ATDC1934

Overview

The ATDC1934 is a current mode PWM step-down DC/DC converter manufactured by Analog Technologies. It features an integrated 0.9A internal power MOSFET and supports a wide input voltage range from 5V to 42V. The device provides a single positive adjustable output starting at 0.8V, capable of delivering up to 700mA of continuous output current. It is housed in a compact SOT-23-6 package, designed for high-efficiency, high-frequency operation in space-constrained applications.

Feature Summary

• Integrates a 0.9A internal power MOSFET for efficient step-down conversion
• Supports wide input voltage range from 5V to 42V
• Provides adjustable positive output voltage with up to 700mA load capability
• Utilizes current mode PWM control architecture

Applications

• Battery-powered portable electronics requiring efficient voltage regulation
• Industrial systems utilizing unregulated wall transformers or lead-acid batteries
• Space-constrained embedded designs needing high-frequency switching regulators

Procurement Notes

Verify the manufacturer designation carefully, as Analog Technologies is distinct from Analog Devices (Linear Technology). Confirm that the specific part number ATDC1934 matches your design requirements, noting it is a third-party component rather than an original Linear LT1934. Ensure compatibility with your PCB footprint and thermal management strategy before procurement.

Selection Notes

Select this component when a wide input voltage range up to 42V is required alongside moderate output current capabilities. The SOT-23-6 package makes it suitable for applications where board space is limited. Consider the 700mA output limit and ensure it meets the peak load demands of the target circuit without exceeding the internal MOSFET ratings.

Part Context

This component belongs to the category of micropower step-down switching regulators. While similar in function to the industry-standard LT1934 series from Analog Devices, the ATDC1934 is produced by Analog Technologies. It serves as a alternative solution for designers seeking a compact, high-efficiency buck converter with comparable electrical characteristics but potentially different sourcing channels.

Replacement Considerations

The LT1934EDCB-1 from Analog Devices is a functional equivalent offering similar step-down regulation in a DFN-6 package. Designers should verify pinout compatibility and thermal performance differences between the SOT-23-6 and DFN packages when substituting.