Monolithic Power Systems Inc. MP62341DH-LF-P

Overview

MP62341DH-LF-P 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 2.7V–5.5V input range. It integrates thermal shutdown, under-voltage lockout, reverse current blocking, and open-drain FLAG outputs for over-current detection. Used in USB power distribution and PC Card hot-swap circuits where fault-tolerant load switching is required.

For engineers reviewing the MP62341DH-LF-P datasheet, MP62341DH-LF-P pinout, MP62341DH-LF-P application, or MP62341DH-LF-P equivalent, key selection criteria include guaranteed 1.1–2.2A current limit accuracy, 8ms FLAG deglitch timing, MSOP8E package thermal resistance (θ_JA = 55°C/W), and active-high EN logic compatibility with USB controller interface signals.

Technical Context

The MP62341DH-LF-P implements dual independent current-limiting channels using internal MOSFETs with precision trip-point sensing and charge-pump gate drive. Each channel operates autonomously: over-current triggers constant-current mode first, then thermal shutdown at 140°C with 20°C hysteresis if sustained.

Its UVLO circuit activates at 1.95V (rising) with 250mV hysteresis, and FLAG pins provide open-drain fault reporting with 8ms deglitch filtering-excluding thermal or UVLO events-to prevent false assertions during inrush or transient overload.

Key Specifications

Pinout & Package

MP62341DH-LF-P uses an 8-pin MSOP package with exposed thermal pad (MSOP8E), requiring PCB GND plane connection for optimal thermal performance (θ_JA = 55°C/W). The exposed pad improves power dissipation capability versus SOIC8 (θ_JA = 90°C/W).

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 TPS2051BDR and NCP45520MUTBG, MP62341DH-LF-P uniquely combines dual-channel integration, UL E322138 certification, 8ms FLAG deglitch, and thermal auto-recovery - making it optimal for safety-critical, multi-load USB and hot-swap applications demanding fault resilience and regulatory compliance.

Availability

MP62341DH-LF-P is available at Aetrix Electronics and suitable for USB power distribution, PC Card hot-swap, and notebook PC subsystem power applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP62341DH-LF-P 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 across Asia and North America and global manufacturing partnerships.

The MP6234x series belongs to MPS's power distribution switch product line, engineered specifically for fault-tolerant, space-constrained load switching in portable and communications equipment where reliability, thermal resilience, and regulatory compliance are essential.

FAQ

What is the difference between MP62341DH-LF-P and MP62340DS-LF-P?

The MP62341DH-LF-P features active-high enable logic and comes in an MSOP8E package with exposed thermal pad, while the MP62340DS-LF-P uses active-low enable and is packaged in SOIC8 without an exposed pad. Both share identical electrical specifications, current limits, and protection features, but differ in control polarity and thermal performance due to package construction.

Does MP62341DH-LF-P support reverse current blocking during disable state?

Yes - MP62341DH-LF-P blocks reverse current flow from OUT to IN when disabled, verified by ≤0.2μA leakage at VOUT=5.5V and VIN=GND. This prevents backfeeding between independently powered rails, which is critical in multi-power-domain systems like notebooks with battery and adapter sources.

Can FLAG1 and FLAG2 be wire-OR'd together for single-fault monitoring?

Yes - both FLAG pins are open-drain and rated for 5.5V, allowing direct connection to a common pull-up resistor and microcontroller interrupt pin. However, this loses per-channel fault identification; use individual FLAG lines if diagnostic granularity is required for system-level error logging or recovery.

What is the maximum allowable continuous power dissipation for MP62341DH-LF-P at 25°C ambient?

At TA=+25°C, the MSOP8E package supports up to 2.3W continuous power dissipation, calculated from θJA=55°C/W and TJ(MAX)=150°C. Derate linearly above 25°C: PD(MAX) = (150 – TA)/55. Exceeding this causes thermal shutdown, but the device recovers automatically once junction temperature falls below ~120°C.

Is MP62341DH-LF-P UL certified?

Yes - MP62341DH-LF-P carries UL recognition under file E322138, confirming compliance with UL 60950-1 and UL 62368-1 for end-equipment safety. This certification applies to the device itself and supports its use in commercial and industrial products requiring third-party safety validation.

How does the 8ms FLAG deglitch time affect short-circuit response?

The 8ms deglitch filter delays FLAG assertion until over-current persists beyond that window, preventing false trips from benign inrush currents (e.g., 100μF output cap charging). True hard shorts still trigger within 1–2ms of onset, but the flag output remains clean - enabling reliable microcontroller interrupt handling without software debouncing.

What PCB layout practices maximize thermal performance for MP62341DH-LF-P?

Connect the exposed thermal pad (Pin 1) to a minimum 100mm² internal or bottom-side GND copper pour using ≥4 thermal vias (0.3mm diameter, spaced evenly). Maintain ≥0.2mm clearance between pad edges and adjacent traces. Avoid placing components directly under the IC to preserve airflow and conduction paths.