Monolithic Power Systems Inc. MP62170ES-1-LF-Z

Overview

MP62170ES-1-LF-Z 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-designed for USB power distribution in portable electronics.

For engineers reviewing the MP62170ES-1-LF-Z datasheet, MP62170ES-1-LF-Z pinout, MP62170ES-1-LF-Z application, or MP62170ES-1-LF-Z equivalent, key selection criteria include guaranteed 1.5A current limit accuracy, SOIC8 package thermal performance (θ_JA = 90°C/W), UVLO threshold (1.95–2.65V), and FLAG response timing under short-circuit transients.

Technical Context

The MP62170ES-1-LF-Z implements an integrated N-channel MOSFET with precision current-sense amplifier and charge-pump gate driver to maintain constant-current mode during overloads. Its internal UVLO circuit prevents operation below 1.95V and includes 250mV hysteresis to avoid chatter near threshold.

Thermal protection uses die-temperature sensing with 20°C hysteresis; shutdown occurs at 140°C and recovery initiates at ~120°C. The FLAG pin provides open-drain fault reporting only after 8ms deglitch timeout-ensuring immunity to transient overloads while excluding UVLO and thermal events from deglitching.

Key Specifications

Pinout & Package

MP62170ES-1-LF-Z 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-1-LF-Z uniquely integrates thermal shutdown, reverse current blocking, and UVLO in a single SOIC8 device-reducing BOM count and simplifying layout for space-constrained USB power nodes.

Availability

MP62170ES-1-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral switching, notebook PC docking ports, and portable GPS power management requiring stable component supply across industrial temperature ranges (–20°C to +85°C).

Supply support for MP62170ES-1-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, motor drive, and automotive applications.

The MP62170/MP62171 product line delivers integrated, thermally robust power distribution switches optimized for USB-compliant load switching in portable and embedded systems with stringent size and reliability requirements.

FAQ

What is the exact enable logic polarity for MP62170ES-1-LF-Z?

The MP62170ES-1-LF-Z uses active-low enable: the switch turns ON when EN* is pulled ≤0.8V (logic low) and turns OFF when EN* is ≥2.0V (logic high). This matches the MP62170 variant designation, distinct from the MP62171's active-high EN.

Does MP62170ES-1-LF-Z require an external pull-up on the FLAG pin?

Yes - FLAG is an open-drain output and requires an external pull-up resistor (typically 10kΩ to 5V or V_IN) to generate a valid logic-high signal during normal operation. The internal circuit pulls FLAG low only during deglitched fault conditions.

Can MP62170ES-1-LF-Z safely drive capacitive loads exceeding 100µF?

Yes - the device specifies turn-on time of 3ms with CL=100µF and RL=5.5Ω. Larger capacitive loads increase inrush duration but remain within safe SOIC8 power dissipation limits if steady-state current stays ≤1.5A and ambient temperature remains ≤+85°C.

How does the 8ms FLAG deglitch interact with thermal shutdown events?

The 8ms deglitch applies only to overcurrent detection. Thermal shutdown triggers FLAG immediately without deglitching - ensuring rapid system-level response to die overheating, which may occur independently of current faults.

Is reverse current blocking effective at 2.7V input?

Yes - reverse current blocking is implemented via internal MOSFET body diode control and operates across the full 2.7V–5.5V input range, limiting reverse leakage to ≤0.2µA regardless of VIN, as verified in electrical characteristics tables.

What is the maximum allowable power dissipation in SOIC8 at +70°C ambient?

Using θ_JA = 90°C/W and T_J(MAX) = 150°C, maximum continuous power dissipation at +70°C ambient is (150 – 70)/90 = 0.89W. This corresponds to ~1.09A RMS current at 75mΩ R_DS(ON), confirming 1.5A rating assumes board-level thermal enhancement or lower ambient.