LTC1435ACS#PBF

DC DC Switching Controllers Overview

The LTC1435ACS#PBF is a high-efficiency, low-noise synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It utilizes a fixed-frequency architecture to drive external N-channel power MOSFETs. The device operates with an input voltage range of 3.5 V to 36 V and provides an adjustable output voltage from 1.19 V to 9 V. Key electrical parameters include a maximum output current capability determined by external components, a switching frequency of 125 kHz, and a quiescent operating current of 260 µA. It features a minimum on-time of ≤300 ns, enabling operation at high frequencies with low duty cycles. The unit supports shutdown functionality and maintains a load regulation of 0.5%. It is housed in a 16-lead SOIC package.

DC DC Switching Controllers Feature Summary

• Synchronous step-down switching regulator controller designed for high efficiency and low noise applications
• Fixed-frequency architecture driving external N-channel power MOSFETs
• Capable of very low dropout operation with up to 99% duty cycle
• Includes programmable fixed frequency and shutdown control

DC DC Switching Controllers Applications

• Battery-powered systems requiring efficient voltage regulation
• Industrial equipment with wide input voltage ranges
• Telecommunications infrastructure power supplies
• Portable instrumentation and measurement devices

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the package type is 16-SOIC and ensure the operating temperature range meets system requirements of 0°C to +70°C. Cross-reference the manufacturer part number with official Analog Devices databases to confirm availability and lifecycle status before procurement.

DC DC Switching Controllers Selection Notes

Select this component when a synchronous buck controller is required for applications demanding high efficiency and low output noise. It is suitable for designs needing a wide input voltage range up to 36 V. Ensure external MOSFETs are selected to handle the required load current and that the PCB layout supports the 125 kHz switching frequency. Consider the 16-SOIC package constraints for thermal management and board space.

DC DC Switching Controllers Part Context

The LTC1435ACS#PBF belongs to the LTC1435 family of synchronous step-down switching regulators. This series is characterized by its ability to drive external N-channel MOSFETs for improved efficiency compared to integrated solutions. The ACS variant specifically denotes the commercial temperature grade and SOIC packaging, distinguishing it from other package options or extended temperature variants within the same functional family.

DC DC Switching Controllers Replacement Considerations

The LTC1435A is the broader family designation; verify if the specific #PBF suffix and SOIC package are required. Check for direct pin-compatible alternatives from Analog Devices such as the LTC1435CS#PBF, ensuring voltage ranges and package types match. External MOSFET selection remains critical regardless of the controller replacement.