SG2526BDW

Overview

The SG2526BDW is a high-reliability isolated switching regulator manufactured by Microchip Technology. It operates as a voltage-mode PWM controller with an input voltage range of 8V to 35V and a nominal input of 15V. The device features a dual output stage capable of sourcing or sinking up to 0.2A, supporting frequencies up to 350kHz. It includes a trimmed 5V reference with ±1% accuracy and digital current limiting. The component is housed in a 18-pin PDSO package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Voltage-mode pulse width modulation control for stable regulation
• Dual high-current source/sink outputs for flexible driver interfacing
• Integrated digital current limiting for enhanced protection
• Trimmed internal 5V reference ensuring precise output stability

Applications

• High-reliability isolated switching power supplies
• Industrial power management systems requiring robust regulation
• Flyback converter topologies with isolated feedback loops

Procurement Notes

Verify the specific suffix (DW) confirms the SOIC-18 plastic package variant when ordering. Ensure the supply chain source provides official Microchip Technology documentation to confirm the -40°C to +85°C operating range and bipolar process specifications. Cross-reference the part number against the manufacturer's latest datasheet to validate pinout compatibility and thermal performance characteristics before integration.

Selection Notes

Select this component for applications demanding high reliability and isolated switching capabilities. The voltage-mode control architecture suits designs requiring precise frequency tuning between 1Hz and 350kHz. Consider the dual 100mA output capability when driving external power switches directly. The wide input voltage range supports various bus voltages, making it suitable for diverse industrial power conversion requirements without additional pre-regulation stages.

Part Context

The SG2526BDW belongs to the SG2526 family of switching controllers, representing a high-reliability variant often associated with military or aerospace-grade specifications. It serves as a successor or alternative to older bipolar PWM controllers, offering improved current drive capabilities. The device integrates essential protection features like current limiting into a compact 18-pin package, distinguishing it from basic PWM ICs that require external protection circuitry.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.