Monolithic Power Systems Inc. MP6212DH-LF-P

Overview

MP6212DH-LF-P from Monolithic Power Systems is a single-channel, active-low current-limited power distribution switch with 1A continuous load capability, 90mΩ R_DS(on), and 2.7V–5.5V input range-designed for USB VBUS switching in portable electronics where overcurrent and thermal protection are critical.

For engineers reviewing the MP6212DH-LF-P datasheet, MP6212DH-LF-P pinout, MP6212DH-LF-P application, or MP6212DH-LF-P equivalent, this device delivers precise 1.5A typical short-circuit current limiting, 8ms FLAG deglitching, reverse current blocking, under-voltage lockout (2.65V threshold), and SOIC8E package with exposed pad for thermal management.

Technical Context

The MP6212DH-LF-P integrates a low-R_DS(on) N-channel MOSFET with internal current-sense amplifier, thermal shutdown circuitry (140°C trip, 20°C hysteresis), and UVLO (1.95V–2.65V). Its active-low EN pin enables direct interface with microcontroller GPIOs without level-shifting.

FLAG is an open-drain fault indicator with 8ms deglitch logic to suppress transient overcurrent events; it asserts low only after sustained overload or thermal fault-not during power-up or UVLO. The device operates in constant-current mode up to 1.5A before thermal shutdown engages.

Key Specifications

Pinout & Package

MP6212DH-LF-P is housed in an 8-pin SOIC package with exposed thermal pad (SOIC8E), requiring solder connection of the exposed pad to PCB ground plane for optimal thermal performance (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 NIS5130MN3T1G, MP6212DH-LF-P uniquely combines accurate current limiting, open-drain FLAG with deglitching, UVLO, and reverse current blocking in a single SOIC8E package-enabling robust, self-contained USB port protection without supplemental circuitry.

Availability

MP6212DH-LF-P is available at Aetrix Electronics and suitable for USB power distribution, portable GPS device power sequencing, and notebook PC docking port management requiring stable component supply and RoHS-compliant packaging.

Supply support for MP6212DH-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/MP6212 product line targets compact, thermally constrained portable electronics-delivering integrated protection (current limit, thermal shutdown, UVLO, reverse blocking) in minimal footprint for USB and peripheral power-switching applications.

FAQ

What is the logic polarity of the EN pin on MP6212DH-LF-P?

The EN pin on MP6212DH-LF-P is active-low: the switch turns ON when EN is pulled below 0.8V (logic low), and turns OFF when EN is above 2.0V (logic high). This matches the "DN" suffix designation in the MP6212 family and enables direct interface with microcontroller GPIOs configured as open-drain or push-pull outputs.

Does MP6212DH-LF-P support reverse current blocking when disabled?

Yes-MP6212DH-LF-P provides true reverse current blocking: when disabled (EN high), current cannot flow from OUT to IN, even if OUT is biased higher than IN. This is implemented via internal MOSFET architecture and confirmed in the datasheet's "Reverse Leakage Current" specification (0.2μA max at OUT=5.5V, IN=GND).

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

FLAG asserts low for both sustained overcurrent (after 8ms deglitch timeout) and thermal shutdown-but not for transient inrush or brief overload. It remains un-deglitched during UVLO or thermal events, meaning it responds immediately to thermal fault without delay, unlike overcurrent which requires the full 8ms filter window.

What is the recommended input capacitance for stable operation?

A minimum 10μF ceramic or tantalum capacitor between IN and GND is recommended per the datasheet to suppress input transients and improve immunity to short-circuit events. This capacitance stabilizes the input rail during load switching and reduces ringing that could trigger false UVLO or current-limit responses.

Can MP6212DH-LF-P be used with 3.3V logic control signals?

Yes-MP6212DH-LF-P's EN input is compatible with 3.3V CMOS/TTL logic: its logic low threshold is ≤0.8V and logic high threshold is ≥2.0V, ensuring reliable recognition of standard 3.3V GPIO outputs. No level shifter is required when driven by 3.3V microcontrollers or PMICs.

Is the exposed pad on the SOIC8E package electrically connected?

Yes-the exposed pad is internally connected to GND and must be soldered to a PCB ground plane. This connection is essential for thermal performance (reducing θ_JA from 50°C/W to lower values) and electrical stability; leaving it unconnected degrades both thermal shutdown response and R_DS(on) consistency.

What happens after thermal shutdown occurs?

Upon reaching 140°C junction temperature, MP6212DH-LF-P disables the output and holds it off until junction temperature falls to approximately 120°C (20°C hysteresis), at which point it automatically recovers and resumes normal operation-provided EN remains asserted and input voltage is within UVLO limits.