MP62551DGT-LF-Z

Overview

The MP62551DGT-LF-Z is a single-channel power distribution switch manufactured by Monolithic Power Systems. It operates within a supply voltage range of 2.5 V to 5.5 V and supports an output current of 1.5 A with a current limit of 1.7 A. The device features a maximum on-resistance of 135 mOhms and dissipates up to 1.56 W of power. It utilizes a TQFN-6 surface-mount package and functions as an active-high switch. The component is rated for operation between -40°C and +85°C, with a maximum turn-on time of 3 ms and a maximum dwell time of 30 ms.

Feature Summary

• Integrates adjustable current limiting protection to safeguard downstream loads from overcurrent conditions.
• Includes thermal shutdown circuitry to prevent damage during excessive temperature events.
• Features controlled slew rate capability to minimize inrush currents during power-up sequences.

Applications

• Power distribution networks in portable computing devices
• Peripheral load switching in consumer electronics
• Hot-swap applications requiring controlled turn-on timing

Procurement Notes

Verify the specific suffix DGT against official MPS documentation to confirm the TQFN-6 package configuration. Ensure the LF-Z designation aligns with required RoHS compliance standards for your manufacturing process. Cross-reference the active-high logic requirement with your system control interface to guarantee correct signal compatibility before finalizing procurement orders.

Selection Notes

Select this component when a single-channel high-side switch with integrated current limiting is required for low-voltage systems. The TQFN-6 package offers a compact footprint suitable for space-constrained designs. Consider the 135 mOhm on-resistance and 1.5 A continuous current rating to ensure adequate thermal performance without external heat sinking in typical ambient conditions.

Part Context

This part belongs to the MP62551 series of power distribution switches from Monolithic Power Systems. It is functionally similar to the MP62550DJ-LF-Z but differs in package type and control logic polarity. The series provides integrated protection features commonly found in modern portable electronic power management architectures.

Replacement Considerations

MP62550DJ-LF-Z: Offers identical electrical specifications including 1.5 A output and 135 mOhm resistance but uses a TSOT-23-6 package and operates with active-low logic instead of active-high.

FAQ

What is the maximum operating voltage for the MP62551DGT-LF-Z?

The maximum operating supply voltage is 5.5 V.

Does this device include output discharge functionality?

Official datasheets for the MP62551 series do not explicitly list integrated output discharge as a standard feature compared to other variants like the MP62040-1.