Monolithic Power Systems Inc. MP62350EK-LF-P

Overview

MP62350EK-LF-P from Monolithic Power Systems is a dual-channel, active-low enable, current-limited power distribution switch with 500mA continuous per channel, 85mΩ R_DS(ON), and integrated output discharge (100Ω). It operates from 2.7V to 5.5V input and delivers overcurrent protection via constant-current limiting and thermal shutdown at 140°C-used in USB power rails and peripheral hot-swap circuits.

For engineers reviewing the MP62350EK-LF-P datasheet, MP62350EK-LF-P pinout, MP62350EK-LF-P application, or MP62350EK-LF-P equivalent, key selection criteria include guaranteed 500mA current limit accuracy, dual independent EN/FLAG signaling, 8ms FLAG deglitch timing, reverse current blocking, and MSOP-8 thermal performance (θ_JA = 150°C/W).

Technical Context

The MP62350EK-LF-P integrates two independent N-channel MOSFET power switches with matched current-limit thresholds (550–1100mA) and separate open-drain FLAG outputs for per-channel fault reporting. Each channel features under-voltage lockout (1.95–2.65V rising edge) and 20°C thermal hysteresis for reliable recovery after shutdown.

Its internal discharge path (100Ω) actively sinks charge from external output capacitors during disable, eliminating residual voltage that could cause backfeed or latch-up. The device supports TTL/CMOS-compatible EN inputs and blocks reverse current when IN = GND and OUT = 5.5V (leakage < 0.2μA).

Key Specifications

Pinout & Package

MP62350EK-LF-P is housed in an 8-pin MSOP package (3.0mm × 3.0mm, 0.65mm pitch), optimized for space-constrained portable designs with moderate power dissipation (0.8W max at +25°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP5095DJ-LF-Z and TPL92012RGER, MP62350EK-LF-P uniquely combines dual independent control, guaranteed 500mA limiting, and integrated 100Ω discharge in a compact MSOP-8-making it optimal for space- and feature-constrained portable USB and hot-swap applications despite its legacy status.

Availability

MP62350EK-LF-P is available at Aetrix Electronics and suitable for USB peripheral power switching, PC Card hot-swap interfaces, and notebook subsystem load management requiring stable component supply and long-term design continuity.

Supply support for MP62350EK-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 core expertise in DC/DC conversion, LED drivers, and intelligent power switches.

The MP62350/MP62351 series was designed specifically for portable and embedded systems requiring robust, integrated load switching with minimal external components-targeting smartphone, PDA, and notebook PC power architectures.

FAQ

Is MP62350EK-LF-P still recommended for new designs?

No-Monolithic Power Systems explicitly marks MP62350/MP62351 as "NOT RECOMMENDED FOR NEW DESIGNS" and directs users to MP5095. However, MP62350EK-LF-P remains fully supported for existing designs, with documented parametric performance, long-term availability commitments, and full technical documentation archived on mps.com.

What is the functional difference between MP62350EK and MP62351EK?

MP62350EK uses active-low enable logic (ENx = low to turn on), while MP62351EK uses active-high enable logic (ENx = high to turn on). All other electrical specifications-including current limit, R_DS(ON), FLAG behavior, and thermal shutdown-are identical. Pinout and package are fully interchangeable.

Does MP62350EK-LF-P support reverse current blocking during disable?

Yes-when IN = GND and OUT = 5.5V, reverse leakage is specified at ≤0.2μA. This blocking function prevents backfeeding from powered downstream circuits into a disabled or unpowered input rail, essential for USB OTG and battery-isolation use cases.

How does the 8ms FLAG deglitch time affect fault response?

The 8ms deglitch window filters brief current spikes (e.g., capacitor inrush) that would otherwise trigger false FLAG assertions. True overcurrent faults-such as sustained shorts-assert FLAG within 8ms, while transient events below this threshold are ignored, reducing unnecessary system interrupts.

Can MP62350EK-LF-P drive a 100μF output capacitor reliably?

Yes-the datasheet specifies turn-on time (T_on) and turn-off time (T_off) with CL = 100μF and RL = 11Ω: T_on = 3ms and T_off = 10ms. These values confirm stable soft-start and controlled discharge behavior even with large ceramic or polymer output capacitance.

What is the maximum power dissipation in MSOP-8 at +60°C ambient?

Using θ_JA = 150°C/W and T_J(MAX) = 150°C: P_D(MAX) = (150 – 60) / 150 = 0.6W. This aligns with the datasheet's 0.8W rating at +25°C and confirms safe operation up to +60°C ambient with appropriate PCB copper area.

Does the device require external components for basic operation?

No-MP62350EK-LF-P operates with only input and output bulk capacitors. The integrated discharge path, UVLO, thermal shutdown, and FLAG deglitch eliminate need for external resistors, capacitors, or diodes-reducing BOM count and layout complexity.