PSRR and quiescent current — noise rejection vs battery life
The LP8900TLX-AAAH/NOPB: PSRR starts at 75 dB at 1 kHz and rolls off to 30 dB at 1 MHz. That 75 dB at audio frequencies means the LDO attenuates switching-regulator ripple by a factor of ~5600 — useful for powering an audio codec or ADC reference from a noisy bus. The 30 dB at 1 MHz still knocks down high-frequency hash by a factor of ~32. Quiescent current is 120 µA typical, with a maximum supply current of 200 µA. For a battery-powered sensor logging once a minute, the LDO's own draw is roughly 0.3% of a 2000 mAh cell per year — negligible in most portable designs.
Package and temperature range
Housed in a 6-bump DSBGA measuring 1.5 x 1.3 mm, the LP8900TLX-AAAH/NOPB is a tiny footprint for space-constrained PCBs — think wearables, IoT modules, or compact sensor nodes. The surface-mount package requires a hot-air or reflow station for rework; not a field-swap part without the right gear. Protection features include over-temperature shutdown and short-circuit current limiting, so it survives a momentary output short without damage.