Monolithic Power Systems Inc. MP62260DS-1-LF-Z

Overview

MP62260DS-1-LF-Z from Monolithic Power Systems is a single-channel, active-low power distribution switch with 2A continuous current capability, 3A typical current limit, and integrated output discharge function. It operates from 2.7V to 5.5V input, features a 45mΩ internal MOSFET, and delivers precise over-current protection in portable USB and PC-card hot-swap applications.

For engineers reviewing the MP62260DS-1-LF-Z datasheet, MP62260DS-1-LF-Z pinout, MP62260DS-1-LF-Z application, or MP62260DS-1-LF-Z equivalent, key selection criteria include its active-low enable logic, SOIC8 thermal performance (θJA = 90°C/W), 8ms FLAG deglitch timing, reverse current blocking, and guaranteed -40°C to +85°C operating range.

Technical Context

The device implements a constant-current limiting architecture triggered at ≥3.3A trip current under fast-ramp conditions, entering thermal shutdown only if sustained overload exceeds package power dissipation limits (1.4W at TA=25°C). Its open-drain FLAG pin reports over-current faults after an 8ms deglitch window to suppress transient false triggers.

Under-voltage lockout activates below 1.95V (rising edge) with 250mV hysteresis, while output discharge engages via a 100Ω internal path when EN is deasserted or VIN drops below UVLO threshold - ensuring rapid VOUT decay without external components.

Key Specifications

Pinout & Package

MP62260DS-1-LF-Z uses an industry-standard SOIC8 package (5.0mm × 6.2mm, 1.27mm pitch) with exposed pad not electrically connected. Thermal resistance θJA = 90°C/W on 4-layer JEDEC PCB per JESD51-7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDBVR and NCP45520MUTBG, MP62260DS-1-LF-Z uniquely combines active-low enable, integrated output discharge, open-drain FLAG with deglitch, and tight UVLO hysteresis - making it optimal for space-constrained, fault-aware USB and hot-swap applications requiring autonomous recovery.

Availability

MP62260DS-1-LF-Z is available at Aetrix Electronics and suitable for smartphone peripheral power, USB 2.0 host port protection, and notebook ExpressCard slot applications requiring stable component supply across industrial temperature ranges.

Supply support for MP62260DS-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 power ICs, with design centers in the US, China, and Taiwan, serving computing, telecom, automotive, and industrial markets.

MP62260DS-1-LF-Z belongs to MPS's Power Distribution Switch product line, engineered specifically for reliable, compact, and intelligent power gating in portable and hot-pluggable electronic systems.

FAQ

What is the maximum allowable continuous output current for MP62260DS-1-LF-Z?

The MP62260DS-1-LF-Z supports 2A continuous output current at ambient temperatures up to +60°C with standard SOIC8 PCB layout. At +85°C, derating applies per thermal resistance (θJA = 90°C/W); maximum usable current drops to approximately 1.4A to maintain junction temperature below 125°C.

Does MP62260DS-1-LF-Z require an external pull-up resistor on the FLAG pin?

Yes - the FLAG pin is open-drain and requires an external pull-up resistor to a valid logic-high voltage (e.g., 3.3V or 5V). A 10kΩ resistor is recommended to ensure proper voltage levels while minimizing quiescent current draw during fault reporting.

How does the output discharge function operate during disable?

When EN is pulled high (disable state) or VIN falls below UVLO threshold, the internal 100Ω discharge path connects OUT to GND, actively draining external output capacitors. This occurs automatically without software control and completes within ~5ms for a 100µF load charged to 5V.

Can MP62260DS-1-LF-Z be used with 3.3V-only systems?

Yes - its 2.7V–5.5V input range fully supports 3.3V nominal rails. The EN pin logic thresholds (≤0.8V low, ≥2V high) are compatible with 3.3V CMOS outputs, and FLAG's open-drain structure allows pull-up to 3.3V for seamless integration.

What happens during thermal shutdown, and how does recovery work?

At junction temperature ≥140°C, the device shuts off the internal MOSFET. It remains latched off until die temperature cools to ~120°C (20°C hysteresis), then automatically resumes normal operation - enabling self-recovering protection without host reset or manual intervention.

Is reverse current blocking enabled during normal operation?

Yes - the internal MOSFET structure provides inherent reverse current blocking when the switch is enabled. Even if VOUT exceeds VIN (e.g., due to back-driving from a charged capacitor or external source), current flow from OUT to IN is blocked, protecting upstream power sources.

What is the purpose of the 8ms FLAG deglitch time?

The 8ms deglitch window prevents false fault assertions caused by transient inrush currents (e.g., during capacitor charging). Only sustained over-current events exceeding this duration trigger FLAG assertion - eliminating need for external filtering and improving system reliability.