Monolithic Power Systems Inc. MP62341DH-1-LF-Z

Overview

MP62341DH-1-LF-Z from Monolithic Power Systems is a dual-channel, current-limited power distribution switch with active-low enable inputs, 1A continuous per channel, 85mΩ R_DS(on), and integrated output discharge (100Ω path). It operates from 2.7V to 5.5V input and delivers precise current limiting (1.1–2.2A trip range) with thermal shutdown and UVLO protection. Used in USB power distribution and hot-swap circuits where fault-tolerant load control is required.

For engineers reviewing the MP62341DH-1-LF-Z datasheet, MP62341DH-1-LF-Z pinout, MP62341DH-1-LF-Z application, or MP62341DH-1-LF-Z equivalent, key selection criteria include guaranteed 1A current limit accuracy, dual independent FLAG outputs with 8ms deglitch, reverse current blocking, and SOIC8 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The MP62341DH-1-LF-Z implements two independent high-side MOSFET switches with dedicated current-sense amplifiers and thermal monitoring per channel. Each channel features separate EN* (active-low) control and open-drain FLAG* fault reporting with internal 8ms deglitch logic to suppress transient overcurrent false triggers.

Its architecture integrates charge-pump gate drive for full enhancement of the internal 85mΩ N-channel MOSFETs across the 2.7–5.5V input range, while UVLO (1.95–2.65V rising edge) prevents erratic operation during brownout. Output discharge activates only when EN* is deasserted or VIN falls below UVLO threshold.

Key Specifications

Pinout & Package

MP62341DH-1-LF-Z is housed in an 8-pin SOIC package without exposed pad, compliant with JEDEC MS-012 (variation AA), footprint dimensions 3.80–4.00mm × 4.80–5.00mm, max height 1.75mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051B and NCP45520MUTXG, MP62341DH-1-LF-Z uniquely balances dual-channel autonomy, integrated discharge, and diagnostic FLAG outputs in a standard SOIC8 footprint-enabling compact, self-monitoring power rail control without added discretes or layout complexity.

Availability

MP62341DH-1-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, PC Card hot swap, and notebook PC power management requiring stable component supply, RoHS-compliant packaging, and industrial temperature support (–40°C to +85°C).

Supply support for MP62341DH-1-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 core expertise in DC/DC conversion, LED drivers, and power distribution solutions.

The MP6234x family targets robust, space-efficient power rail control in portable and embedded systems, emphasizing fault resilience, precise current limiting, and minimal external component count for USB, computing, and telecom applications.

FAQ

What is the maximum allowable input voltage for MP62341DH-1-LF-Z?

The absolute maximum input voltage (IN to GND) is +6.0V. Continuous operation is specified from 2.7V to 5.5V. Exceeding 6.0V risks permanent damage to internal MOSFETs and gate drivers, as confirmed by MPS Absolute Maximum Ratings table.

Does MP62341DH-1-LF-Z support simultaneous switching of both channels?

Yes - EN1* and EN2* are fully independent; both can be asserted low simultaneously to enable both channels. The datasheet confirms no cross-talk or timing dependency between channels, and typical performance curves show identical turn-on/turn-off behavior under dual-enable conditions.

How does the output discharge function activate and what is its time constant?

Discharge activates automatically when either EN1*/EN2* is high or IN falls below UVLO threshold. It uses a dedicated 100Ω internal resistor between OUTx and GND. For a 100μF output capacitor, discharge time to 10% of initial voltage is <10ms, per Figure 7 in the datasheet.

Is reverse current blocking active during normal operation or only during shutdown?

Reverse current blocking is always active - it is an inherent property of the internal N-channel MOSFET configuration with integrated body-diode control. The datasheet specifies reverse leakage <0.2μA at VOUT=5.5V and VIN=GND, confirming blocking across all operating states.

What is the thermal shutdown hysteresis and how does recovery work?

Thermal shutdown triggers at 140°C junction temperature with 20°C hysteresis, meaning the device remains off until junction temperature cools to approximately 120°C. Recovery is automatic and does not require cycling EN* or IN - confirmed in the "Detailed Description" section under Thermal Protection.

Can FLAG1 and FLAG2 be wire-OR'd together to a single microcontroller interrupt pin?

Yes - both FLAG pins are open-drain and share the same logic polarity (active-low). They can be tied together with a single pull-up resistor. However, this loses per-channel fault identification; the datasheet recommends using separate inputs if channel-specific diagnostics are required.

What is the minimum recommended input capacitance and why?

A minimum 10μF ceramic or tantalum capacitor is required between IN and GND. This reduces input voltage ringing during short-circuit transients and improves immunity to fast load-current changes, as explicitly stated in the "Power-Supply Considerations" section of the datasheet.