LT8640SIV#PBF

Overview

The LT8640SIV#PBF is a synchronous step-down switching regulator from the Silent Switcher 2 family, manufactured by Analog Devices Inc. It operates with an input voltage range of 3.4 V to 42 V and delivers up to 6 A of continuous output current. The device features an adjustable output voltage between 970 mV and 41.58 V. Its switching frequency is programmable from 200 kHz to 3 MHz. Quiescent current in Burst Mode operation is 2.5 µA. The component is housed in a 24-lead LQFN package rated for junction temperatures from -40°C to +125°C.

Feature Summary

• Silent Switcher 2 architecture utilizes internal split ground planes and integrated capacitors to minimize electromagnetic interference without external shielding.
• Burst Mode operation enables ultra-low quiescent current consumption, extending battery life in always-on systems.
• Programmable switching frequency allows synchronization to external clocks or adjustment to avoid noise-sensitive bands.
• Integrated high-efficiency power switches and control logic provide fast transient response and stable loop performance.

Applications

• Automotive infotainment and sensor power supplies
• Industrial point-of-load regulation
• Battery-powered equipment requiring low standby current
• General-purpose DC/DC conversion in compact designs

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout and thermal pad configuration. Ensure compatibility with required operating temperature ranges and input voltage specifications. Cross-reference datasheet revisions to validate electrical characteristics. Confirm RoHS compliance status through manufacturer declarations. Validate package dimensions against PCB footprint requirements prior to integration.

Selection Notes

Select this component when high efficiency at elevated switching frequencies is required alongside strict EMI constraints. The wide input voltage range supports direct connection to automotive batteries or industrial buses. Low quiescent current makes it suitable for energy-constrained applications. Evaluate thermal performance based on expected load currents and ambient conditions within the specified operating temperature range.

Part Context

This part belongs to the LT8640S series, which includes variants like LT8640SEV#PBF and LT8640SHV#PBF. These devices share core Silent Switcher 2 technology but differ in package types and thermal characteristics. The series is designed for applications demanding compact size and low noise. Analog Devices integrates advanced control loops to maintain stability across varying load conditions.

Replacement Considerations

LT8640SEV#PBF serves as a parameter-equivalent alternative within the same product family. Verify package compatibility and thermal performance differences before substitution. Ensure functional equivalence regarding switching frequency ranges and output current capabilities. Consult official substitution guides for detailed pin-to-pin mapping and electrical parameter comparisons.