Fixed 2.85 V rail for always-on, low-power loads
The Texas Instruments TPS797285DCKT is a single-output linear regulator delivering a fixed 2.85 V at up to 50 mA from a maximum input of 5.5 V. Its 2 µA quiescent current makes it a fit for battery-backed or always-on domains — think a sensor bias rail, a small MCU core, or a keep-alive supply on an industrial control board where every microamp is budgeted. The fixed output eliminates the feedback divider, saving two resistors and a noise-injection path. Output noise rejection is rated at 50 dB at 100 Hz, which is modest for an LDO — enough to clean up ripple from a rectified mains or a switching pre-regulator, but not enough for a sensitive analog front-end without additional filtering. The part includes over-current and reverse polarity protection, practical for field-wired modules where a supply reversal is possible.
Package and rework — SC-70-5
Housed in a 5-pin SC-70-5 (SOT-353), this is a small surface-mount package. Hand rework is possible with a fine-tip iron or hot air, but the pad layout needs to be clean — the part is light and can shift during reflow if paste volume is uneven. Pin 1 orientation is marked by a bevel on the top surface; verify the footprint against the supplier package drawing before the board goes out.
Lifecycle and sourcing
Marked as active and ROHS3 compliant.