LD3980PU08R

Overview

The LD3980PU08R is a fixed-output low-dropout linear regulator manufactured by STMicroelectronics, providing a regulated 0.8V output with a maximum continuous load current of 300mA. It operates within an input voltage range of 1.7V to 3.6V and features an ultra-low dropout voltage of 130mV typ at full load. The device incorporates logic-controlled electronic shutdown, reducing quiescent current to below 0.5µA in OFF mode. It includes internal short-circuit constant current limiting and thermal overload protection, ensuring safe operation under fault conditions.

Feature Summary

• Ultra-low dropout voltage capability for efficient power management in battery-powered systems
• Logic-controlled electronic shutdown function for standby power reduction
• Compatible with low-ESR ceramic output capacitors as small as 1µF
• Integrated short-circuit current limiting and thermal overload protection

Applications

• Mobile phones
• Personal digital assistants (PDAs)
• Cordless phones
• Portable information appliances

Procurement Notes

Verify the specific package type and suffix against official datasheets before procurement. Confirm that the component meets required environmental standards such as RoHS compliance. Ensure the supply chain source provides valid traceability documentation. Check for any obsolescence notices or lifecycle status updates from the manufacturer prior to finalizing orders.

Selection Notes

Select this component when designing low-power circuits requiring a stable 0.8V rail from a single-cell lithium-ion or similar battery source. The LD3980PU08R is suitable for applications where minimizing voltage drop across the regulator is critical for extending battery life. Consider its compatibility with ceramic capacitors for space-constrained designs.

Part Context

The LD3980 series consists of low-dropout, low-quiescent-current linear regulators designed primarily for battery-powered applications. This family supplies regulated output voltages for load currents up to 300mA. The devices feature precision bandgap references and error amplifiers to maintain high accuracy across varying temperature ranges and load conditions.

Replacement Considerations

LD3980PM08R