LTC1474IS8-3.3#PBF

Voltage Regulators - DC DC Switching Regulators Overview

The LTC1474IS8-3.3#PBF is a high-efficiency step-down (buck) DC/DC converter manufactured by Analog Devices Inc., housed in an SOIC-8 surface-mount package. It provides a fixed 3.3 V output with a maximum current capacity of 300 mA, operating from an input voltage range of 3 V to 18 V. The device features a typical quiescent supply current of 10 µA and utilizes Burst Mode operation for enhanced light-load efficiency. It operates at a switching frequency of 400 kHz and supports logic-controlled shutdown. The industrial temperature range spans from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates an internal P-channel power MOSFET switch to minimize external component count.
• Employs Burst Mode operation to maintain high efficiency across wide load variations.
• Supports 100% duty cycle operation for low dropout performance under heavy loads.

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered portable electronic devices requiring extended runtime.
• Moderate current applications up to 300 mA with strict power constraints.
• Systems utilizing single-cell lithium-ion or alkaline battery supplies.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm availability status as distribution channels may list limited stock or obsolete status. Ensure the SOIC-8 package dimensions match your PCB footprint requirements. Cross-reference the manufacturer's latest datasheet for any pinout revisions or handling instructions relevant to this specific batch code.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact buck solution with integrated switches is required for moderate current loads. It is suitable for designs prioritizing low quiescent current over high output power. Consider the 400 kHz switching frequency for inductor size trade-offs. Verify that the 3.3 V fixed output meets system voltage requirements without needing external feedback resistors.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LTC1474/LTC1475 series of low quiescent current step-down converters. The 'I' suffix denotes the industrial temperature grade (-40°C to +85°C), distinguishing it from commercial variants. The 'S8' indicates the SOIC-8 package type. This series is designed to replace linear regulators in battery applications to significantly extend operational life through higher conversion efficiency.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LTC1474CS8-3.3#PBF serves as a direct functional substitute with identical electrical specifications but a commercial temperature range (0°C to +70°C). Verify thermal management requirements if the application exceeds the commercial grade limits. No other cross-model replacements are confirmed in the provided documentation.