SG1526BJ

Overview

The SG1526BJ is a high-performance monolithic pulse width modulator circuit designed for fixed-frequency switching regulators and other power control applications. Manufactured by Microchip Technology, this component utilizes silicon technology and features an isolated topology suitable for buck and flyback converter configurations. It operates within a voltage range of 8V to 35V and supports switching frequencies up to 500 kHz. The device provides two output channels with a maximum output current of 100 mA and a maximum duty cycle of 49%. It functions reliably across an extended temperature range from -55°C to +125°C.

Feature Summary

• Integrates a temperature-compensated voltage reference, sawtooth oscillator, error amplifier, and pulse width modulator within a single monolithic circuit.
• Includes dedicated pulse metering and steering logic alongside two low-impedance power drivers for efficient switching control.
• Supports both buck and flyback topologies with isolated switching regulator capabilities for robust power management.

Applications

• Fixed-frequency DC-to-DC switching regulators
• Buck and flyback converter designs
• General power control applications requiring voltage mode PWM

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as SG1526BJ-883B or SG1526BJ-JAN may exist with distinct reliability standards or qualification requirements. Confirm availability status directly with the manufacturer or authorized distributors, as supply conditions can change. Ensure that the selected package type matches the intended PCB layout and thermal management strategy. Cross-reference datasheet revisions to confirm pinout compatibility and electrical specifications before finalizing procurement decisions.

Selection Notes

Select the SG1526BJ for applications requiring a reliable voltage-mode PWM controller with integrated power drivers. Consider the operating temperature range and isolation requirements when evaluating suitability for industrial or aerospace environments. Compare the 100 mA output drive capability against load requirements to ensure adequate performance. Verify that the 500 kHz maximum switching frequency aligns with the desired efficiency and component size constraints in the target power supply design.

Part Context

The SG1526BJ belongs to the SG1526B series of switching controllers, which are engineered to offer improved functional and electrical characteristics over earlier generations. This series is widely recognized for its versatility in various power conversion architectures. The component serves as a core control element in systems demanding precise duty cycle regulation and stable operation under varying load conditions.

Replacement Considerations

Public confirmed substitute part numbers include SG1526BJ-883B and SG1526BJ-JAN. These variants share the same core functionality but may differ in qualification standards or packaging details. Verify specific suffix requirements to ensure compliance with project specifications.