Monolithic Power Systems Inc. MP6212DN-LF-P

Overview

MP6212DN-LF-P from Monolithic Power Systems is an active-low single-channel 1A current-limited power distribution switch with 90mΩ R_DS(on), 2.7V–5.5V input range, and thermal shutdown protection. It serves as a protected USB VBUS power switch in portable electronics, delivering precise current limiting (1.5A typical short-circuit trip) and reverse-current blocking.

For engineers reviewing the MP6212DN-LF-P datasheet, MP6212DN-LF-P pinout, MP6212DN-LF-P application, or MP6212DN-LF-P equivalent, key selection criteria include enable polarity (active-low), FLAG deglitch timing (8ms), SOIC8E exposed-pad thermal performance, and UVLO threshold (2.65V max).

Technical Context

The MP6212DN-LF-P integrates a low-R_DS(on) N-channel MOSFET with analog current-sense amplifier and thermal shutdown circuitry. Its constant-current limiting activates at ≥1.5A (typical trip), sustaining load faults without latch-off until junction temperature exceeds 140°C.

It features an open-drain FLAG output with 8ms deglitching for overcurrent detection, under-voltage lockout (1.95V to 2.65V hysteresis), and reverse-current blocking - all implemented without external components. The EN pin accepts CMOS/TTL logic and draws only 1μA in shutdown.

Key Specifications

Pinout & Package

The MP6212DN-LF-P is housed in an 8-pin SOIC package with exposed thermal pad (SOIC8E), requiring solder connection of the pad to a GND 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 TPS2051BDBVR and NCP45520MUTBG, the MP6212DN-LF-P uniquely combines active-low enable, integrated 8ms-deglitched FLAG, and SOIC8E thermal performance - making it optimal for USB VBUS applications requiring robust fault visibility and thermal resilience in legacy-compatible footprints.

Availability

MP6212DN-LF-P is available at Aetrix Electronics and suitable for USB power distribution, portable GPS device power management, and set-top box peripheral protection requiring stable component supply and long-term industrial availability.

Supply support for MP6212DN-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, headquartered in Kirkland, WA, with global design and support operations.

The MP6211/MP6212 product line was designed specifically for protected load switching in portable and USB-powered systems - emphasizing accurate current limiting, thermal robustness, and minimal external component count.

FAQ

What is the enable polarity of MP6212DN-LF-P?

The MP6212DN-LF-P features active-low enable (EN). When the EN pin voltage is ≤0.8V, the internal MOSFET turns on; when ≥2V, it disables the output. This matches common microcontroller GPIO configurations where low-active signals simplify level-shifting and reduce external logic.

Does MP6212DN-LF-P support reverse current blocking?

Yes. When disabled, the MP6212DN-LF-P blocks reverse current flow from OUT to IN, with leakage <0.2μA at 5.5V reverse bias. This prevents backfeeding into upstream supplies - essential for USB OTG and multi-source power architectures where load-side voltage may exceed input.

How does the FLAG pin behave during power-up?

The FLAG pin remains high (open-drain, pulled up externally) during VIN ramp-up and does not assert false faults. It only goes low after an 8ms deglitch timeout following confirmed overcurrent, UVLO, or thermal events - eliminating need for external RC filtering in startup-critical systems.

What is the recommended PCB layout for thermal performance?

Connect the exposed pad (Pin 1) directly to a solid GND plane using ≥4 thermal vias (0.3mm diameter) placed within the pad area. Maintain ≥10mm² copper area beneath the SOIC8E footprint. Avoid routing signal traces under the pad to preserve thermal conduction path to inner layers.

Can MP6212DN-LF-P operate from a 3.3V supply?

Yes. With a 2.7V–5.5V input range, the MP6212DN-LF-P fully supports 3.3V operation. At 3.3V, R_DS(on) increases to ~100mΩ (vs. 90mΩ at 5V), resulting in ~66mV dropout at 0.66A - well within USB specification limits for downstream port voltage compliance.

Is MP6212DN-LF-P RoHS and halogen-free compliant?

Yes. The "-LF" suffix denotes lead-free and halogen-free construction per RoHS Directive 2011/65/EU. All MPS products meet JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and are qualified for reflow soldering up to 260°C peak temperature.

What happens during a short-circuit event?

Upon short-circuit detection, the MP6212DN-LF-P enters constant-current mode at ~1.5A. If the fault persists, junction temperature rises until thermal shutdown triggers at 140°C. Output disables, FLAG asserts low, and recovery occurs automatically once die temperature falls to ~120°C - no manual reset required.