SG2526DW

Overview

The SG2526DW is a voltage-mode PWM switching controller manufactured by Microchip Technology. It operates within an input voltage range of 8 V to 35 V, with a nominal rating of 15 V. The device features a dual output stage capable of sourcing and sinking up to 0.2 A (200 mA) peak current. It supports a maximum switching frequency of 350 kHz and includes a precision 5 V reference trimmed to ±1%. The component is housed in an 18-pin PDSO package and is rated for operation between -25°C and 70°C.

Feature Summary

• Voltage-mode pulse width modulation control architecture
• Dual high-current source/sink outputs for direct drive capability
• Integrated oscillator with wide frequency adjustment range
• Built-in digital current limiting protection mechanism

Applications

• DC-DC buck converter power supplies
• Flyback transformer-based isolated power conversion
• Regulated industrial power supply units
• Step-up and step-down voltage regulation circuits

Procurement Notes

Verify the specific manufacturer origin, as the SG2526 series has historical lineage from National Semiconductor and Microsemi. Confirm that the datasheet provided matches the Microchip Technology specification sheet to ensure accurate parameter alignment. Check for any ordering suffix variations that may indicate temperature range or packaging differences. Ensure compliance with RoHS standards if required for your assembly process.

Selection Notes

Select this component when a robust voltage-mode controller with high-output drive capability is required. The dual 200mA outputs eliminate the need for external driver transistors in many topologies. Consider the 350kHz maximum frequency for balancing efficiency and component size. Verify that the 8V to 35V input range aligns with your system's bus voltage requirements.

Part Context

The SG2526DW belongs to the legacy SG2525/SG2526 family of PWM controllers, widely used in industrial and commercial power supplies. It serves as a successor to earlier bipolar versions, offering improved performance in a surface-mount SOIC-18 package. The device is functionally compatible with other industry-standard PWM controllers but provides specific drive strength advantages.

Replacement Considerations

The SG2526BDW is a related variant, distinguished primarily by its 16-pin SOIC package compared to the 18-pin SOIC of the SG2526DW. Direct pin-to-pin substitution is not possible due to the package difference. Other generic replacements may require circuit redesign to accommodate different drive currents or control logic.