LT3009IDC-5#TRPBF

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LT3009IDC-5#TRPBF is a micropower, low dropout linear regulator from Analog Devices Inc. It provides a fixed 5V output with a maximum current of 20mA. The device features an ultralow quiescent current of 3µA and consumes less than 1µA in shutdown mode. It operates within an input voltage range of 1.6V to 20V and maintains stability with low ESR ceramic capacitors as small as 1µF. The component includes internal protection against current limiting, thermal overload, reverse-battery conditions, and reverse-current flow.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultralow standby power consumption with 3µA quiescent current and less than 1µA shutdown current
• Integrated protection circuitry including current limit, thermal limit, reverse-battery, and reverse-current protection
• Optimized for stability with low ESR ceramic output capacitors requiring only 1µF minimum capacitance

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Low current battery-powered systems
• Keep-alive power supplies
• Remote monitoring utility meters
• Hotel door locks

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging when sourcing. Confirm the 'I' grade designation ensures guaranteed performance across the full –40°C to 125°C operating junction temperature range. Ensure the lead-free finish matches RoHS compliance requirements for the target assembly process.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this part for applications requiring moderate 20mA drive capability combined with minimal standby power drain. The fixed 5V output eliminates the need for external resistor dividers used in adjustable versions. Verify that the input voltage remains within the 1.6V to 20V range and that the load transient requirements are met by appropriate output capacitance selection.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the LT3009 series of micropower LDO regulators. It shares core electrical characteristics with other variants in the family, such as different fixed output voltages or adjustable configurations. The IDC suffix indicates the 6-lead DFN package, while the ID variant specifies the industrial temperature grade.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LT3009IDC-5#PBF (Tube version)

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How does the LT3009 handle reverse battery connections?

The device incorporates reverse-battery protection that acts like a large resistor in series with the input during reversed polarity events, preventing reverse voltage from appearing at the load.

What is the minimum required output capacitor value?

A minimum output capacitor of 1µF with an ESR of 3Ω or less is required to prevent oscillations and ensure stability.