Regulator identity and key parametrics
The TLV1117-18CDCY is a single-output positive LDO from Texas Instruments, delivering a fixed 1.8 V at up to 800 mA continuous. Input voltage range extends to 15 V maximum, and the operating temperature span is 0°C to 125°C — this covers commercial and industrial ambient environments, though not the full automotive temperature band.
Package and board-fit for SOT-223-4
Supplied in a SOT-223-4 surface-mount package (also referenced as TO-261-4, TO-261AA). The exposed pad on the bottom side provides the primary thermal path — the PCB copper area under the pad sets the junction-to-ambient resistance, so the layout should dedicate a flooded copper island with vias to an internal plane. The fixed-output configuration means no external resistor divider is needed for the output voltage; the 1.8 V is set internally.
Protection features and compliance status
On-chip protection includes over-current and over-temperature shutdown.