maintain functional behavior.

What input capacitance is recommended for stable operation?

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