LT8618EDDB#WTRPBF

Overview

The LT8618EDDB#WTRPBF is a synchronous step-down DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 3.4V to 60V and provides a single adjustable output from 778mV to 25V at up to 100mA. The device features a wide switching frequency range of 200kHz to 2.2MHz and ultra-low quiescent current of 1.7µA. It is housed in a compact 10-WFDFN package with exposed pad, suitable for surface mount installation across temperatures from -40°C to +125°C.

Feature Summary

• Synchronous buck topology designed for high efficiency in space-constrained applications
• Wide input voltage capability supporting direct connection to 48V industrial buses
• Ultra-low no-load supply current enables extended battery life in portable devices
• Integrated power switches eliminate external component requirements for basic operation

Applications

• Battery-powered instrumentation and handheld devices
• Industrial control systems requiring isolated or non-isolated low-power rails
• Point-of-load regulation for digital signal processors and microcontrollers
• Telecommunications equipment auxiliary power supplies

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm packaging configuration. The #WTRPBF designation indicates tape and reel packaging; ensure compatibility with automated assembly equipment. Confirm RoHS compliance status through the manufacturer's latest material declaration. Cross-reference the full part number with authorized distributors to validate authenticity and traceability before procurement.

Selection Notes

Select this component when input voltages exceed standard regulator limits but output currents remain below 100mA. The adjustable output allows flexibility for various logic families. Consider thermal performance in dense PCB layouts due to the small DFN footprint. Verify that the required switching frequency falls within the specified 200kHz to 2.2MHz range for optimal inductor selection.

Part Context

This part belongs to the LT8618 family of high-voltage synchronous buck converters. It shares core architecture with variants offering different packaging or fixed output voltages. The series targets applications needing robust performance from high-input sources while maintaining minimal standby consumption. Other members may differ in pinout compatibility or thermal characteristics.

Replacement Considerations

LT8618EDDB#TRMPBF serves as a compatible alternative with identical electrical specifications but differs in shipping packaging format. Ensure mechanical fitment matches the target PCB footprint when substituting between reel and cut-tape versions.

FAQ

What is the minimum input voltage required for proper operation?

The device requires a minimum input voltage of 3.4V to maintain regulation and functionality.

Can the output voltage be set lower than 1V?

Yes, the output is adjustable down to 778mV, allowing operation below the 1V threshold.

Is shutdown functionality available?

The datasheet does not explicitly list a dedicated shutdown pin for the LT8618EDDB variant; verify specific pinout details in the official document.