LTC3405AES6-1.375#TRPBF

Voltage Regulators - DC DC Switching Regulators Overview

The LTC3405AES6-1.375#TRPBF is a micropower synchronous step-down DC/DC converter manufactured by Analog Devices Inc., designed for battery-powered applications. It operates with an input voltage range of 2.5V to 5.5V and provides a fixed output voltage of 1.375V at up to 300mA load current. The device utilizes a constant-frequency, current-mode architecture with a switching frequency of 1.5MHz. Key electrical specifications include a typical quiescent supply current of 25µA in Burst Mode operation and less than 1µA in shutdown mode. It is housed in a compact SOT-23-6 (ThinSOT) package suitable for space-constrained designs.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification to maximize efficiency while minimizing external component count
• Features Burst Mode operation for ultra-low quiescent current during light-load conditions
• Utilizes a compact ThinSOT package to reduce solution footprint and allow smaller inductors

Voltage Regulators - DC DC Switching Regulators Applications

• Portable handheld devices requiring efficient power management from single-cell lithium-ion batteries
• Battery-operated instrumentation and measurement equipment
• Wireless communication modules and sensor nodes
• General-purpose low-voltage digital logic power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm that the AES6 designation corresponds to the extended industrial temperature range (-40°C to +85°C). Ensure compatibility with standard surface-mount assembly processes for the SOT-23-6 package. Cross-reference the manufacturer's latest datasheet for any updates on material declarations or compliance status prior to final procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.375V output is required without external feedback resistors. It is appropriate for designs prioritizing small physical size due to the ThinSOT package. Consider the 1.5MHz switching frequency for trade-offs between inductor size and electromagnetic interference. Verify that the 300mA maximum output current meets the peak load requirements of the target application circuit.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LTC3405 family of micropower synchronous buck regulators. The family includes variants with different fixed output voltages and adjustable versions. The LTC3405 series is characterized by high efficiency across a wide load range and low standby current, making it suitable for extending battery life in portable electronics compared to linear regulators.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct functional substitutes within the same package may include other LTC3405 variants with different fixed output voltages if the voltage requirement can be adjusted via external components, though the -1.375 suffix denotes a fixed internal setting. Check for newer generation replacements in the LTC340x series if improved thermal performance or higher current capability is needed.