LT1170HVCQ#PBF

Overview

The LT1170HVCQ#PBF is a monolithic high-power switching regulator from Analog Devices, designed for versatile DC-DC conversion applications. It integrates a high-current, high-efficiency internal switch along with complete oscillator, control, and protection circuitry on a single die. The device supports an input voltage range of 3 V to 60 V and delivers up to 5 A output current, enabling output power capabilities of 100 W. It operates at a fixed switching frequency of 100 kHz and features adjustable output voltage. The component is housed in a 6-pin (5+Tab) DDPAK tube package, suitable for surface mount installation.

Feature Summary

• Supports multiple standard switching topologies including buck, boost, flyback, forward, inverting, and Cuk configurations.
• Integrates a high-current, high-efficiency power switch with all necessary oscillator, control, and protection circuits on-die.
• Capable of driving external high-voltage FETs for off-line applications with up to 5 A drive current.

Applications

• LCD contrast power supplies requiring negative voltage generation
• Off-line applications driving high-voltage FETs
• General-purpose DC-DC converters using forward or flyback topologies

Procurement Notes

Verify the specific suffix and tape/reel versus tube packaging details directly with Analog Devices or authorized distributors, as availability may vary. Confirm that the DDPAK-5/6 pin configuration matches your PCB footprint requirements. Ensure thermal management solutions are adequate for the intended power dissipation levels given the 100 W capability.

Selection Notes

Select this component when a single IC needs to support various converter topologies without external driver complexity. It is suitable for designs requiring wide input voltage ranges up to 60 V. Consider the thermal performance of the DDPAK package if operating near maximum current limits. Verify that the 100 kHz switching frequency aligns with your electromagnetic interference constraints.

Part Context

The LT1170 series represents a family of high-power switching regulators known for their flexibility in topology selection. The HVCQ variant specifically denotes the commercial temperature grade version packaged in the DDPAK format. This part serves as a foundational building block for power supply designs across industrial and consumer electronics where efficiency and integration are prioritized.

Replacement Considerations

LT1170HVCT#PBF: Similar functionality but in TO-220 package; verify thermal and mechanical fit.

FAQ

What switching topologies does the LT1170HVCQ#PBF support?

It supports buck, boost, flyback, forward, inverting, and Cuk configurations.

What is the maximum output current capability of this regulator?

The device provides an output current of up to 5 A.