Monolithic Power Systems Inc. MP6233DH-LF

Overview

MP6233DH-LF from Monolithic Power Systems is a dual-channel, current-limited power distribution switch with two independent 1.5A-rated 85mΩ MOSFETs, operating from 2.7V to 5.5V input, featuring thermal shutdown, under-voltage lockout, and open-drain FLAG outputs for over-current detection-used in USB power distribution and PC Card hot-swap circuits.

For engineers reviewing the MP6233DH-LF datasheet, MP6233DH-LF pinout, MP6233DH-LF application, or MP6233DH-LF equivalent, key selection criteria include guaranteed 1.5A continuous current per channel, 8ms FLAG deglitch timing, reverse current blocking, MSOP8E package with exposed thermal pad, and active-high enable logic compatibility with CMOS/TTL.

Technical Context

The MP6233DH-LF integrates two independent high-side power switches with internal current-limiting circuitry that transitions into constant-current mode at ≥2.7A trip threshold (typical), followed by thermal shutdown at 140°C junction temperature with 20°C hysteresis. Each channel features dedicated ENx and FLAGx pins for discrete control and fault reporting.

It implements under-voltage lockout (1.95V rising edge) to prevent erratic operation during brownout, and supports reverse current blocking to isolate downstream loads. The 85mΩ R_DS(on) is specified across –40°C to +85°C ambient, with <140μA quiescent supply current when both channels are enabled and unloaded.

Key Specifications

Pinout & Package

The MP6233DH-LF is housed in an MSOP8E package with an exposed thermal pad on the underside, requiring connection to PCB ground plane for optimal thermal performance and current handling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2051BDR and NCP45520MUTBG, the MP6233DH-LF uniquely combines dual-channel independence, reverse current blocking, and integrated 8ms-deglitched FLAG reporting in a single MSOP8E package-enabling compact, self-protected USB and hot-swap designs without external components.

Availability

MP6233DH-LF is available at Aetrix Electronics and suitable for USB power distribution, PC Card hot-swap, and notebook PC power management requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.

Supply support for MP6233DH-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP6233 belongs to MPS's power distribution switch product line, engineered specifically for reliable, compact, and self-protected load switching in portable and embedded systems where space, thermal margin, and fault resilience are critical.

FAQ

What is the maximum continuous current per channel for MP6233DH-LF?

The MP6233DH-LF delivers 1.5A continuous current per channel at +25°C ambient, with derating to maintain safe junction temperature under higher ambient or sustained load conditions. The device enters constant-current mode at ≥2.7A trip threshold before thermal shutdown activates at 140°C.

Does MP6233DH-LF support reverse current blocking?

Yes-the MP6233DH-LF inherently blocks reverse current flow from OUTx to IN when disabled, with measured leakage of only 0.2μA at OUTx = 5.5V and IN = GND. This eliminates need for external blocking diodes in battery-backed or multi-rail systems.

How does the FLAG pin behave during power-up?

The FLAG pin remains inactive (high-impedance/open-drain high) during power-up and does not assert false faults-even if load is pre-connected or shorted-because the internal deglitch circuit is disabled until normal operation begins, ensuring clean system initialization.

What is the recommended input capacitance for MP6233DH-LF?

A minimum 10μF ceramic or tantalum capacitor between IN and GND is recommended to suppress input transients and improve immunity to short-circuit events. Additional bulk capacitance may be added based on load step requirements and PCB layout constraints.

Can EN1 and EN2 be tied together for synchronous control?

Yes-EN1 and EN2 may be connected to a common enable signal for simultaneous channel activation. However, doing so forfeits independent fault isolation; separate control preserves per-channel FLAG reporting and avoids cascaded shutdown during single-load faults.

Is the MSOP8E package thermally enhanced?

Yes-the MSOP8E package includes an exposed thermal pad on the bottom side, which must be soldered to a PCB copper pour connected to GND. This reduces θ_JA to 55°C/W and enables full 1.5A per channel operation within ambient limits.

What happens during an over-current event?

Upon over-current detection, the MP6233DH-LF enters constant-current mode at its trip threshold (~2.7A). If the condition persists and junction temperature reaches 140°C, thermal shutdown disables the affected channel. Recovery occurs automatically once die temperature falls below ~120°C.