Monolithic Power Systems Inc. MP6211DN-LF

Overview

MP6211DN-LF 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 and under-voltage lockout. It operates from 2.7V to 5.5V input and delivers precise 1.5A short-circuit trip current for USB port power management in portable electronics.

For engineers reviewing the MP6211DN-LF datasheet, MP6211DN-LF pinout, MP6211DN-LF application, or MP6211DN-LF equivalent, key selection criteria include guaranteed 1A continuous current rating, 8ms FLAG deglitch time to suppress false fault reporting, reverse current blocking, SOIC8E exposed-pad thermal performance, and active-high EN logic compatibility with standard microcontroller GPIOs.

Technical Context

The MP6211DN-LF 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 output with internal 8ms deglitching-immune to power-up glitches-and UVLO with 2.65V rising-edge threshold and 250mV hysteresis. The device blocks reverse current and supports 90μA quiescent supply current in enabled state.

Key Specifications

Pinout & Package

MP6211DN-LF uses an 8-pin SOIC package with exposed thermal pad (SOIC8E), requiring solder connection of the pad to PCB ground plane for optimal thermal dissipation (θ_JA = 50°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22965DRLR and NCP45520MUTBG, MP6211DN-LF provides balanced protection (UVLO, thermal shutdown, reverse blocking) with industry-standard SOIC8E layout and active-high EN-making it optimal for USB-compliant designs requiring robust fault handling without external components.

Availability

MP6211DN-LF is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral control, and notebook docking port applications requiring stable component supply, RoHS compliance, and lead-free/halogen-free packaging.

Supply support for MP6211DN-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 MP6211 series belongs to MPS's protected power distribution switch product line, engineered specifically for reliable, low-footprint USB and portable-system power rail control with integrated fault diagnostics and thermal resilience.

FAQ

What is the maximum allowable input voltage for MP6211DN-LF?

The absolute maximum input voltage is +6.0V, but the recommended operating range is 2.7V to 5.5V. Operation above 5.5V risks permanent damage even for brief transients, and the UVLO circuit disables the switch below 1.95V to prevent unstable behavior.

Does MP6211DN-LF support reverse current flow from OUT to IN?

Yes-it actively blocks reverse current when disabled or during output overvoltage events. This is achieved through internal MOSFET body-diode control and gate drive logic, ensuring no backfeed occurs even with OUT biased above IN.

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

FLAG asserts low after 8ms deglitch timeout for overcurrent events only. During thermal shutdown, FLAG responds immediately without deglitching-providing real-time thermal fault indication distinct from current-related faults.

Can MP6211DN-LF drive a 100μF output capacitor safely?

Yes-the datasheet specifies 3ms turn-on time with 100μF load capacitance and 5.5Ω load resistance. Inrush current is internally limited, and the device tolerates this C_OUT value without latch-up or reliability degradation.

Is the exposed pad on the SOIC8E package electrically connected?

Yes-the exposed pad is internally tied to GND and must be soldered to a PCB ground plane. It serves as both the primary thermal path and electrical reference; floating or unconnected pads cause thermal runaway and premature failure.

What is the minimum EN pulse width required for reliable enable/disable?

The EN input has no specified minimum pulse width, but functional testing confirms reliable operation with ≥100ns pulses. Internal input filtering ensures noise immunity, and the pin meets standard CMOS/TTL thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.0V) across temperature.

Does MP6211DN-LF require an input bypass capacitor?

Yes-a minimum 10μF ceramic or tantalum capacitor between IN and GND is required per the datasheet. This stabilizes input voltage during load transients and suppresses ringing that could trigger false UVLO or current-limit responses.