LD49300PT08R

Overview

The LD49300PT08R is a 3 A very low-dropout voltage regulator manufactured by STMicroelectronics. It features an input voltage range of 1.4 V to 5.5 V and requires a bias supply between 3 V and 6 V. The device provides a fixed output voltage of 0.8 V with ±1.5% initial tolerance. Maximum dropout voltage is 400 mV over the operating temperature range. It operates within a junction temperature range of -25 °C to +125 °C and utilizes a PPAK package.

Feature Summary

• Dual supply configuration for ultra-low input voltages on the main rail
• Very fast transient response up to 10 MHz bandwidth
• Logic-controlled shutdown option for power management
• Integrated thermal shutdown and current limit protection

Applications

• Graphics processors
• PC add-in cards
• Microprocessor core voltage supply
• Low voltage digital ICs
• SMPS post regulators

Procurement Notes

Verify the specific ordering code LD49300PT08R against official STMicroelectronics documentation to confirm it represents the adjustable version or fixed 0.8 V variant as indicated in datasheet tables. Ensure compatibility with the required PPAK tape and reel packaging specifications before procurement.

Selection Notes

Select this component when powering low-power microprocessors requiring high bandwidth and fast transient response. The dual supply architecture allows operation from ultra-low input voltages, making it suitable for applications where minimizing dropout voltage is critical for efficiency.

Part Context

This part belongs to the LD49300 series of 3 A very low-dropout voltage regulators. It is designed for high-current applications needing excellent line and load regulation. The series supports both fixed and adjustable output configurations within the same family structure.

Replacement Considerations

LD49300PT10R and LD49300PT12R are confirmed substitutes within the same series offering different fixed output voltages.