LD29080PT90R

Overview

The LD29080PT90R is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 9 V output with a maximum load current of 800 mA. The device operates within an input voltage range of 2.5 V to 13 V and features a typical dropout voltage of 400 mV at full load. Output accuracy is specified at ±1% at 25 °C, with line regulation of 0.5% and load regulation of 1%. It utilizes a PPAK surface-mount package with five pins and supports an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Guarantees up to 800 mA output current capability for medium-current applications
• Features very low dropout voltage and extremely low ground current consumption
• Includes internal protection mechanisms against overcurrent and thermal overload

Applications

• Post-regulation stages in switching power supplies
• Series power supply units for monitors and televisions
• Battery-powered electronic systems requiring stable voltage rails

Procurement Notes

Verify the specific suffix 'PT90R' against the manufacturer's official datasheet to confirm the 9 V fixed output configuration and PPAK-5 package type. Ensure compatibility with PCB footprint requirements for the PPAK housing. Confirm that the intended application does not exceed the 13 V maximum input voltage or the 125 °C junction temperature limits defined in the technical specifications.

Selection Notes

Select this component when a fixed 9 V rail is required with high current capacity up to 800 mA. The PPAK package offers efficient thermal dissipation compared to smaller SOT packages. Consider the 400 mV dropout characteristic to ensure sufficient input-to-output differential under all load conditions. Verify that the system design accommodates the specific pinout and thermal pad requirements of the PPAK-5 housing.

Part Context

This part belongs to the LD29080 series of medium-current, high-accuracy low-dropout regulators. The series is designed for applications demanding tight voltage tolerance and low quiescent current. The PT90R variant specifically denotes the 9 V fixed output version housed in the PPAK surface-mount package, distinguishing it from other voltage options and TO-252/DPAK variants within the same family.

Replacement Considerations

Cross-reference with other LD29080xxPTxxR parts for different fixed voltages if the 9 V requirement changes. Verify pinout compatibility with DPAK (TO-252) versions if package migration is necessary, noting potential differences in thermal performance and mounting requirements.