LT3999EDD#PBF

Overview

The LT3999EDD#PBF is a monolithic, high-voltage, high-frequency DC/DC transformer driver manufactured by Analog Devices Inc. It operates within an input voltage range of 2.7V to 36V and provides a single adjustable output capable of delivering up to 1A of current. The device utilizes a push-pull topology to generate isolated power in a compact footprint. It features duty cycle control for input voltage compensation, enabling operation across wide input ranges with low dropout regulator losses. The component is housed in a 10-WFDFN package with exposed pad and supports switching frequencies between 50kHz and 1MHz.

Feature Summary

• Monolithic push-pull DC/DC transformer driver providing isolated power
• Integrated duty cycle control for delta Vin compensation
• Wide input voltage range capability
• Small solution footprint with minimal external passive components

Applications

• Medical instruments requiring noise-sensitive isolated power
• Industrial sensing and control systems
• Data conversion equipment
• Wide band communications infrastructure

Procurement Notes

Verify the specific suffix designation against official Analog Devices documentation to confirm pinout and thermal characteristics. Confirm availability status through authorized distributors as supply constraints may apply. Ensure the selected package variant matches the required PCB layout specifications for optimal thermal performance and electrical integrity.

Selection Notes

Select this component when designing isolated power supplies requiring high-frequency operation and wide input voltage tolerance. The integrated duty cycle control simplifies design for applications with varying input sources. Consider the 10-WFDFN package size for space-constrained layouts. Evaluate thermal requirements based on the expected load current and ambient temperature conditions.

Part Context

The LT3999 belongs to Analog Devices' family of high-voltage DC/DC drivers designed for transformer-based isolation. It addresses the need for compact, efficient isolated power solutions in modern electronic systems. The device integrates control logic and gate drivers to minimize external component count while maintaining high performance standards for sensitive applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.