LTC3863IDE#PBF

DC DC Switching Controllers Overview

The LTC3863IDE#PBF is a negative output DC/DC PMOS controller designed for automotive and industrial applications. It drives a P-channel power MOSFET to generate a negative output using a single inductor, supporting output voltages from -0.4V to -150V. The device features a wide input voltage range of 3.5V to 60V and operates with a quiescent current of 70μA. Switching frequency is programmable from 50kHz to 850kHz via an external resistor and can be synchronized to an external clock between 75kHz and 750kHz. It utilizes peak current mode control with constant frequency PWM architecture.

DC DC Switching Controllers Feature Summary

• Generates negative output by driving a P-channel power MOSFET with a single inductor
• Supports high-voltage operation up to -150V output with low quiescent current
• Features peak current mode architecture with programmable soft start or output tracking
• Includes comprehensive protection against overvoltage, overcurrent, and short circuits

DC DC Switching Controllers Applications

• Industrial and automotive power supplies
• Telecommunications power systems
• Distributed power architectures

DC DC Switching Controllers Procurement Notes

Verify the specific package variant when ordering, as the base model supports both DFN-12 and MSOP-EP packages. Confirm RoHS compliance status through official documentation. Ensure the selected part number matches the required thermal performance and pinout configuration for the target PCB layout. Cross-reference the datasheet for any recent manufacturing changes or packaging updates.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring a compact negative rail generation solution. The single-inductor topology reduces component count compared to traditional inverting converters. Consider the 70μA quiescent current for light-load efficiency requirements. Evaluate the 50kHz to 850kHz frequency range against EMI constraints and inductor size limitations. Verify that the external P-channel MOSFET ratings exceed the maximum input and output voltage specifications.

DC DC Switching Controllers Part Context

This part belongs to the LTC3863 family of negative output controllers. It is functionally similar to other models in the series but differs in package type. The IDE suffix indicates a DFN-12 package, while other variants like EMSE use MSOP-EP. All members share the same core control logic and electrical characteristics.

DC DC Switching Controllers Replacement Considerations

LTC3863EMSE#PBF (MSOP-EP package)

DC DC Switching Controllers FAQ

Can the switching frequency be synchronized to an external clock?

Yes, the switching frequency can be synchronized to an external clock signal ranging from 75kHz to 750kHz.

What protection features are included in the controller?

The device includes overvoltage, overcurrent, and short-circuit protection with frequency foldback capabilities.