LT1424CN8-9#PBF

Overview

The LT1424CN8-9#PBF is an isolated flyback switching regulator manufactured by Analog Devices Inc. It operates within a 3 V to 20 V input voltage range and delivers a fixed 9 V output at up to 200 mA. The device integrates a high-current switch, oscillator, and control circuitry for primary-side regulation without requiring opto-isolators or tertiary windings. It functions in a PDIP-8 package with a maximum switching frequency of 310 kHz and supports shutdown functionality.

Feature Summary

• Primary-side sensing eliminates the need for opto-isolators or tertiary windings
• Integrated high-efficiency power switch reduces external component count
• Fixed 9 V output configuration simplifies design implementation
• Built-in protection circuitry ensures operational reliability

Applications

• Isolated DC-DC conversion in compact power supplies
• Flyback topology designs requiring simplified feedback loops
• Low-power adapter applications with fixed voltage requirements

Procurement Notes

Verify the complete part number including the suffix #PBF to ensure lead-free compliance and correct packaging. Confirm that the PDIP-8 through-hole package matches the target PCB footprint. Check manufacturer documentation for RoHS status updates and supply chain restrictions. Ensure the specific 9 V output variant is selected rather than other voltage options within the LT1424 series.

Selection Notes

Select this component when primary-side regulation is preferred to reduce bill-of-materials cost and board space. The fixed 9 V output limits flexibility but simplifies design for standard logic levels. Consider the 200 mA current limit for load requirements. Verify thermal performance within the specified operating temperature range for the chosen application environment.

Part Context

This part belongs to the LT1424 family of monolithic switching regulators designed specifically for isolated flyback converters. The CN8 designation indicates a commercial temperature range PDIP-8 package. The -9 suffix specifies the fixed 9 V output version. Analog Devices integrates the power switch and control logic to streamline isolated power supply designs.

Replacement Considerations

LT1424CS8-9#PBF offers the same electrical specifications in a surface-mount SOIC-8 package. Verify pin compatibility and thermal dissipation differences between DIP and SOIC packages before substitution.