LT1247CN8#PBF

Overview

The LT1247CN8#PBF is a buck switching controller IC from Analog Devices Inc., designed for high-performance DC-DC converters. It operates at a fixed 1 MHz switching frequency, enabling efficient power management in compact designs. The device supports an input supply voltage range of 8.4 V to 25 V and features a maximum duty cycle of 100%. Packaged in an 8-pin PDIP format, it functions as a non-isolated step-down converter controller suitable for offline applications.

Feature Summary

• Fixed 1 MHz switching frequency for optimized component size and efficiency
• Capable of 100% maximum duty cycle operation for wide input voltage ranges
• Integrated control loop compensation for stable regulator performance

Applications

• Offline power supplies
• High-frequency DC-DC converters
• Battery chargers

Procurement Notes

Verify the specific package variant when ordering, as the LT1247 series includes both SOIC and PDIP options. Confirm that the #PBF suffix indicates lead-free compliance and RoHS adherence. Ensure the selected part matches the required thermal and electrical specifications for the target application environment.

Selection Notes

Select this component for designs requiring a fixed 1 MHz switching frequency to minimize passive component sizes. It is suitable for applications needing a wide input voltage range up to 25 V. Consider the PDIP package for through-hole mounting requirements or prototyping phases where ease of handling is prioritized over board space constraints.

Part Context

This part belongs to the LT1247 series of switching controllers, which are engineered for off-line and DC/DC conversion tasks. The series utilizes C Mode PWM technology to provide constant frequency operation with variable duty cycle control. The CN8#PBF designation specifically identifies the PDIP-8 package version within this family.

Replacement Considerations

LT1247CS8#PBF (SOIC-8 package equivalent)