Monolithic Power Systems Inc. MP62341DH-LF-Z

Overview

MP62341DH-LF-Z from Monolithic Power Systems is a dual-channel, active-high enable, current-limited power distribution switch with 1A continuous per channel, 80mΩ R_DS(ON), and 2.7V–5.5V input range. It integrates thermal shutdown, under-voltage lockout, reverse current blocking, and open-drain FLAG outputs for over-current detection. Used in USB power distribution and notebook PC peripheral switching where fault-protected load control is required.

For engineers reviewing the MP62341DH-LF-Z datasheet, MP62341DH-LF-Z pinout, MP62341DH-LF-Z application, or MP62341DH-LF-Z equivalent, key selection criteria include guaranteed 1.1–2.2A current limit accuracy, 8ms FLAG deglitch timing, MSOP8E thermal performance (θ_JA = 55°C/W), and active-high EN logic compatibility with USB controller interface signals.

Technical Context

The MP62341DH-LF-Z implements dual independent current-limiting channels using internal MOSFETs with precision trip-point sensing and charge-pump gate drive. Each channel operates autonomously with dedicated EN and FLAG pins, enabling selective load control and fault reporting without cross-talk.

Its protection architecture combines fast-response current limiting (trip threshold 1.6–2.4A at 100A/s slew), thermal shutdown at 140°C with 20°C hysteresis, and UVLO activation at 1.95–2.65V rising edge. The 8ms deglitch on FLAG ensures immunity to transient overloads while preserving real-time fault visibility during sustained shorts.

Key Specifications

Pinout & Package

MP62341DH-LF-Z is housed in an 8-pin MSOP package with exposed thermal pad (MSOP8E), requiring connection to PCB ground plane for optimal thermal dissipation (θ_JA = 55°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDR and NCP45520MUTBG, MP62341DH-LF-Z delivers balanced integration-dual independent channels in compact MSOP8E, precise analog current limiting without MCU dependency, and robust thermal/UVLO protection-all at lower system-level component count and cost for mid-power USB and embedded peripheral applications.

Availability

MP62341DH-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, notebook PC peripheral switching, set-top box power management, and telecom line card protection requiring stable component supply and long-term industrial availability.

Supply support for MP62341DH-LF-Z 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 MP6234x series belongs to MPS's load switch product line, engineered specifically for reliable, low-footprint power sequencing and fault protection in portable and embedded systems with strict thermal and reliability constraints.

FAQ

What is the maximum allowable input voltage for MP62341DH-LF-Z?

The absolute maximum input voltage (IN) is +6.0V, but the recommended operating range is 2.7V to 5.5V. Operation above 5.5V risks permanent damage even if within absolute max ratings, and UVLO will not activate above this range - design must ensure input stays within 2.7–5.5V under all conditions including transients.

Does MP62341DH-LF-Z support simultaneous enable of both channels?

Yes - EN1 and EN2 operate independently and can be asserted simultaneously or staggered. No internal timing dependency exists between channels; each responds to its own enable signal within 3ms typical turn-on time, allowing synchronized or sequenced power-up based on system requirements.

How does the FLAG pin behave during thermal shutdown?

FLAG asserts active-low during thermal shutdown, but unlike over-current events, it is not deglitched - the flag goes low immediately upon junction temperature reaching 140°C. This provides immediate fault indication for thermal events, distinguishing them from transient over-currents filtered by the 8ms deglitch circuit.

Can MP62341DH-LF-Z drive capacitive loads up to 1000μF?

Yes - the device supports heavy capacitive loads; typical turn-on time is 3ms with 100μF, and rise time remains controlled (<1.7ms at 2.7V) due to slew-rate limited gate drive. For 1000μF, ensure IN supply can source inrush current and add soft-start capacitor on EN if sequencing is required.

Is reverse current blocking effective at 0V input?

Yes - reverse leakage is specified at 0.2μA when V_OUT = 5.5V and V_IN = GND. The internal MOSFET structure blocks conduction from OUT to IN across the full operating temperature range, making it suitable for battery backup and hot-swap scenarios where output may be powered before input.

What is the minimum EN logic high voltage for reliable channel activation?

The minimum guaranteed EN logic high voltage is 2.0V (V_IH) at TA = –40°C to +85°C. At 25°C, activation occurs as low as 1.5V, but designs must meet 2.0V to ensure robust operation across full temperature and voltage tolerance - especially critical in noisy industrial or automotive environments.