Low Dropout Linear Regulators

( 1 Jan 2006 )

Texas Instruments has a series of 200 mA LDOs in a 1.5 x 1 mm chip scale package. The low-noise LDOs meet the power management requirements of 3G handsets that feature noise-sensitive Bluetooth, RF and high-resolution camera circuitry. The TPS799xx LDOs deliver 29.6 µV(RMS) of output noise and provide a power supply rejection ratio (PSRR) of 66 dB at 1 kHz to minimize noise that occurs when power is regulated to a handset’s most noise-sensitive circuits. The devices also offer a startup time of 45 µs and good transient response while consuming 40 µA (typical) of supply current. The TPS799xx family is stable with a small, 2.2 µF ceramic capacitor and can yield dropout voltages as low as 100 mV at 200 mA over the entire range of input voltages, allowing it to support demanding power requirements of 3G handsets
and WLAN cards.

Texas Instruments Inc.