Monolithic Power Systems Inc. MP62041DQFU-1-LF-Z

Overview

MP62041DQFU-1-LF-Z from Monolithic Power Systems is a high-side load switch IC with active-high enable, 1.7V–5.5V input range, 85mΩ R_DS(on) at 4.5V, 2A continuous current rating, and 115μs soft-start rise time. It integrates a P-channel MOSFET and level-shift logic for independent EN voltage domain control, used in portable power rail switching and battery switchover circuits.

For engineers reviewing the MP62041DQFU-1-LF-Z datasheet, MP62041DQFU-1-LF-Z pinout, MP62041DQFU-1-LF-Z application, or MP62041DQFU-1-LF-Z equivalent, key selection criteria include enable polarity (active-high), thermal performance in UTQFN4 (θ_JA = 173°C/W), inrush current limiting, shutdown current (1μA), and compatibility with 1.6×1.2mm board space constraints.

Technical Context

The MP62041DQFU-1-LF-Z implements a high-side P-channel MOSFET switch with integrated gate driver and level-shifting circuitry, enabling EN logic signals referenced to a different supply than VIN. Its soft-start function controls output slew rate via internal gate charge control, yielding 115μs typical V_OUT rise time (10%–90%) under 100mA load.

It operates across industrial temperature range (–40°C to +85°C) with guaranteed 2A continuous current at T_A = +25°C and derated 1.4A at +85°C. Thermal protection includes junction limit of +125°C and internal shutdown, while the exposed thermal pad requires direct PCB ground connection for θ_JC = 127°C/W conduction path.

Key Specifications

Pinout & Package

MP62041DQFU-1-LF-Z uses a 4-pin UTQFN package (1.6mm × 1.2mm, 0.55mm height) with exposed thermal pad. Pin 2 is GND and must be soldered to a dedicated PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side load switch applications.

Compared with TPS22915BYFPR and NIS5132MN3TXG, MP62041DQFU-1-LF-Z uniquely delivers 2A capability with active-high enable, integrated level shifting, and controlled 115μs soft-start - making it optimal for mixed-voltage portable systems requiring robust inrush management and minimal board area.

Availability

MP62041DQFU-1-LF-Z is available at Aetrix Electronics and suitable for smartphone subsystem power gating, USB-C port management, wireless earbud battery switchover, and industrial sensor node power gating requiring stable component supply and RoHS-compliant packaging.

Supply support for MP62041DQFU-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, headquartered in Kirkland, WA, with global design and support operations.

The MP6204x series belongs to MPS's high-efficiency power distribution switch product line, engineered specifically for ultra-compact, low-inrush, mixed-rail portable electronics requiring reliable high-side switching with minimal external components.

FAQ

What is the maximum continuous current rating for MP62041DQFU-1-LF-Z at +85°C ambient?

The MP62041DQFU-1-LF-Z supports 1.4A continuous current at +85°C ambient temperature, as specified in the Absolute Maximum Ratings table. This derating accounts for thermal resistance (θ_JA = 173°C/W) and maximum junction temperature of +125°C. Full 2A operation is guaranteed only at +25°C ambient with proper PCB thermal design.

Does MP62041DQFU-1-LF-Z require an external pull-up or pull-down resistor on the EN pin?

No external resistor is required on the EN pin. The device features internal logic-level thresholds (1.2V min high, 0.4V max low) and draws only 4μA max input current. When driven directly by a microcontroller GPIO, EN operates reliably without biasing components - provided the driving source meets voltage and current drive specifications.

Can MP62041DQFU-1-LF-Z be used with input voltages below 1.7V?

No. The absolute minimum input voltage is 1.7V per the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this threshold may result in undefined behavior, incomplete FET turn-on, or failure to meet R_DS(on) and timing specifications. For sub-1.7V applications, consider alternative load switches rated for lower VIN.

How does the level-shift function work in MP62041DQFU-1-LF-Z?

The level-shift circuit isolates the EN logic domain from VIN, allowing EN to be driven by a voltage source independent of the input rail - e.g., a 1.8V GPIO controlling a 5V load. Internally, it translates the EN signal to the appropriate gate drive voltage for the high-side P-MOSFET without requiring external level-shifting components or shared supply references.

Is the exposed thermal pad on the UTQFN4 package electrically connected to GND?

Yes. Pin 2 (GND) and the exposed thermal pad are internally shorted and must be connected to the PCB's main ground plane using multiple thermal vias. This dual-path connection provides both low-impedance grounding and efficient heat conduction, essential to achieve the specified θ_JA = 173°C/W and sustain 2A operation.

What is the recommended output capacitance for stable operation with MP62041DQFU-1-LF-Z?

A minimum 1μF ceramic capacitor is required directly at the OUT pin to stabilize the output during switching transients. For heavy or highly capacitive loads, a bulk electrolytic capacitor (≥10μF) is recommended to reduce ripple and prevent undershoot during turn-on. Total output capacitance should not exceed 100μF without verifying soft-start behavior.

Does MP62041DQFU-1-LF-Z support reverse current blocking?

Yes. As a high-side P-channel MOSFET switch, it inherently blocks reverse current flow from OUT to IN when disabled. The body diode is oriented anode-to-GND, cathode-to-IN, preventing backfeed from downstream loads into the input rail - critical for battery-backed systems and multi-rail isolation.