Monolithic Power Systems Inc. MP6205DH-LF

Overview

MP6205DH-LF from Monolithic Power Systems is a single-channel, current-limited power distribution switch with 500mA continuous load capability, 90mΩ R_DS(ON), and 2.7V–5.5V input range. It provides overcurrent protection via constant-current limiting (trip threshold 1.2–1.6A), thermal shutdown at 140°C, and reverse current blocking-used in USB port power control for smartphones and set-top boxes.

For engineers reviewing the MP6205DH-LF datasheet, MP6205DH-LF pinout, MP6205DH-LF application, or MP6205DH-LF equivalent, key selection criteria include guaranteed 500mA current limit accuracy, 8ms FLAG deglitch time to suppress false fault reporting, under-voltage lockout (1.95–2.65V rising edge), and MSOP8E package thermal resistance (θ_JA = 55°C/W).

Technical Context

The MP6205DH-LF integrates a low-R_DS(ON) N-channel MOSFET with internal current-sense amplifier, UVLO comparator, thermal sensor, and open-drain FLAG output with 8ms deglitch logic. Its enable input is CMOS/TTL-compatible and supports active-high control.

Operation includes three protection states: (1) current-limit mode triggered by load exceeding trip threshold (≥1.2A), (2) thermal shutdown when junction temperature reaches 140°C with 20°C hysteresis, and (3) UVLO disabling output below 1.95V input. Reverse current blocking prevents backflow from OUT to IN.

Key Specifications

Pinout & Package

MP6205DH-LF is packaged in MSOP8E (3mm × 3mm, 0.65mm pitch) with exposed thermal pad soldered to PCB ground plane for θ_JA = 55°C/W performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IPWPR and TPS2051BDBVR, MP6205DH-LF uniquely combines reverse current blocking, 8ms deglitch, and guaranteed 500mA continuous rating in an MSOP8E footprint-making it optimal for space-constrained USB power switches requiring fail-safe isolation.

Availability

MP6205DH-LF is available at Aetrix Electronics and suitable for smartphone USB port control, set-top box peripheral power, and portable GPS power management requiring stable component supply across automotive-grade temperature ranges (–40°C to +85°C).

Supply support for MP6205DH-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 MP6205 belongs to MPS's power distribution switch product line, engineered specifically for reliable, current-limited load switching in portable and USB-powered systems where fault resilience and small-footprint thermal management are critical.

FAQ

What is the exact thermal shutdown temperature and recovery behavior of MP6205DH-LF?

The MP6205DH-LF shuts down at a junction temperature of 140°C and features 20°C hysteresis, meaning it automatically resumes operation once the die cools to approximately 120°C. This behavior is internally monitored and does not require external circuitry or host intervention, enabling self-recovering fault tolerance in intermittent overload scenarios.

Does MP6205DH-LF support reverse current blocking, and how is it implemented?

Yes-MP6205DH-LF blocks reverse current flow from OUT to IN, verified by a maximum reverse leakage of 0.2μA at OUT=5.5V and IN=GND. This is achieved through internal MOSFET architecture and gate drive control, eliminating the need for external blocking diodes in USB OTG or dual-supply systems.

How does the 8ms FLAG deglitch function interact with thermal and UVLO faults?

The 8ms deglitch applies only to overcurrent events detected by the current-sense amplifier. It does not filter thermal shutdown or UVLO assertions-those trigger immediate FLAG assertion without delay to ensure rapid system-level response to critical conditions like overheating or undervoltage.

Can MP6205DH-LF operate reliably at 2.7V input, and what performance shifts occur?

Yes-MP6205DH-LF is fully specified down to 2.7V. At this minimum VIN, R_DS(ON) increases to 130mΩ (vs. 90mΩ at 5V), resulting in higher conduction loss, and turn-on time extends to 1.7ms. However, current limit, UVLO, and thermal thresholds remain unchanged across the full 2.7–5.5V range.

Is the exposed thermal pad on the MSOP8E package electrically connected, and how must it be handled?

Yes-the exposed pad is internally connected to GND and must be soldered to a dedicated PCB ground plane. Per MPS layout guidelines, it requires ≥80% solder coverage and connection to ≥2 cm² of internal/external copper to achieve the specified θ_JA = 55°C/W and prevent thermal throttling under 500mA load.

What is the maximum capacitive load the MP6205DH-LF can safely drive during turn-on?

The device is characterized with CL = 100μF and RL = 11Ω, yielding a 3ms turn-on time. While not explicitly limited, driving >470μF may extend rise time beyond system timing budgets and increase inrush stress. For heavy loads, a series inrush resistor or soft-start capacitor on EN is recommended to manage dV/dt.

How does the MP6205DH-LF respond to a short circuit applied before EN is asserted?

If a short exists on OUT prior to enabling, the MP6205DH-LF detects the fault immediately upon EN assertion and enters constant-current mode at the trip threshold (1.2–1.6A) without attempting full turn-on-preventing surge currents and protecting upstream supplies before output stabilization.