SG3525 PWM Controller IC For DC-DC Converter

SG3525 PWM Controller IC – 8V–35V Input, Adjustable Frequency, Totem-Pole Output

SG3525 PWM Controller is a precision IC designed for efficient power regulation in switching power supplies, DC-DC converters, and industrial control systems. Operating across a wide input voltage range of 8V to 35V, it delivers stable PWM output with adjustable frequency from 100Hz to 400kHz. This IC from onsemi features a tightly regulated ±1% 5.1V reference, soft-start, under-voltage lockout, and a totem-pole output stage that sources or sinks up to 200mA—ideal for driving MOSFETs in demanding power control applications.

With built-in sync input, overcurrent protection, and adjustable deadtime, the SG3525 simplifies design and enhances system safety. Its strong output capability reduces the need for external drivers, minimizing BOM cost and improving circuit efficiency. Suitable for solar inverters, EV chargers, UPS systems, and renewable energy control, it is a go-to solution for engineers working on high-reliability, high-frequency switching designs.

Key Specs Input Voltage Range: 8V–35V Output Drive: ±200mA Totem-Pole Reference Voltage: 5.1V ±1% Frequency Range: 100Hz–400kHz Soft Start & UVLO: Integrated Sync Capability: Yes Applications: Power Supplies, Inverters, DC-DC Converters, EV Chargers Package: DIP/SOIC Manufacturer: onsemi Compliance: RoHS & Pb-Free