Monolithic Power Systems Inc. MP6211DH-LF

Overview

MP6211DH-LF from Monolithic Power Systems is a single-channel, active-high, current-limited power distribution switch with 1A continuous load current capability, 90mΩ R_DS(ON), and 2.7V–5.5V input voltage range. It integrates thermal shutdown, under-voltage lockout, reverse current blocking, and an open-drain FLAG output with 8ms deglitching-designed for USB power distribution in portable electronics where fault protection and compact layout are critical.

For engineers reviewing the MP6211DH-LF datasheet, MP6211DH-LF pinout, MP6211DH-LF application, or MP6211DH-LF equivalent, key selection criteria include guaranteed 1.5A short-circuit trip current, MSOP8E exposed-pad thermal performance (θ_JA = 55°C/W), active-high enable logic compatibility with 2V high/0.8V low thresholds, and precise current-limit accuracy across –40°C to +85°C.

Technical Context

The MP6211DH-LF implements a thermally protected N-channel MOSFET power switch with internal current-sense amplifier and charge-pump gate driver. Its constant-current limiting activates at ≥1.7A (typical trip) and sustains up to 1.5A (typical short-circuit current) before thermal shutdown triggers at 140°C.

FLAG reporting uses an 8ms deglitch filter on overcurrent events but bypasses filtering during UVLO or thermal fault conditions. The device supports reverse current blocking and features 90μA quiescent current in enabled state, with no FLAG glitch during power-up due to synchronized startup sequencing.

Key Specifications

Pinout & Package

The MP6211DH-LF is housed in an 8-pin MSOP package with exposed thermal pad (MSOP8E), requiring solder connection of the pad to a dedicated GND plane for optimal θ_JA = 55°C/W thermal performance.

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 NIS5132MN, the MP6211DH-LF uniquely combines MSOP8E thermal efficiency, 8ms deglitched FLAG reporting, and self-resetting thermal protection-making it optimal for space-constrained, fault-aware USB and portable power applications.

Availability

MP6211DH-LF is available at Aetrix Electronics and suitable for USB power distribution, smartphone peripheral switching, and notebook PC docking interfaces requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP6211DH-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 power distribution switch product line, engineered specifically for fault-tolerant, space-efficient load control in portable and USB-powered systems.

FAQ

What is the maximum allowable continuous current for MP6211DH-LF at 85°C ambient?

The MP6211DH-LF delivers 1.0A continuous current at TA = +85°C when mounted on a standard 4-layer PCB with the exposed pad fully soldered to a 1-in² GND copper area. Derating is not required within this condition per datasheet thermal characterization.

Does MP6211DH-LF require an external pull-up resistor on the FLAG pin?

Yes-FLAG is an open-drain output and requires an external pull-up resistor (typically 10kΩ to VIN) to generate a valid logic-high signal during normal operation. No pull-up is needed if only active-low fault detection is used.

Can MP6211DH-LF be used with 3.3V logic-level microcontrollers?

Yes-the EN pin accepts TTL/CMOS-compatible thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V), making it directly drivable by 3.3V GPIOs without level-shifting. The 90μA quiescent current also minimizes MCU I/O loading.

How does the 8ms FLAG deglitch time affect response to short-circuit events?

The 8ms deglitch window filters out sub-8ms current spikes (e.g., capacitor inrush), ensuring FLAG only asserts for sustained overloads. Short circuits lasting ≥8ms trigger immediate FLAG assertion, while shorter events are ignored to prevent false interrupts.

Is reverse current blocking active when the device is disabled?

Yes-reverse current blocking operates regardless of EN state. When IN = 0V and OUT is biased (e.g., by a charged capacitor), the internal MOSFET body diode is reverse-biased, preventing current flow from OUT to IN even in shutdown mode.

What is the recommended minimum input capacitance for stable operation?

A minimum 10μF ceramic or tantalum capacitor between IN and GND is recommended per datasheet. This reduces input voltage ripple and improves immunity to short-circuit transients, especially in USB VBUS applications with shared upstream sources.