LT1109ACS8-5#PBF

Overview

The LT1109ACS8-5#PBF is a micropower DC/DC converter manufactured by Analog Devices Inc. It operates as a boost topology switching voltage regulator within the LT1109A series. The device accepts an input voltage range of 2 V to 9 V and provides a fixed output voltage of 5 V with a maximum output current of 1 A. Key electrical specifications include a static current of 360 uA, a switching frequency of 120 kHz, and a shutdown feature. It is housed in an SOIC-8 surface mount package and functions over a temperature range of 0 C to +70 C.

Feature Summary

• Integrated micropower DC/DC converter designed for low quiescent current operation
• Built-in shutdown capability for power management efficiency
• Fixed 5 V output configuration suitable for standard logic levels

Applications

• Flash memory VPP generation
• Microprocessor DC/DC conversion
• PCMCIA Type I or Type II card in-card power supplies

Procurement Notes

Verify component authenticity through authorized Analog Devices channels due to limited supply status. Confirm RoHS compliance details and specific manufacturing lot codes against current datasheets. Ensure the SOIC-8 package variant matches design requirements. Check for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when a fixed 5 V boost output is required from a 2 V to 9 V input source. The 120 kHz switching frequency allows for compact external passive components. Consider the 360 uA static current for battery-powered applications requiring extended standby life. Verify that the 1 A output current meets load demands without exceeding thermal limits in the SOIC-8 package.

Part Context

This part belongs to the LT1109A series of micropower DC/DC converters. It is specifically categorized under PMIC - Power Management ICs and Switching Voltage Regulators. The device serves as a specialized solution for generating higher voltages from lower input sources, commonly utilized in portable electronics and memory systems where space and power efficiency are critical constraints.

Replacement Considerations

Consult official Analog Devices documentation for direct pin-compatible substitutes within the LT1109 family. Verify if variants with different output voltages or packaging options meet the specific application requirements. Cross-reference electrical parameters such as switching frequency and static current to ensure functional equivalence.