LT1424IN8-9#PBF

Overview

The LT1424IN8-9#PBF is an isolated flyback switching regulator manufactured by Analog Devices. It operates with a fixed 9 V output and supports up to 200 mA load current. The device accepts input voltages ranging from 2.8 V to 20 V. Key electrical parameters include a switching frequency of 285 kHz, a maximum operating temperature of +125 C, and a minimum operating temperature of -40 C. The quiescent current is specified at 7 mA. It features a shutdown function and is housed in an 8-pin PDIP package.

Feature Summary

• Provides galvanic isolation via integrated flyback transformer drive capability
• Includes internal high-voltage startup circuitry for simplified design
• Features cycle-by-cycle current limiting for robust protection

Applications

• Isolated power supplies for industrial instrumentation
• Telecommunications equipment requiring isolated rails
• Medical devices needing certified isolation barriers

Procurement Notes

Verify the specific suffix #PBF confirms lead-free compliance and RoHS status against the latest manufacturer datasheet. Confirm the PDIP-8 package availability as distribution channels may vary. Ensure the 9V output variant matches the system requirement, as other voltage options exist within the LT1424 series. Check for any recent PCN updates regarding manufacturing site changes.

Selection Notes

Select this component when an isolated 9V rail is required from a low-voltage input source between 2.8V and 20V. The 200mA output current capability suits moderate power applications. Consider the 285kHz switching frequency for balancing component size and efficiency. The wide operating temperature range makes it suitable for harsh environments. Verify that the external transformer design aligns with the controller's current limit specifications.

Part Context

This part belongs to the LT1424 family of isolated flyback controllers. Unlike non-isolated regulators, it drives an external transformer to provide safety isolation. The IN8 suffix denotes the industrial temperature grade (-40C to +125C) and PDIP-8 package. The -9 suffix specifies the fixed 9V output version, distinguishing it from adjustable or other fixed voltage variants in the same series.

Replacement Considerations

LT1424IN8-5#PBF: Provides 5V output instead of 9V; otherwise similar topology and package.