SC1104AISTRT

Overview

The SC1104AISTRT is a voltage-mode PWM controller designed for single-ended DC/DC power supply applications. It enables the implementation of high-efficiency buck regulators with minimal external components. The device operates at +5V or +12V and features internal level shift and drive circuitry to eliminate the need for expensive P-channel high-side switches. Key electrical parameters include a 1% reference voltage accuracy, hiccup mode over-current protection, and an industrial temperature range. It is housed in an SO-8 package.

Feature Summary

• Internal level shift and drive circuitry eliminates the need for expensive P-channel high-side switches
• Hiccup mode over-current protection for robust fault handling
• High efficiency exceeding 90% in buck regulator configurations
• 1% reference voltage accuracy ensures stable output regulation

Applications

• Termination supplies
• Low cost microprocessor supplies
• Peripheral card supplies
• Industrial power supplies
• High density DC/DC conversion

Procurement Notes

Verify the specific suffix 'ISTRT' corresponds to the tape and reel packaging configuration as indicated by Semtech documentation. Confirm that the component meets RoHS compliance standards required for your manufacturing process. Ensure the SO-8 package footprint matches your PCB layout design constraints before finalizing procurement orders.

Selection Notes

Select this controller when designing simple, fixed-frequency synchronous buck regulators requiring minimal external component counts. It is suitable for applications needing operation from +5V or +12V rails. The internal drive circuitry simplifies design compared to controllers requiring external high-side drivers. Consider the industrial temperature range if operating in harsh environments.

Part Context

The SC1104AISTRT belongs to the SC1104 family of voltage-mode PWM controllers manufactured by Semtech Corporation. This series is engineered for versatile use in single-ended DC/DC power supply applications. The 'A' variant denotes specific performance characteristics within the family, while 'ISTRT' indicates the specific tape and reel packaging format for automated assembly.

Replacement Considerations

Consult Semtech official documentation for confirmed substitute part numbers. The SC1104B is listed as a similar component within the same product family. Verify pin compatibility and electrical specifications before substituting.