Monolithic Power Systems Inc. MP62340DH-LF-Z

Overview

MP62340DH-LF-Z from Monolithic Power Systems is a dual-channel, current-limited power distribution switch with active-low enable logic, 80mΩ R_DS(ON), 1A continuous per channel, and integrated thermal shutdown and under-voltage lockout. It operates from 2.7V to 5.5V input and delivers precise current limiting (1.1–2.2A trip range) for USB power distribution and hot-swap applications in portable electronics.

For engineers reviewing the MP62340DH-LF-Z datasheet, MP62340DH-LF-Z pinout, MP62340DH-LF-Z application, or MP62340DH-LF-Z equivalent, key selection criteria include guaranteed 1A continuous load capability, 8ms FLAG deglitch timing, reverse current blocking, dual independent enable/flag signaling, and MSOP8E package thermal performance (θ_JA = 55°C/W).

Technical Context

The MP62340DH-LF-Z integrates two independent N-channel MOSFET power switches with matched current-limit circuitry, each featuring real-time over-current detection via internal current-sense amplifiers and open-drain FLAG outputs with 8ms deglitch filtering. Its UVLO circuit activates at 1.95V (rising edge) with 250mV hysteresis to prevent erratic switching during brownout conditions.

Thermal protection triggers at 140°C junction temperature with 20°C hysteresis, forcing automatic shutdown until die temperature falls to ~120°C. The device uses charge-pump gate drive to maintain low R_DS(ON) across the full 2.7–5.5V input range and supports reverse current blocking when V_OUT > V_IN.

Key Specifications

Pinout & Package

The MP62340DH-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, θ_JC = 12°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDR and NCP45520MUTBG, the MP62340DH-LF-Z uniquely combines dual-channel integration, reverse current blocking, UVLO, and 8ms deglitch in a thermally optimized MSOP8E package-making it optimal for space-constrained, safety-critical USB and hot-swap designs requiring autonomous fault handling.

Availability

MP62340DH-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, PC card hot swap, notebook PC power management, and telecom line card protection requiring stable component supply, RoHS-compliant packaging, and UL-certified safety assurance.

Supply support for MP62340DH-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/MP62341 product line targets compact, reliable power distribution in portable and embedded systems-delivering integrated protection, low quiescent current, and thermal resilience without external components.

FAQ

What is the function of the exposed pad on the MP62340DH-LF-Z MSOP8E package?

The exposed pad is electrically connected to GND and serves as the primary thermal conduction path from the silicon die to the PCB. It must be soldered to a solid copper ground plane with multiple thermal vias to achieve the specified θ_JA = 55°C/W and sustain 1A continuous current without thermal shutdown.

Does MP62340DH-LF-Z support independent current limiting per channel?

Yes-the MP62340DH-LF-Z implements fully independent current-limit circuitry for each channel, with matched trip thresholds (1.1–2.2A) and separate FLAG outputs. This allows one channel to remain operational during a fault on the other, enabling fault containment in multi-rail systems.

Can MP62340DH-LF-Z be used with 3.3V input supply?

Yes-it operates across 2.7V to 5.5V input, including 3.3V. At 3.3V, R_DS(ON) increases to ≤130mΩ (per datasheet), resulting in ≤130mV dropout at 1A, which remains within typical 3.3V system margin requirements for downstream logic.

How does the 8ms FLAG deglitch time improve system reliability?

The 8ms deglitch filters out brief current spikes (e.g., USB plug-in inrush, capacitor charging) that would otherwise trigger false fault interrupts. This eliminates unnecessary firmware interventions and avoids disabling functional loads due to non-sustained overloads.

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

Reverse current blocking is inherent to the internal N-channel MOSFET architecture and functions continuously-whenever V_OUT exceeds V_IN by >100mV, the body diode is reverse-biased and channel is off, preventing backfeed regardless of EN state or fault condition.

What is the maximum allowable continuous power dissipation for MP62340DH-LF-Z at 60°C ambient?

Using θ_JA = 55°C/W and T_J(MAX) = 150°C, maximum continuous power dissipation is (150 − 60)/55 = 1.64W. At 1A and 80mΩ, power loss is 80mW per channel-well within this limit, confirming safe operation without forced airflow.