LTC1159IS-5#PBF

DC DC Switching Controllers Overview

The LTC1159IS-5#PBF is a high-efficiency synchronous step-down switching regulator controller manufactured by Analog Devices. It operates with an input voltage range of 4V to 40V and features a fixed switching frequency of 250kHz. The device provides a regulated 5V output and supports up to 1A output current in typical application configurations. It utilizes Burst Mode operation to maintain high efficiency at low load currents. The component is housed in a 16-SOIC surface-mount package and is designed for industrial operating temperatures ranging from -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Synchronous buck topology with integrated driver for external MOSFETs
• Automatic Burst Mode operation for enhanced light-load efficiency
• Wide input voltage range supporting 4V to 40V sources
• Fixed 250kHz switching frequency for optimized passive component size

DC DC Switching Controllers Applications

• High efficiency DC/DC conversion from 12V to -12V
• General purpose step-down voltage regulation
• Battery-powered systems requiring low quiescent current
• Industrial power supply modules

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS status against the manufacturer's latest documentation. Confirm the 16-SOIC package dimensions match your PCB footprint requirements. Check for obsolescence or lifecycle status updates as Linear Technology products may have varying availability. Ensure the 5V output variant matches your system design needs, as other voltage options exist within the LTC1159 family.

DC DC Switching Controllers Selection Notes

Select this controller when a synchronous buck solution is required for inputs between 4V and 40V. The 250kHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the Burst Mode feature if light-load efficiency is critical. Ensure external MOSFETs are selected to handle the required current and voltage stresses. Verify thermal performance within the specified -40°C to +85°C operating range.

DC DC Switching Controllers Part Context

The LTC1159 series comprises high-efficiency synchronous step-down switching regulator controllers. This family includes various output voltage options and package types, such as SSOP and SOIC. The IS-5 variant specifically denotes the 16-pin SOIC package with a 5V fixed output. These controllers are part of Analog Devices' PMIC portfolio, focusing on efficient power management for diverse applications.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other variants within the LTC1159 family, such as LTC1159IS (different output voltage) or LTC1159CG-5 (SSOP package). Cross-reference pinouts and electrical specifications carefully. No direct cross-brand replacements are confirmed in public data without detailed equivalence analysis.