Monolithic Power Systems Inc. MP62341DS-LF-Z

Overview

MP62341DS-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 integrated thermal shutdown, UVLO, and reverse-current blocking. It operates from 2.7V to 5.5V input and delivers precise 1.5A typical short-circuit trip current for USB power distribution and hot-swap applications in notebook PCs and telecom systems.

For engineers reviewing the MP62341DS-LF-Z datasheet, MP62341DS-LF-Z pinout, MP62341DS-LF-Z application, or MP62341DS-LF-Z equivalent, key selection criteria include guaranteed 1A continuous current rating, 8ms FLAG deglitch timing, active-high EN logic compatibility with USB controllers, and SOIC8 package thermal performance under sustained load.

Technical Context

The MP62341DS-LF-Z integrates two independent N-channel MOSFET power switches with matched current-limit circuitry, each featuring a dedicated open-drain FLAG output with 8ms deglitch filtering to suppress false fault reporting during transient overloads. Its charge-pump gate driver ensures full enhancement across the 2.7–5.5V input range.

Thermal protection activates at 140°C junction temperature with 20°C hysteresis, forcing automatic shutdown until die temperature falls to ~120°C; UVLO engages below 1.95V (rising edge) with 250mV hysteresis to prevent erratic operation during brownout conditions.

Key Specifications

Pinout & Package

MP62341DS-LF-Z is housed in an 8-pin SOIC package without exposed pad, optimized for standard PCB assembly and moderate power dissipation (1.4W at +25°C ambient). Thermal resistance θ_JA is 90°C/W on a 4-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IPWR and TPS2051BDR, MP62341DS-LF-Z uniquely combines dual-channel independence, reverse-current blocking, and UL certification in a single SOIC8 footprint-enabling compact, safety-compliant, and fault-resilient power architecture without protocol overhead or duplication.

Availability

MP62341DS-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, notebook PC power management, and telecom line card protection requiring stable component supply, RoHS compliance, and long-term lifecycle support.

Supply support for MP62341DS-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 power distribution switch product line, engineered specifically for robust, space-constrained load switching in portable and infrastructure equipment where reliability under fault conditions is non-negotiable.

FAQ

What is the maximum allowable input voltage for MP62341DS-LF-Z?

The absolute maximum input voltage is +6.0V, but the recommended operating range is 2.7V to 5.5V. Exceeding 5.5V may trigger internal UVLO release prematurely or accelerate gate oxide stress; operation above 6.0V risks permanent damage per the Absolute Maximum Ratings table.

Does MP62341DS-LF-Z support reverse-current blocking when the IN rail is unpowered?

Yes-it provides active reverse-current blocking with ≤0.2μA leakage when V_OUT = 5.5V and V_IN = GND. This prevents backfeed from powered peripherals into a collapsed main supply, a critical feature for hot-swap and battery-backed systems.

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

The FLAG pin asserts low after 8ms deglitch for overcurrent events only. During thermal shutdown, FLAG is not deglitched and responds immediately-allowing fast detection of thermal faults distinct from current-limit transients.

Can EN1 and EN2 be tied together for synchronous channel control?

Yes-EN1 and EN2 accept identical logic thresholds (2V high / 0.8V low) and may be driven from a common signal. However, doing so forfeits per-channel fault isolation and independent sequencing capability inherent to the dual-enable architecture.

Is the SOIC8 package of MP62341DS-LF-Z lead-free and RoHS compliant?

Yes-the "-LF" suffix confirms lead-free termination and full compliance with the EU RoHS directive. The device uses matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level MSL3, supporting standard reflow profiles.

What is the typical turn-on time when enabling a channel?

Turn-on time (T_on) is 3ms, measured from 50% EN transition to 90% V_OUT rise with C_L = 100μF and R_L = 5.5Ω. This ensures controlled inrush limiting while maintaining responsiveness for system power sequencing.

Does MP62341DS-LF-Z require external components for basic operation?

No external components are required for core switching functionality. A minimum 10μF capacitor between IN and GND is recommended for stability, and external pull-up resistors on FLAG pins are needed for proper open-drain logic interfacing.