SG2526BN

Overview

The SG2526BN is a high-reliability, voltage-mode PWM switching controller manufactured by Microchip Technology. It operates within an input voltage range of 8 V to 35 V and supports Buck, Flyback, and Forward topologies. The device features two outputs with a maximum duty cycle of 49% and a switching frequency of 500 kHz. It provides 100 mA output current capability and includes shutdown functionality. Operating temperatures range from 0°C to +70°C. The component is housed in a PDIP-18 package for through-hole mounting.

Feature Summary

• Voltage-mode pulse width modulation control for isolated switching regulators
• Dual output configuration supporting multiple power converter topologies
• Integrated shutdown pin for system power management

Applications

• High-reliability isolated switching power supplies
• Buck converter designs requiring precise voltage regulation
• Flyback transformer-based power conversion systems

Procurement Notes

Verify the specific manufacturer designation, as historical data indicates production by Microsemi Corporation prior to acquisition by Microchip Technology. Confirm that the PDIP-18 package matches your board layout requirements. Ensure the operating temperature range of 0°C to +70°C meets your environmental specifications. Check RoHS compliance status directly with the supplier for the specific batch. Validate the 500 kHz switching frequency against your electromagnetic interference constraints.

Selection Notes

Select this component when a robust, voltage-mode PWM controller is required for industrial or military-grade applications. The dual-output capability allows for complex power sequencing or multi-rail generation without additional logic. Consider the 49% maximum duty cycle limitation when designing step-down converters to ensure adequate headroom. The through-hole PDIP-18 package is suitable for prototyping or high-vibration environments where mechanical stability is critical.

Part Context

The SG2526BN belongs to the SG3526B series of regulating pulse width modulators. It is designed for high-reliability applications where consistent performance under varying load conditions is essential. The device integrates essential protection features and timing controls into a single monolithic IC, reducing external component count compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with legacy SG2526 variants if cross-referencing older designs.