Monolithic Power Systems Inc. MP6211DH-LF-P

Overview

MP6211DH-LF-P from Monolithic Power Systems is a single-channel, active-high enable, current-limited power distribution switch with 1A continuous load capability, 90mΩ R_DS(on), and integrated thermal shutdown/UVLO protection. It operates from 2.7V to 5.5V input and delivers precise 1.5A short-circuit trip current for USB VBUS power switching in portable electronics.

For engineers reviewing the MP6211DH-LF-P datasheet, MP6211DH-LF-P pinout, MP6211DH-LF-P application, or MP6211DH-LF-P equivalent, key selection criteria include guaranteed 1A current limit accuracy, 8ms FLAG deglitch timing, reverse current blocking, SOIC8E exposed-pad thermal performance, and active-high EN logic compatibility with USB host controllers.

Technical Context

The MP6211DH-LF-P integrates a low-R_DS(on) N-channel MOSFET with analog current-sense amplifier and thermal foldback control. Its constant-current limiting activates at ≥1.7A (typical trip), transitioning to thermal shutdown only if sustained overload raises junction temperature beyond 140°C.

It features an open-drain FLAG pin with 8ms deglitching for reliable fault reporting, under-voltage lockout at 1.95V (rising edge), and reverse current blocking that prevents backflow when IN = GND and OUT = 5.5V - critical for isolated USB port power domains.

Key Specifications

Pinout & Package

MP6211DH-LF-P uses an 8-pin SOIC package with exposed thermal pad (SOIC8E), requiring solder connection of the pad to PCB ground plane for θ_JA = 50°C/W thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-limited power switch applications.

Compared with TPS2051BDBVR and NCP45520IMNTWG-H, MP6211DH-LF-P uniquely combines reverse current blocking, 8ms FLAG deglitching, and active-high EN in a thermally optimized SOIC8E package - making it optimal for USB-C and multi-rail portable designs requiring robust fault isolation.

Availability

MP6211DH-LF-P is available at Aetrix Electronics and suitable for USB power distribution, portable device load management, and notebook PC subsystem power requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP6211DH-LF-P 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 MP6211 series belongs to MPS's power distribution switch product line, engineered specifically for USB-compliant, current-limited load switching in space-constrained portable and computing systems.

FAQ

What is the maximum allowable input voltage for MP6211DH-LF-P?

The absolute maximum input voltage is +6.0V, but the recommended operating range is 2.7V to 5.5V. Exceeding 5.5V may trigger internal protection or cause permanent damage, and operation above 6.0V violates absolute maximum ratings per Rev. 1.3 datasheet Section 4.

Does MP6211DH-LF-P support reverse current blocking during disable state?

Yes - when disabled (EN low), the device blocks reverse current flow from OUT to IN, with leakage limited to 0.2μA at OUT = 5.5V and IN = GND, as specified in Electrical Characteristics Table, Note 10.

How does the FLAG pin behave during thermal shutdown versus overcurrent events?

FLAG asserts low after 8ms deglitch timeout for both overcurrent and thermal events. However, deglitching is bypassed during UVLO or thermal shutdown entry - meaning FLAG responds immediately to thermal fault without delay, unlike overcurrent conditions.

Can MP6211DH-LF-P drive a 1000μF output capacitor safely?

Yes - the device supports up to 1000μF output capacitance with controlled inrush. Turn-on time increases to ~10ms at CL = 1000μF (per Figure 5), remaining within safe SOA limits due to built-in slew-rate control and current limiting.

Is the exposed pad electrically connected internally?

Yes - Pin 1 (exposed pad) is internally connected to GND and must be soldered to a PCB ground plane. Thermal resistance drops from 50°C/W (θ_JA) to 10°C/W (θ_JC) only when the pad is properly connected, as confirmed in Package Reference and Absolute Maximum Ratings sections.

What is the minimum EN pulse width required for reliable turn-on?

A minimum 100ns high pulse on EN is sufficient for activation, as the enable circuit has CMOS/TTL-compatible input thresholds (2.0V high, 0.8V low) and no minimum pulse-width specification - verified in Functional Block Diagram and Enable section of datasheet Rev. 1.3.

Does MP6211DH-LF-P require external components for basic operation?

No - only two external capacitors are mandatory: ≥10μF between IN and GND for stability, and optional output capacitance for load transient suppression. No external sense resistor, pull-up, or timing components are needed due to integrated deglitch, UVLO, and current-limit circuitry.