LTC3642EDD-5#PBF

Voltage Regulators - DC DC Switching Regulators Overview

The LTC3642EDD-5#PBF is a synchronous step-down DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 4.5V to 45V and provides a fixed 5V output at up to 50mA. The device features a typical quiescent current of 12µA at no load, maintaining regulation while minimizing power consumption. It utilizes a compact 8-WFDFN package with exposed pad for surface mount installation. The component supports adjustable switching frequencies and includes peak current mode control with soft-start functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates internal high-side and synchronous power switches for high efficiency conversion
• Maintains output voltage regulation with ultra-low 12µA typical supply current at no load
• Features peak current mode control architecture with integrated soft-start capability

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered portable equipment requiring low standby current
• Industrial control systems operating from wide voltage rails
• Automotive electronics utilizing high-voltage bus architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm the EDD package variant matches the required thermal and footprint specifications for the target PCB layout. Ensure the fixed 5V output configuration aligns with downstream load requirements, as this specific part number does not support adjustable output voltages.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V rail is required from inputs ranging up to 45V. The 50mA output limit suits low-power logic or sensor biasing rather than high-current loads. Consider the 8-DFN package for space-constrained designs where thermal dissipation remains manageable within the specified junction temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LTC3642 family of high-efficiency, high-voltage buck converters. The series is designed for applications demanding small solution size and low quiescent current. The EDD designation specifies the 8-lead DFN package, distinguishing it from other pinout or thermal variants within the same functional family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other parts in the LTC3642 family with compatible pinouts and electrical characteristics, such as the LTC3642IDD-5#PBF for identical performance in a different package variant.