Monolithic Power Systems Inc. MP6233DH-LF-P

Overview

MP6233DH-LF-P from Monolithic Power Systems is a dual-channel, current-limited power distribution switch with 1.5A continuous per channel, 85mΩ internal MOSFETs, and active-high enable logic. It operates from 2.7V to 5.5V input, provides thermal shutdown at 140°C, and delivers reverse current blocking for USB and hot-swap load switching in portable GPS and notebook PC power rails.

For engineers reviewing the MP6233DH-LF-P datasheet, MP6233DH-LF-P pinout, MP6233DH-LF-P application, or MP6233DH-LF-P equivalent, key selection criteria include guaranteed 1.5A current limit per channel, 8ms FLAG deglitch time, under-voltage lockout (1.95V rising edge), MSOP8E package thermal performance, and dual independent enable/flag signaling for fault-isolated power domains.

Technical Context

The MP6233DH-LF-P integrates two independent high-side power switches with matched current-limit thresholds (typ. 2.3A trip) and open-drain FLAG outputs that assert after 8ms deglitch timeout upon overcurrent detection. Each channel features separate ENx control and FLAGx reporting, enabling asymmetric load management without cross-talk.

Its protection architecture combines fast-response current limiting (constant-current mode activation within microseconds of overload), thermal shutdown with 20°C hysteresis, and UVLO with 250mV hysteresis-ensuring robust operation during input brownouts, short circuits, and sustained overloads across –40°C to +85°C ambient.

Key Specifications

Pinout & Package

The MP6233DH-LF-P is housed in an MSOP8E package with exposed thermal pad soldered to PCB ground plane for θ_JA = 55°C/W performance. Pin 1 (GND) and the backside exposed pad must be connected to system ground for optimal thermal dissipation and EMI control.

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-P uniquely combines dual-channel integration, UL certification, reverse current blocking, and precise 8ms deglitch timing-making it optimal for compact, safety-compliant consumer electronics with strict fault-reporting latency requirements.

Availability

MP6233DH-LF-P is available at Aetrix Electronics and suitable for USB power distribution, notebook PC subsystem management, and telecom line card protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MP6233DH-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 power distribution solutions.

The MP6233 belongs to MPS's current-limited power switch product line, engineered specifically for reliable, space-constrained load switching in portable and embedded systems where fault resilience and regulatory compliance are mandatory.

FAQ

What is the maximum allowable input voltage for MP6233DH-LF-P?

The absolute maximum input voltage is +6.0V, but the recommended operating range is 2.7V to 5.5V. Exceeding 5.5V may cause premature device failure due to gate oxide stress or thermal runaway, even if within absolute max ratings. Operation above 5.5V voids warranty and violates UL recognition conditions.

How does the FLAG pin behave during thermal shutdown versus overcurrent events?

The FLAG pin asserts low after 8ms deglitch timeout for overcurrent events only. During thermal shutdown, FLAG remains deasserted-no deglitch is applied, and the pin stays high until the fault clears and the device recovers. This allows firmware to distinguish between electrical overload and thermal overload conditions using timing and state monitoring.

Can MP6233DH-LF-P drive capacitive loads up to 1000µF without instability?

Yes-the device supports up to 1000µF output capacitance with stable turn-on/turn-off behavior, as verified in typical performance curves (Figure 6). However, inrush current scales linearly with C_OUT; for >470µF, ensure input supply can handle peak currents up to 2.3A and verify V_IN droop remains within UVLO threshold.

Is reverse current blocking active when the device is disabled?

Yes-reverse current blocking is inherent to the internal MOSFET structure and remains fully functional whether the device is enabled or disabled. When EN1/EN2 are low, the body diode is reverse-biased, preventing current flow from OUTx back to IN, even with OUTx biased higher than IN.

What is the minimum recommended input capacitance, and why is it critical?

A minimum 10µF ceramic or tantalum capacitor between IN and GND is required. This capacitance suppresses input transients caused by short-circuit events, prevents false UVLO triggering during load switching, and maintains stable gate drive for the internal MOSFETs-ensuring predictable current-limit activation and thermal response.

Does MP6233DH-LF-P support simultaneous enable of both channels?

Yes-EN1 and EN2 are fully independent and can be tied together or driven separately. Simultaneous enable is supported and commonly used in applications like dual-USB port controllers. No timing skew or interaction occurs between channels; each operates autonomously with its own current limit and FLAG reporting.

How is thermal performance affected if the exposed pad is not soldered to GND?

Without soldering the exposed pad to a thermal GND plane, θ_JA degrades from 55°C/W to >100°C/W, causing junction temperature to exceed 150°C at just 0.8A per channel. This risks premature thermal shutdown, reduced lifetime, and potential failure-making proper pad connection mandatory for rated 1.5A operation.