LT1170HVIT#31PBF

Overview

The LT1170HVIT#31PBF is a monolithic high-power switching regulator from Analog Devices Inc., housed in a TO-220-5 package. It operates with an input voltage range of 3V to 60V and delivers up to 5A output current, supporting 100W power levels. The device features a 100kHz switching frequency and adjustable output voltages from 1.244V to 40V (switching voltage up to 75V). Designed for through-hole mounting, it functions across a junction temperature range of -40°C to 100°C.

Feature Summary

• Supports multiple standard switching configurations including buck, boost, flyback, forward, inverting, and Cuk topologies
• Integrates a high-current, high-efficiency internal switch with complete oscillator, control, and protection circuitry
• Provides flexible positive or negative output configuration with adjustable voltage regulation

Applications

• Buck converter circuits
• Boost converter circuits
• Flyback converter designs
• Forward converter applications
• Inverting and Cuk topology implementations

Procurement Notes

Verify the specific suffix #31PBF corresponds to the required tube packaging format when ordering. Confirm that the TO-220-5 Flow 31 package variant matches your thermal and mechanical design requirements. Ensure compatibility with the 100kHz switching frequency and 5A current capabilities for your specific load conditions before finalizing procurement.

Selection Notes

Select this component when a single-chip solution is needed for versatile DC-DC conversion topologies requiring high input voltage tolerance. It is suitable for designs needing integrated protection and control without external discrete drivers. Consider the TO-220-5 package for through-hole assembly and adequate heat dissipation for 5A continuous operation within the specified temperature range.

Part Context

This part belongs to the LT1170 family of high-power switching regulators manufactured by Analog Devices Inc. The LT1170 series is designed for robust performance in various industrial and commercial power supply applications. The HV designation indicates high-voltage capability, while the IT suffix typically denotes the industrial temperature grade and specific package variant.

Replacement Considerations

Direct pin-to-pin replacements are not explicitly documented in the provided source material. Designers should evaluate alternative high-power switching regulators from Analog Devices or other manufacturers that support similar input voltage ranges, current ratings, and multi-topology flexibility.