Monolithic Power Systems Inc. MP62341DH-LF

Overview

MP62341DH-LF 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 integrated thermal shutdown and under-voltage lockout. It operates from 2.7V to 5.5V input and delivers precise 1.5A typical short-circuit current limiting for USB power distribution and hot-swap applications in portable computing systems.

For engineers reviewing the MP62341DH-LF datasheet, MP62341DH-LF pinout, MP62341DH-LF application, or MP62341DH-LF equivalent, this device supports dual independent load switching with open-drain FLAG reporting, reverse current blocking, and 8ms deglitch timing - critical for robust USB port protection and PDA power sequencing.

Technical Context

The MP62341DH-LF integrates two independent N-channel MOSFET power switches with matched current-limit circuitry, each featuring internal trip-current sensing (1.6–2.4A), constant-current foldback during overload, and thermal shutdown at 140°C with 20°C hysteresis. Its UVLO activates at 1.95V rising edge and provides 250mV hysteresis to prevent oscillation near threshold.

Each channel includes dedicated EN* (active-high for MP62341) and open-drain FLAG outputs with 8ms deglitch filtering - eliminating external RC networks while ensuring fault reporting only after sustained overcurrent. The device uses charge-pump gate drive to maintain low R_DS(on) across the full 2.7–5.5V input range.

Key Specifications

Pinout & Package

MP62341DH-LF is housed in an 8-pin MSOP package with exposed thermal pad (MSOP8E), requiring connection to PCB ground plane for optimal thermal performance (θ_JA = 55°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL92012RGER and TPS22965DRLR, MP62341DH-LF uniquely integrates dual-channel enable/fault control, UVLO, thermal shutdown, and 8ms deglitch in one MSOP8E package - reducing layout area by 35% and eliminating four external components versus discrete solutions.

Availability

MP62341DH-LF is available at Aetrix Electronics and suitable for USB power distribution, notebook PC peripheral management, and telecom line card power sequencing requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP62341DH-LF 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 MP6234x series belongs to MPS's power distribution switch product line, designed specifically for robust, space-constrained load switching in portable and embedded systems where fault resilience and minimal external components are essential.

FAQ

What is the difference between MP62340DH and MP62341DH?

MP62340DH features active-low enable inputs (EN1*, EN2*), while MP62341DH uses active-high enables. Both share identical current-limit thresholds, R_DS(on), thermal shutdown, and FLAG behavior. Pinout and package are identical; only logic polarity differs - making them direct replacements when enable signal polarity is adjusted in firmware or external logic.

Can MP62341DH-LF drive a 2.2μF ceramic output capacitor without oscillation?

Yes - the device's internal slew-rate control and 80mΩ R_DS(on) ensure stable turn-on with up to 100μF output capacitance. For 2.2μF, V_OUT rise time is 0.5ms (VIN=5.5V), well within USB specification limits; no external damping is required.

Does FLAG assert during thermal shutdown even if current is below trip threshold?

Yes - FLAG asserts low during thermal shutdown regardless of load current magnitude. The thermal sense circuit operates independently of current-sense amplifiers and triggers FLAG after 8ms deglitch when junction temperature exceeds 140°C.

Is reverse current blocking effective when only one channel is enabled?

Yes - reverse current blocking is inherent to the internal N-MOSFET architecture and functions per channel. When OUT1 is disabled (EN1 low), it blocks reverse current from OUT1 to IN, even if OUT2 is active and loaded.

What is the minimum input voltage required to maintain regulation during current limiting?

At 1A load and 80mΩ R_DS(on), the minimum functional input is 2.7V. Under current-limit conditions (1.5A), dropout is ≤120mV, so regulation holds down to 2.58V - above the 2.45V UVLO falling threshold, ensuring uninterrupted fault response.

How does the 8ms FLAG deglitch interact with short-circuit events?

The deglitch timer starts upon detection of overcurrent and resets if current falls below trip threshold before timeout. During a hard short, current remains above 1.6A, so FLAG asserts low after exactly 8ms - providing deterministic fault latency for MCU interrupt handling without false triggers from inrush.

Can the exposed pad of MP62341DH-LF be left floating?

No - the exposed pad is electrically connected to GND and serves as the primary thermal path. Leaving it unconnected degrades θ_JA from 55°C/W to >100°C/W, risking thermal shutdown at ≤0.5A per channel. It must be soldered to a minimum 100mm² copper pour tied to GND.