Adjustable LDO in TO-263-3 — 800 mA rail for post-regulation
The LM1117SX-ADJ: It delivers up to 800 mA with a maximum dropout of 1.2 V at full load, making it a fit for post-regulated rails where the input-to-output headroom is at least 1.2 V under worst-case temperature.
PSRR is specified at 75 dB at 120 Hz, which is the full-wave-rectified line frequency. That level of rejection cleans up the bulk-capacitor ripple before it reaches an analog or mixed-signal load — useful when this regulator feeds the supply pin of an op-amp or ADC reference buffer.
Output voltage range and protection
Input voltage can go up to 15 V. On-chip protection includes over-current and over-temperature shutdown, so the regulator survives a sustained short on the output without immediate failure.
No official successor or direct replacement is listed on the record.