LT1303IS8

Overview

The LT1303IS8 is a micropower step-up DC/DC converter manufactured by Analog Devices, housed in an 8-lead SOIC package. It operates from an input voltage range of 1.8V to 6V and delivers up to 700mA output current with adjustable output voltage capability reaching 25V. The device utilizes Burst Mode operation for high efficiency at light loads, maintaining a quiescent current of 120µA. A dedicated shutdown pin reduces standby current to 10µA. Integrated features include a low-battery detector with open-collector output and an on-chip NPN power switch with 170mV saturation voltage at 1A switch current.

Feature Summary

• Burst Mode operation ensures high efficiency across varying load conditions
• Integrated low-battery detector provides system status monitoring
• Shutdown pin enables deep sleep mode for extended battery life
• On-chip NPN power switch minimizes external component count

Applications

• Small low-voltage battery-operated systems
• Portable electronic devices requiring efficient step-up conversion
• Applications necessitating low-battery detection capabilities

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status as availability varies by region. Check manufacturer documentation for current lifecycle status, as some variants may be limited or discontinued. Ensure the SOIC-8 package dimensions match your PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component for designs requiring adjustable output voltages up to 25V from a single-cell battery source. Consider the LT1303CS8 variant if commercial temperature range suffices. For fixed 5V output requirements, evaluate the LT1303IS8-5#TR model instead. Verify that the 700mA peak current capability meets your maximum load demands without exceeding thermal limits in the chosen enclosure.

Part Context

This part belongs to the LT1303 family of micropower switching regulators designed for battery-powered applications. It complements higher-current counterparts like the LT1305 and LT1302. The IS8 designation specifies the industrial temperature range and SOIC-8 surface-mount package configuration within Analog Devices' portfolio of power management integrated circuits.

Replacement Considerations

Publicly confirmed substitutes include LT1303IS8-5#TR for fixed 5V output applications. Evaluate LT1305 or LT1302 models if higher output current capacity is required. Cross-reference LT1303CS8 series parts for identical functionality in commercial temperature ranges.