SI8251-IQ

Power Supply Controllers, Monitors Overview

The SI8251-IQ is a six-channel, isolated SMPS controller manufactured by Skyworks Solutions. It integrates high-side and low-side gate drivers with an internal oscillator and PWM logic. The device provides 6 channels of isolation rated at 5 kV RMS for robust noise immunity in power conversion applications. It operates within a supply voltage range of 4.5 V to 20 V and supports junction temperatures from -40°C to +125°C. The component is housed in a 32-pin LQFP package suitable for surface mount technology.

Power Supply Controllers, Monitors Feature Summary

• Integrates six isolated channels combining PWM logic and gate driver outputs
• Provides high-voltage isolation between control circuitry and power switches
• Includes internal oscillator eliminating external timing components
• Supports flexible switching frequencies via external resistor programming

Power Supply Controllers, Monitors Applications

• Multi-phase synchronous buck converters
• High-density DC-DC power modules
• Server and data center power supplies
• Industrial motor drives requiring multi-channel control

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix code against official Skyworks documentation to confirm pinout compatibility and isolation ratings. Ensure the procurement source provides valid RoHS compliance certificates. Confirm that the 32-LQFP package matches the target PCB footprint requirements before finalizing orders.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing systems requiring multiple isolated gate drive signals from a single controller. Consider the thermal performance of the 32-pin LQFP package under high-frequency operation. Evaluate the need for external bootstrap capacitors based on the specific duty cycle requirements of the application.

Power Supply Controllers, Monitors Part Context

This part belongs to the Skyworks isolated controller family designed for advanced power management. It replaces discrete solutions comprising separate controllers and isolators, thereby reducing board space and component count. The integration simplifies layout constraints while maintaining signal integrity in noisy environments.

Power Supply Controllers, Monitors Replacement Considerations

Direct replacements require matching the 6-channel configuration and 32-pin LQFP package. Verify that alternative parts support similar isolation voltages and operating temperature ranges. Cross-reference pin assignments carefully as functional equivalents may differ in control logic or driver strength.