Monolithic Power Systems Inc. MP62340DS-LF-Z

Overview

MP62340DS-LF-Z from Monolithic Power Systems is a dual-channel, active-low enable, current-limited power distribution switch with 1A continuous per channel, 80mΩ R_DS(ON), and integrated thermal shutdown. It operates from 2.7V to 5.5V input and delivers precise overcurrent protection for USB power rails and hot-swap interfaces in portable computing systems.

For engineers reviewing the MP62340DS-LF-Z datasheet, MP62340DS-LF-Z pinout, MP62340DS-LF-Z application, or MP62340DS-LF-Z equivalent, key selection criteria include guaranteed 1.1–2.2A current limit accuracy, 8ms FLAG deglitch timing, reverse current blocking, and SOIC8 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The MP62340DS-LF-Z integrates two independent N-channel MOSFET power switches with matched current-limit circuitry, UVLO (1.95–2.65V rising edge), and open-drain FLAG outputs with internal 8ms deglitch filtering. Each channel enters constant-current mode at trip current ≥1.6A before thermal shutdown activates at 140°C junction temperature.

Its dual EN inputs are active-low (MP62340 variant), enabling discrete control of each output path; the device supports simultaneous or staggered turn-on with 3ms typical T_ON and 10ms T_OFF, while maintaining <1μA shutdown current and 140μA quiescent supply current under full operation.

Key Specifications

Pinout & Package

MP62340DS-LF-Z uses an 8-pin SOIC package without exposed pad, optimized for surface-mount assembly and thermal dissipation up to 1.4W at +25°C ambient. Pin 1 is marked with notch or dot; GND (Pin 1) connects to PCB ground plane for stable reference and EMI control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL92012DRVR and TPS22965DRLR, MP62340DS-LF-Z uniquely combines dual active-low EN control, matched 1A current limiting, open-drain FLAG outputs with deglitching, and thermal hysteresis-making it optimal for space-constrained, fault-aware USB and embedded peripheral power systems.

Availability

MP62340DS-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, notebook PC subsystems, and telecom line card designs requiring stable component supply, RoHS-compliant packaging, and industrial temperature support (–40°C to +85°C).

Supply support for MP62340DS-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 intelligent power switches.

The MP62340/MP62341 product line was designed specifically for reliable, compact, and self-protected power distribution in portable and embedded systems-emphasizing current accuracy, thermal resilience, and ease of system integration.

FAQ

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

The absolute maximum input voltage is +6.0V, but the recommended operating range is 2.7V to 5.5V. Exceeding 6.0V risks permanent damage per ABS MAX ratings. Operation above 5.5V voids guaranteed performance and may trigger immediate UVLO or latch-up.

Does MP62340DS-LF-Z support independent current limiting per channel?

Yes-each channel has its own current-sense amplifier and trip comparator. Electrical characteristics confirm independent 1.1–2.2A current limit ranges for OUT1 and OUT2, verified across temperature and input voltage in the datasheet's "Current Limit vs. Input Voltage" plot.

How does the FLAG pin behave during thermal shutdown?

The FLAG pin is not deglitched during thermal shutdown-it asserts immediately upon junction temperature reaching 140°C. Unlike overcurrent events, thermal faults bypass the 8ms deglitch timer to ensure fastest possible system-level response to die overheating.

Can MP62340DS-LF-Z be used with 3.3V logic control signals?

Yes-EN1* and EN2* accept TTL/CMOS-compatible thresholds: logic low ≤0.8V and logic high ≥2.0V. At 3.3V system logic, a 3.3V HIGH fully satisfies the 2V minimum, ensuring robust activation without level shifting.

Is reverse current blocking active when the device is disabled?

Yes-reverse current blocking remains functional regardless of EN state. When IN = 0V and OUTx = 5.5V, reverse leakage is specified at 0.2μA max, confirming body-diode blocking is enforced by internal gate control even in shutdown mode.

What is the thermal resistance (θ_JA) for the SOIC8 package?

The SOIC8 package has θ_JA = 90°C/W on a standard 4-layer JEDEC PCB (JESD51-7). This value is used to calculate maximum power dissipation: PD_MAX = (150°C – T_A) / 90°C/W. At +25°C ambient, max continuous dissipation is 1.39W.

Does MP62340DS-LF-Z require external capacitors for stable operation?

Yes-a minimum 10μF ceramic or tantalum capacitor between IN and GND is recommended to suppress input transients and improve short-circuit immunity. For heavy output loads, a bulk electrolytic capacitor (e.g., 100–470μF) on each OUT improves transient response and reduces voltage droop.