LTC1147HVCS8-3.3#PBF

DC DC Switching Controllers Overview

The LTC1147HVCS8-3.3#PBF is a high-voltage step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of up to 16 V and provides a fixed 3.3 V output. The device supports an output current of 700 mA with a switching frequency of 400 kHz. Key electrical parameters include a quiescent current of 160 uA, a load regulation of 40 mV, and a maximum duty cycle of 100%. It functions in an industrial temperature range from 0°C to +70°C and is housed in an 8-pin SOIC package.

DC DC Switching Controllers Feature Summary

• Features automatic Burst Mode operation to maintain high efficiency at low output currents
• Utilizes a constant on-time current mode architecture for stable control
• Capable of driving external P-channel MOSFETs for synchronous rectification
• Supports 100% duty cycle operation for minimal dropout voltage

DC DC Switching Controllers Applications

• Battery-powered portable equipment requiring high efficiency
• Industrial control systems with variable input voltages
• General-purpose step-down DC-DC power supplies
• Embedded systems needing regulated 3.3 V logic rails

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape and reel or tube packaging as per the manufacturer's latest documentation. Confirm RoHS compliance status directly with Analog Devices Inc. due to potential supply chain variations. Ensure the ordering part number matches the exact voltage and package variant required for your design. Cross-reference with authorized distributors for current availability and authenticity guarantees.

DC DC Switching Controllers Selection Notes

Select this component when a high-voltage input capability up to 16 V is required alongside efficient buck conversion. The fixed 3.3 V output simplifies design for standard logic levels. Consider the 400 kHz switching frequency for balancing component size and efficiency. The 8-pin SOIC package offers a compact footprint suitable for space-constrained PCB layouts. Evaluate thermal performance based on the expected load current and ambient conditions.

DC DC Switching Controllers Part Context

This part belongs to the LTC1147 series of high-efficiency buck switching regulator controllers. The series includes variants with different output voltages and package options, such as the CS8 and IS8 suffixes indicating commercial and industrial temperature ranges respectively. The HV designation specifically denotes the higher input voltage tolerance compared to standard versions. These controllers are designed for applications demanding reliable power management in compact form factors.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other parts within the LTC1147 family, such as the LTC1147CS8-3.3#PBF for commercial temperature range applications. Verify pin compatibility and electrical specifications before substitution. Alternative manufacturers may offer similar buck controllers, but functional equivalence must be confirmed against the original datasheet requirements.