LTC1147CN8-5#PBF

Overview

The LTC1147CN8-5#PBF is a high-efficiency step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 3.5 V to 16 V and provides a fixed 5 V output with a maximum current capacity of 700 mA. The device features a switching frequency of 400 kHz and a quiescent current of 160 uA. It utilizes a Buck topology and includes shutdown functionality. The component is housed in an 8-PDIP package, supports through-hole mounting, and functions within a temperature range of 0°C to +70°C.

Feature Summary

• Features automatic Burst Mode operation to maintain high efficiency at low output currents
• Includes internal error amplifier for precise voltage regulation
• Supports external synchronization to the clock signal
• Provides cycle-by-cycle current limit protection

Applications

• Battery-powered portable equipment
• Industrial control systems
• Telecommunications infrastructure
• Consumer electronics power supplies

Procurement Notes

Verify the specific suffix #PBF confirms lead-free compliance and RoHS status before procurement. Confirm the PDIP-8 package dimensions match your PCB footprint requirements. Ensure the fixed 5V output aligns with system design needs as no adjustable variants exist in this specific part number. Check manufacturer documentation for any recent PCN updates regarding packaging or material changes.

Selection Notes

Select this component when a fixed 5V output is required from a 3.5V to 16V input source. It is suitable for designs prioritizing efficiency at light loads due to Burst Mode capability. Consider the 400kHz switching frequency for inductor size trade-offs. The PDIP-8 package is appropriate for prototyping or applications requiring through-hole assembly rather than surface mount constraints.

Part Context

This part belongs to the LTC1147 series of high-efficiency buck regulators. It shares architectural similarities with other members like the LTC1147-3.3 but differs in fixed output voltage. The series is designed for applications requiring simple implementation with minimal external components while maintaining performance across varying load conditions.

Replacement Considerations

Direct pin-compatible substitutes may include other Analog Devices buck controllers with similar input ranges and fixed outputs, such as the LTC1147CN8-3.3#PBF if a different voltage is acceptable. Verify electrical parameters and package compatibility before substitution.