LT1171HVCQ#PBF

Overview

The LT1171HVCQ#PBF is a monolithic high-power switching regulator manufactured by Analog Devices Inc. It supports DC-to-DC conversion with an input voltage range of 3V to 60V and delivers up to 2.5A output current, achieving 100W output power. The device operates at a switching frequency of 100kHz and features adjustable output voltages from 1.244V to 40V. Packaged in a 6-pin (5+Tab) DDPAK for surface mount installation, it functions as a synchronous step-down or step-up converter. The component is rated for 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 switch on the die along with oscillator, control, and protection circuitry
• Provides adjustable output voltage capability across a wide operational range

Applications

• LCD contrast power supply generation
• Positive buck converter implementations
• Negative boost regulator circuits
• Positive-to-negative buck-boost converter designs

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the DDPAK-5 package variant matches your PCB footprint requirements. Ensure the supplier provides the official LT1170-72 datasheet for accurate electrical parameter validation. Check that the component status remains active for long-term availability. Cross-reference the manufacturer part number with distributor catalogs to avoid counterfeit units.

Selection Notes

Select this regulator when designing systems requiring high power density up to 100W with flexible topology options. It is suitable for applications needing wide input voltage ranges from 3V to 60V. Consider the thermal performance of the DDPAK package for heat dissipation needs. Choose this component if synchronous rectification is not required but high efficiency is critical. Evaluate the 100kHz switching frequency against EMI constraints in your design.

Part Context

The LT1171 series belongs to Analog Devices' family of monolithic high-power switching regulators. It shares architectural similarities with the LT1170, which offers higher current capabilities. Both devices support identical switching configurations and integrate comprehensive control circuitry. The LT1171 specifically targets applications requiring up to 2.5A output current, distinguishing it from higher-current variants in the same product line.

Replacement Considerations

LT1171IQ#PBF serves as a direct substitute within the same package and current rating family.