Monolithic Power Systems Inc. MP62340DS-1-LF-Z

Overview

MP62340DS-1-LF-Z from Monolithic Power Systems is a dual-channel, active-low enable, current-limited power distribution switch with 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 overcurrent protection (1.1–2.2A trip range) and thermal shutdown at 140°C for USB power rail switching in portable computing systems.

For engineers reviewing the MP62340DS-1-LF-Z datasheet, MP62340DS-1-LF-Z pinout, MP62340DS-1-LF-Z application, or MP62340DS-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 hot-swap and load-switching BOMs.

Technical Context

The MP62340DS-1-LF-Z integrates two independent high-side MOSFET switches with matched current-limit circuitry, UVLO (2.65V rising threshold), and thermal sensing with 20°C hysteresis. Each channel features dedicated open-drain FLAG pins that assert after 8ms deglitched overcurrent detection - no external RC filtering required.

Its charge-pump gate driver enables full enhancement of the internal 85mΩ MOSFETs across the full 2.7–5.5V input range, while the output discharge function activates automatically upon EN deassertion or UVLO, discharging external capacitors via a 100Ω internal path to prevent floating voltage on downstream circuits.

Key Specifications

Pinout & Package

MP62340DS-1-LF-Z is housed in an 8-pin SOIC package (no exposed pad), measuring 3.90mm × 4.90mm × 1.75mm, JEDEC MS-012 AA compliant, with 1.27mm lead pitch and RoHS-compliant matte tin plating.

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, MP62340DS-1-LF-Z uniquely combines dual independent FLAG outputs, guaranteed 1A current limit accuracy, and integrated 100Ω discharge - delivering higher functional integration, tighter fault management, and smaller BOM count for space-constrained USB and embedded computing designs.

Availability

MP62340DS-1-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, notebook PC subsystem switching, and telecom line card hot-swap applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP62340DS-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP62340 product line targets compact, intelligent power distribution in portable and embedded systems - emphasizing accurate current limiting, thermal resilience, and integrated protection to replace discrete FET + controller solutions.

FAQ

What is the maximum allowable input voltage for MP62340DS-1-LF-Z?

The absolute maximum input voltage is +6.0V, but the recommended operating range is 2.7V to 5.5V. Operation above 5.5V risks permanent damage even for brief transients, and the UVLO circuit disables the device below 1.95V (rising edge), ensuring reliable startup only within spec.

Does MP62340DS-1-LF-Z support reverse current blocking during disable?

Yes - it provides active reverse current blocking with ≤0.2μA leakage when VIN = GND and VOUT = 5.5V. This prevents backfeed from powered downstream loads into a disabled or unpowered upstream rail, critical for multi-source systems like USB OTG or battery-backed peripherals.

How does the output discharge function operate, and what is its resistance value?

The discharge path 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, discharging a 100μF capacitor in under 10ms - eliminating need for external bleed networks and ensuring safe hot-plug timing compliance.

Can FLAG1 and FLAG2 be tied together to a single microcontroller interrupt pin?

No - FLAG1 and FLAG2 are independent open-drain outputs with no internal OR logic. Tying them together causes indeterminate fault attribution. Each must connect to a separate GPIO with individual pull-up; firmware must poll both flags to isolate which channel triggered the event.

What is the thermal shutdown recovery behavior?

Upon reaching 140°C junction temperature, the device shuts off both channels and holds OFF until die temperature drops to ~120°C (20°C hysteresis). Recovery is automatic - no external reset signal is needed - and output re-enables only after EN* is re-asserted post-cooling.

Is MP62340DS-1-LF-Z compatible with 3.3V logic control signals?

Yes - EN1* and EN2* accept TTL/CMOS logic levels: logic low ≤0.8V (guaranteed enable) and logic high ≥2.0V (guaranteed disable). A 3.3V GPIO can directly drive these pins without level shifting, with only 1μA input leakage at either state.

What PCB layout considerations are critical for thermal performance?

Use ≥2cm² copper pour connected to Pin 1 (GND) with ≥4 thermal vias (0.3mm diameter) to inner ground planes. Avoid routing high-current traces over sensitive analog areas (FLAG, EN); keep IN-GND bulk cap within 5mm of Pins 2 and 1 to minimize loop inductance and improve short-circuit immunity.