RT9728AHGE

Overview

The RT9728AHGE is a single-channel P-channel power switch IC designed for load distribution applications. It features a maximum on-resistance of 120 milliohms and supports an output current up to 1.3 amperes. The device operates within a supply voltage range of 2.5 volts to 5.5 volts. It includes programmable current limiting adjustable from 75 milliamperes to 1.3 amperes. Integrated protection mechanisms include over-temperature shutdown, under-voltage lockout, and status flag indication. The component is housed in a SOT-23-6 surface-mount package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a low-loss P-channel MOSFET with a maximum on-resistance of 120 milliohms for efficient power delivery.
• Provides programmable current limit functionality allowing adjustment between 75 milliamperes and 1.3 amperes.
• Includes comprehensive fault protection featuring over-temperature shutdown and under-voltage lockout.
• Offers status flag output to indicate operational state or fault conditions.

Applications

• USB port power switching and distribution
• Peripheral device load protection
• Battery-powered system power management

Procurement Notes

Verify the specific suffix 'AHGE' against the manufacturer datasheet to confirm the exact current limit programming configuration. Ensure the procurement source provides valid RoHS compliance documentation. Confirm that the SOT-23-6 package matches the design footprint requirements. Check for moisture sensitivity level specifications if reflow soldering is required. Validate the operating temperature range suitability for the intended environmental conditions.

Selection Notes

Select this component when a single-channel high-side switch with programmable current limiting is required. The 120 milliohm on-resistance suits applications prioritizing efficiency within the 5.5V limit. Choose this part over fixed-limit switches when adjustable protection thresholds are necessary. Consider the SOT-23-6 package size for space-constrained designs. Verify that the 1.3A maximum current rating aligns with the load requirements.

Part Context

This device belongs to the Richtek RT9728 family of power switch ICs. The family includes variants such as the RT9728BHGE, which offers a higher 1.8A current capability. These components are categorized under PMIC load drivers and USB switches. The RT9728 series targets portable electronics and peripheral interface protection needs.

Replacement Considerations

The RT9728BHGE serves as a functional substitute with increased current capacity. Verify pin compatibility and package dimensions before substitution. Ensure the alternative part meets the same voltage and thermal specifications.