LT8643SIV#PBF

Overview

The LT8643SIV#PBF is a synchronous step-down Silent Switcher 2 regulator from Analog Devices. It supports an input voltage range of 3.4 V to 42 V and delivers up to 6 A output current. The device features adjustable output voltage starting at 0.97 V with one output channel. Operating parameters include a switch frequency range of 200 kHz to 3 MHz and a quiescent current of 750 nA. It operates within a temperature range of -40°C to +125°C and utilizes a 24-lead LQFN package.

Feature Summary

• Integrates Silent Switcher 2 architecture for minimized electromagnetic interference without external filters
• Provides high efficiency through synchronous rectification design
• Supports external compensation for flexible loop stability control
• Includes integrated shutdown functionality for power management

Applications

• Automotive infotainment systems
• Industrial equipment power distribution
• Telecommunications infrastructure
• Point-of-load regulation in compact modules

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout and thermal pad configuration. Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Check for moisture sensitivity level requirements during storage and handling. Ensure the ordering part number matches the exact package variant required for your PCB layout.

Selection Notes

Select this component when a wide input voltage range up to 42 V is required alongside high continuous current capability. The Silent Switcher 2 technology is suitable for applications with strict EMI constraints where external shielding is difficult. External compensation allows customization of transient response characteristics. Verify that the 24-LQFN package fits within the available board space and thermal design limits.

Part Context

This part belongs to the LT8643S family, which includes variants like LT8643SEV#PBF. These devices are designed as monolithic buck converters offering high performance in small footprints. The series targets applications requiring robust power conversion in automotive and industrial environments.

Replacement Considerations

LT8643SEV-2#PBF and LT8643SHV-2#PBF are listed as parameter equivalents.