LM1117T in LM1117 / LD1117 LDO Family
The LM1117T series, primarily manufactured by Texas Instruments and STMicroelectronics (as the LD1117 series), represents a staple collection of low-dropout linear regulators (LDOs). Designed to provide a stable output current of up to 800mA, these components are essential for post-regulation of switching DC/DC converters and battery-powered logic circuits. They feature a low dropout voltage of typically 1.2V at full load, making them efficient choices for converting 5V rails to standard 3.3V or 2.5V logic levels.
Variants in This Sub-Family
Variants within the LM1117T sub-family are distinguished primarily by their output voltage settings and lead-free compliance. The 'T' suffix denotes the TO-220 power package. Fixed-voltage models like the LM1117T-3.3 provide a set output without external resistors, whereas the adjustable version (LM1117T-ADJ) requires a resistive divider to set voltages between 1.25V and 13.8V. NOPB variants indicate 'No Pb' for RoHS compliance.
