AP2155SG-13

Overview

The AP2155SG-13 is a single-channel high-side power switch from Diodes Incorporated, optimized for USB and hot-swap applications. It operates within a supply voltage range of 2.7 V to 5.5 V and delivers an output current of 500 mA with an 800 mA current limit. The device features a maximum on-resistance of 140 mOhms and includes thermal limiting, short-circuit protection, and controlled rise time. It utilizes an SOP-8 package and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Integrated high-side switching with active low enable input
• Built-in thermal and current limiting for overload protection
• Controlled rise time to minimize inrush currents
• Under-voltage lockout functionality for stable operation

Applications

• USB port power distribution
• Hot-swap peripheral connections
• Battery-powered device load switching

Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout and enable polarity. Ensure the SOP-8 package matches the target PCB footprint. Confirm RoHS compliance status through official documentation before integration into regulated products.

Selection Notes

Select this component for single-channel applications requiring 500 mA continuous load. Compare against the AP2145 variant if an active-high enable signal is required instead of active-low. Consider the AP2156 series for dual-channel requirements within the same voltage envelope.

Part Context

This part belongs to the AP21xx family of integrated power switches designed for portable electronics. It shares architectural similarities with the AP2145 but differs in control logic polarity. The series addresses the need for compact, reliable power management in space-constrained mobile devices.

Replacement Considerations

AP2145SG-13: Verify enable input polarity difference (Active High vs Active Low). AP2156SG-13: Requires dual-channel design adaptation.