LT1171HVIQ#PBF

Overview

The LT1171HVIQ#PBF is a monolithic high-power switching regulator from Analog Devices Inc. It operates with an input voltage range of 3V to 60V and provides a maximum output current of 2.5A. The device supports multiple standard switching configurations, including buck, boost, flyback, forward, inverting, and Cuk topologies. It features an integrated high-current, high-efficiency switch along with all necessary oscillator, control, and protection circuitry on the die. The component is housed in a DDPAK-5 package and is designed for applications requiring versatile DC-to-DC conversion capabilities.

Feature Summary

• Supports multiple standard switching configurations including buck, boost, flyback, forward, inverting, and Cuk topologies
• Integrates a high-current, high-efficiency power switch on the die
• Includes complete oscillator, control, and protection circuitry internally

Applications

• Positive buck converter circuits
• Negative boost regulator designs
• Positive-to-negative buck-boost converter implementations
• External current limiter applications

Procurement Notes

Verify the specific suffix 'IQ' indicates the commercial temperature grade when sourcing this part. Confirm the '#PBF' designation ensures lead-free compliance as per manufacturer specifications. Cross-reference the datasheet revision date to ensure compatibility with your design requirements. Check for any recent product change notices that might affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a single IC must support various converter topologies without external complex control loops. It is suitable for designs requiring input voltages up to 60V and output currents up to 2.5A. Consider the thermal performance of the DDPAK-5 package for your specific power dissipation needs. Ensure the application does not require synchronous rectification, as this device uses a non-synchronous switch architecture.

Part Context

The LT1171 belongs to a family of monolithic high-power switching regulators that share similar internal architectures but differ in package options and temperature grades. This series allows designers to implement diverse DC-DC conversion functions using a single core controller type. The HVIQ variant specifically denotes the commercial temperature range and surface-mount packaging option within the broader LT1171 product line.

Replacement Considerations

LT1171IQ#PBF serves as a direct substitute with identical electrical specifications and pinout compatibility.