LT1305CS8#PBF

Overview

The LT1305CS8#PBF is a micropower step-up DC/DC converter manufactured by Analog Devices Inc., housed in an SOIC-8 surface-mount package. It operates with an input voltage range of 1.8 V to 4.5 V and provides a fixed 5 V output at up to 400 mA. The device utilizes Burst Mode operation for high efficiency at light loads and features a 2 A internal low-loss switch. Key electrical parameters include a switching frequency of approximately 300 kHz, a maximum quiescent current of 120 uA, and an operating temperature range from 0°C to +70°C.

Feature Summary

• Integrates a 2 A internal low-loss power switch capable of delivering significantly higher output power compared to the LT1303 series.
• Employs Burst Mode operation to maintain high conversion efficiency across varying load conditions.
• Includes a dedicated low-battery detect function for monitoring source voltage levels.

Applications

• Powering portable devices requiring conversion from two or three cell batteries to 5 V.
• Battery-powered instrumentation systems needing efficient step-up regulation.
• Applications utilizing a reference output configuration for system monitoring.

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm RoHS compliance status and specific manufacturing lot details against the official datasheet specifications. Ensure the SOIC-8 package variant matches design requirements. Request relevant certification documents directly from the supplier to validate supply chain integrity before procurement.

Selection Notes

Select this component when designing circuits that require higher output current capabilities than the LT1303 series while maintaining micropower efficiency. The fixed 5 V output suits standard logic interfaces. Consider the 1.8 V minimum input voltage for single-cell lithium applications. Verify thermal management needs given the 2 A switch capability within the compact SOIC-8 footprint.

Part Context

This part belongs to the LT1303/LT1304/LT1305 family of micropower high-efficiency DC/DC converters. While sharing similar control architectures and low quiescent current characteristics, the LT1305 distinguishes itself with a robust 2 A internal switch, enabling it to deliver up to four times the output power of the LT1303. It serves as a higher-power alternative within the same low-voltage boost converter portfolio.

Replacement Considerations

LT1303CS8#PBF offers lower current capacity (200 mA) but shares similar input ranges and packaging. LT1304CS8-5#PBF provides similar functionality with a slightly wider input voltage range (1.5 V to 8 V). Verify pinout compatibility and thermal performance when substituting these variants.