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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 800MA SOT-223
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：13V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：180 µA
- Current - Supply (Max)：35 mA
- PSRR：67dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223
- Grade：-
- Qualification：-
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Overview
The LD29080S33R is a fixed-output low-dropout linear voltage regulator from STMicroelectronics, providing a stable 3.3V output with a maximum guaranteed current of 800 mA. It operates within an input voltage range of 2.5V to 13V and features a typical dropout voltage of 400 mV at full load. The device maintains high accuracy with ±1% tolerance at 25°C and includes internal protections against overcurrent and thermal overload. Designed for surface-mount applications, it supports operation up to a maximum junction temperature of 125°C.
Feature Summary
- Guarantees 800 mA output current capability for medium-current loads
- Features ultra-low dropout voltage for efficient power management
- Includes logic-controlled electronic shutdown for system power saving
- Provides high output voltage accuracy with ±1% tolerance
Applications
- Power supply switching post-regulation
- Series power supplies for monitors and TVs
- Battery-powered systems requiring low dropout
- Computer systems and portable electronics
Procurement Notes
Verify the specific suffix 'S' in the part number LD29080S33R against official STMicroelectronics documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required PCB footprint and thermal dissipation requirements before procurement.
Selection Notes
Select this component when a fixed 3.3V rail is needed with up to 800 mA capacity and minimal voltage drop between input and output. Consider its low ground current and shutdown feature for battery efficiency. Verify that the input voltage remains within the 2.5V to 13V range under all operating conditions.
Part Context
This device belongs to the LD29080 series of medium-current, high-accuracy low-dropout regulators. It shares core architectural features with other members of the family, such as the LD29080DT33R, but may differ in packaging or reel configuration based on the specific ordering suffix provided by the manufacturer.
Replacement Considerations
Direct replacements include other LD29080 variants with compatible output voltages and current ratings. Verify pinout compatibility and thermal performance characteristics before substituting.
