LTC1438XCG#PBF

DC DC Switching Controllers Overview

The LTC1438XCG#PBF is a dual, high-efficiency, low-noise synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 3.5 V to 36 V and provides two adjustable output voltages from 1.19 V to 9 V. The device supports a maximum output current of 20 mA per channel with a fixed switching frequency of 125 kHz. It features a shutdown function, 0.5% load regulation, and a quiescent supply current of 320 uA. Designed for surface mount installation, it is housed in a 28-SSOP package and functions within a temperature range of 0°C to +70°C.

DC DC Switching Controllers Feature Summary

• Dual synchronous buck topology driving external N-channel MOSFETs
• Phase-lockable fixed frequency architecture
• Integrated shutdown control and low noise operation

DC DC Switching Controllers Applications

• Portable battery-powered equipment requiring dual voltage rails
• Industrial systems needing efficient step-down conversion
• Embedded applications utilizing the DC198B evaluation kit

DC DC Switching Controllers Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific XCG suffix matches design requirements, as it denotes automotive-grade qualification. Check current availability status, as Mouser indicates limited supply or special order conditions for this part number. Ensure RoHS compliance documentation aligns with project regulations before finalizing procurement.

DC DC Switching Controllers Selection Notes

Select this controller when dual isolated outputs are required from a single high-voltage source. The 125 kHz frequency offers a balance between efficiency and component size. Verify that external MOSFETs can handle the required current, as the IC drives rather than supplies the load directly. Consider the 28-SSOP package constraints for PCB layout and thermal management in dense designs.

DC DC Switching Controllers Part Context

This component belongs to the LTC1438 family of dual synchronous step-down controllers. It shares architectural similarities with the LTC1439 but differs in pin count and configuration. The series is designed for applications demanding high efficiency and low electromagnetic interference. It serves as a core power management element in systems requiring stable, regulated dual rails from varying input sources.

DC DC Switching Controllers Replacement Considerations

LTC1438IG-ADJ#PBF is a direct functional substitute within the same family. Both devices share identical control logic and pinout compatibility. Verify that the operating temperature range of the replacement meets the specific application environment requirements.