National Semiconductor Intros LP5900 LDO Regulator

National Semiconductor Corp. (Santa Clara, CA) introduced its LP5900 miniature CMOS linear regulator that conducts low output and features high-power supply ripple rejection, while consuming 25 µA of quiescent current. The LP5900 is a 100 mA, low drop-out (LDO), linear regulator optimized for powering analog and RF signal-path integrated circuits, including low-noise amplifiers, voltage-controlled oscillators, and RF receivers.

The LP5900 linear regulator emits 6.5 µV(rms) of noise and features a high-power supply rejection ratio of 75 dB without the use of a bypass capacitor. It is available in a tiny, four-bump, micro SMD package that measures 1.1 mm x 1.1 mm. Its small form factor, combined with two 0.47 µF ceramic chip capacitors, optimizes board space and reduces a the bill of materials.

Available now, the LP5900 linear regulator is priced at $0.55 in 1,000-unit quantities.