LT1109ACS8-5#PBF

Overview

The LT1109ACS8-5#PBF is a micropower DC/DC converter manufactured by Analog Devices, housed in an SOIC-8 package. It operates as a boost topology switching voltage regulator with a fixed 5 V output and 1 A output current capability. The device accepts an input voltage range of 2 V to 9 V and features a shutdown function. Key electrical parameters include a 360 uA static current, a 120 kHz switching frequency, and operation within a temperature range of 0°C to +70°C.

Feature Summary

• Integrated flash memory VPP generator functionality for programming applications
• Micropower design optimized for battery-operated systems
• Built-in shutdown control feature for power management

Applications

• Flash memory VPP generation
• Battery-powered portable electronics
• General-purpose step-up DC/DC conversion

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm that the SOIC-8 package matches the target PCB footprint. Ensure the fixed 5 V output aligns with system requirements, as this variant does not offer adjustable voltage options.

Selection Notes

Select this component for applications requiring a compact boost converter with integrated flash programming capabilities. Consider the 1 A output limit and 120 kHz switching frequency for filter component sizing. Evaluate the 360 uA quiescent current against strict standby power constraints.

Part Context

This part belongs to the LT1109A series of micropower DC/DC converters. It is designed specifically for low-power applications where space and efficiency are critical. The series supports various output configurations, with this specific model providing a fixed 5 V rail suitable for standard logic levels.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.