Monolithic Power Systems Inc. MP62340DH-1-LF-Z

Overview

MP62340DH-1-LF-Z from Monolithic Power Systems is a dual-channel, current-limited power distribution switch with active-low enable inputs, 85 mΩ R_DS(on), 1 A continuous per channel, and integrated output discharge (100 Ω). It operates from 2.7 V to 5.5 V input and delivers precise current limiting (1.1–2.2 A trip range) with thermal shutdown at 140 °C. Used in USB power distribution and hot-swap circuits where fault protection and controlled turn-off are critical.

For engineers reviewing the MP62340DH-1-LF-Z datasheet, MP62340DH-1-LF-Z pinout, MP62340DH-1-LF-Z application, or MP62340DH-1-LF-Z equivalent, key selection criteria include guaranteed current limit accuracy, dual-channel independent control, open-drain FLAG response timing (8 ms deglitch), reverse current blocking, and SOIC8 package compatibility with industrial temperature range (–40 °C to +85 °C).

Technical Context

The MP62340DH-1-LF-Z implements two independent high-side MOSFET switches with matched current-limit circuitry, UVLO (1.95–2.65 V rising edge), and thermal sensing with 20 °C hysteresis. Each channel features dedicated open-drain FLAG outputs that assert after 8 ms deglitch delay upon overcurrent or thermal fault.

Its internal charge pump enables full enhancement of the N-channel MOSFETs across the 2.7–5.5 V input range, while the output discharge path activates only when EN is deasserted or VIN falls below UVLO - not during normal switching transitions. Reverse current blocking is inherent due to MOSFET body diode orientation and gate control logic.

Key Specifications

Pinout & Package

MP62340DH-1-LF-Z is housed in an 8-pin SOIC package (no exposed pad), compliant with JEDEC MS-012 AA, with 1.27 mm pitch and 3.90–4.00 mm width. Pin 1 is marked with a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2036IPW and TPS22965DCKR, MP62340DH-1-LF-Z uniquely delivers per-channel current limiting with deglitched FLAG reporting and integrated discharge - enabling autonomous fault containment in space-constrained, multi-rail embedded systems without added discretes.

Availability

MP62340DH-1-LF-Z is available at Aetrix Electronics and suitable for USB power distribution, notebook PC subsystem management, and telecom line card protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP62340DH-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, with design centers in the US, China, and Taiwan.

The MP62340 product line targets compact, reliable power distribution in portable and embedded systems - emphasizing fault resilience, minimal external components, and seamless integration with host microcontrollers via simple enable/flag interfaces.

FAQ

What is the maximum allowable input voltage for MP62340DH-1-LF-Z?

The absolute maximum input voltage (IN to GND) is +6.0 V. Continuous operation above 5.5 V violates the recommended operating range and may cause premature device failure or parametric shift. The UVLO circuit ensures operation only within 2.7–5.5 V, and exceeding 6.0 V risks permanent damage to internal MOSFETs and gate drivers.

Does MP62340DH-1-LF-Z support simultaneous enable of both channels?

Yes - EN1* and EN2* operate independently; both can be pulled low simultaneously to activate OUT1 and OUT2. No timing skew or interlock is imposed. Each channel maintains its own current limit, thermal monitoring, and FLAG assertion, allowing fully parallel or staggered turn-on based on system requirements.

How does the output discharge function behave during thermal shutdown?

The discharge path remains active during thermal shutdown as long as EN1*/EN2* are low and VIN is above UVLO. Discharge only deactivates when EN is high (disabled state) or VIN drops below UVLO threshold - not during thermal fault events. This ensures output capacitors remain safely discharged even during fault conditions.

Can FLAG1 and FLAG2 be wire-OR'd together?

Yes - both are open-drain outputs with identical electrical specs (I_SINK ≥5 mA, V_OL ≤0.4 V). A single pull-up resistor suffices for combined fault indication, though per-channel diagnostics are lost. Use separate pull-ups if independent fault identification is required for system-level error logging.

Is MP62340DH-1-LF-Z compatible with 3.3 V logic enable signals?

Yes - EN1* and EN2* accept TTL/CMOS-compatible thresholds: logic low ≤0.8 V and logic high ≥2.0 V. A 3.3 V GPIO asserting low (0 V) or high (3.3 V) meets these specifications directly, with no level-shifting needed. Input leakage is ≤1 μA, minimizing drive burden.

What is the typical turn-off delay when disabling a channel?

Measured from 50% EN signal to 10% output voltage, typical turn-off time (T_off) is 10 ms with C_L = 100 μF and R_L = 5.5 Ω. This includes MOSFET gate discharge and output capacitor decay through the 100 Ω internal discharge path - critical for timing-critical hot-swap sequences.

Does MP62340DH-1-LF-Z require external capacitors for stability?

A minimum 10 μF ceramic or tantalum capacitor between IN and GND is recommended to suppress input transients and improve short-circuit immunity. Output capacitance is application-dependent; large electrolytic caps (>100 μF) reduce load transient droop but increase turn-off time and discharge energy - sizing must balance performance and safety.