LTC1439CG#PBF

DC DC Switching Controllers Overview

The LTC1439CG#PBF is a dual synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 3.5 V to 30 V and supports output voltages from 1.19 V to 9 V. The device features a fixed switching frequency of 125 kHz with a maximum duty cycle of 99%. It delivers up to 20 mA output current per channel and maintains a load regulation of 0.5%. Operating supply current is 320 uA, and it functions within a temperature range of 0°C to +70°C. The component is housed in a 36-SSOP package.

DC DC Switching Controllers Feature Summary

• Dual synchronous buck architecture driving external N-channel power MOSFETs
• Phase-lockable fixed frequency operation for synchronized multi-phase designs
• Integrated shutdown, power-on reset, and soft-start control features

DC DC Switching Controllers Applications

• Portable battery-powered equipment requiring efficient dual-rail power
• Industrial control systems needing isolated or separate logic and analog supplies
• Communication infrastructure utilizing phase-synchronized power stages

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF confirms lead-free compliance and RoHS status before procurement. Confirm the 36-SSOP package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Check for any recent lifecycle notices regarding obsolescence or last-time buy status directly from Analog Devices.

DC DC Switching Controllers Selection Notes

Select this controller when dual independent outputs are required from a single IC solution. It is suitable for applications where external MOSFET selection allows optimization for specific current and efficiency targets. Consider the 36-pin SSOP package constraints for board space. Verify that the 125 kHz frequency aligns with EMI requirements and inductor size preferences.

DC DC Switching Controllers Part Context

This component belongs to the LTC1438/LTC1439 family of high-efficiency, low-noise synchronous step-down regulators. These controllers are designed to drive external power switches, offering flexibility in output configuration compared to integrated monolithic regulators. The family emphasizes performance in portable and industrial applications requiring precise voltage regulation.

DC DC Switching Controllers Replacement Considerations

LTC1439CG#PBF is the direct lead-free replacement for the non-PBF variant LTC1439CG.