PT5108X

PT5108X High-PSRR 500mA LDO GENERAL DESCRIPTION The PT5108 is a low-dropout voltage regulator designed for portable applications that require both low noise performance and board space. Its PSRR at 1kHz is better than 70dB. The PT5108’s performance is ideal for battery powered systems for delivering low dropout voltage and low quiescent current. An optional external bypass capacitor reduces the output noise and increases PSRR. The device can be used for mobile phone and similar battery powered wireless applications. It provides up to 500mA, from a 2.5V to 5.5V input. The PT5108 consumes less than 0.1µA in shutdown mode and has fast turn-on time less than 150µs. The PT5108 is available in 5 pin SOT-23 package (Pd free). Selected performances are specified for −40°C to +85°C temperature range. The output voltage is available in the range of 1.5V to 5.0V. FEATURES „ „ „ „ „ „ „ „ 2.5V to 5.5V input range 72dB PSRR @1kHz, Vin = Vout + 1V < 1uA quiescent current at shutdown mode Fast turn on time: 150us (typical) 290mV maximum dropout voltage with 400mA load Thermal shutdown and short-circuit current limit 1.5, 1.8, 2.0, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V, 3.2V, 3.3V, 4.7V, 4.8V, 4.9V and 5.0V output standard Miniature SOT-23-5 package (Pd free) APPLICATIONS „ „ „ „ „ CDMA/GSM mobile phone Handless telephone WLAN and Bluetooth appliances PDAS/MP3 handsets Battery powered portable devices TYPICAL APPLICATIONS Ripple Rejection vs Frequency VIN V IN V OUT VOUT -30 -...