ADP222

Data Sheet Dual, 300 mA Output, Low Noise, High PSRR Voltage Regulators ADP222/ADP223/ADP224/ADP225 09376-001 FEATURES Input voltage range: 2.5 V to 5.5 V Small, 8-lead, 2 mm × 2 mm LFCSP package Initial accuracy: ±1% High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz Low noise: 27 µV rms at VOUT = 1.2 V, 50 µV rms at VOUT = 2.8 V Excellent transient response Low dropout voltage: 170 mV at 300 mA load 65 µA typical ground current at no load, both LDOs enabled Fixed output voltage from 0.8 V to 3.3 V (ADP222/ADP224) Adjustable output voltage range from 0.5 V to 5.0 V (ADP223/ADP225) Quick output discharge (QOD)—ADP224/ADP225 Overcurrent and thermal protection APPLICATIONS Portable and battery-powered equipment Portable medical devices Post dc-to-dc regulation Point of sale terminals Credit card readers Automatic meter readers Wireless network equipment TYPICAL APPLICATION CIRCUITS VIN = 4.2V + C1 1µF R1 ON OFF ON OFF 1 EN1 ADJ1 8 ADP223/ ADP225 2 EN2 VOUT1 7 R2 VOUT1 = 2.0V + C2 1µF 3 GND VIN 6 4 ADJ2 VOUT2 5 VOUT2 = 2.8V R3 + C3 1µF R4 VIN = 4.2V + C1 1µF ON OFF ON OFF Figure 1. ADP223/ADP225 1 EN1 SENSE1 8 ADP222/ ADP224 2 EN2 VOUT1 7 3 GND VIN 6 4 SENSE2 VOUT2 5 VOUT1 = 1.5V + C2 1µF VOUT2 = 3.3V + C3 1µF 09376-101 GENERAL DESCRIPTION The 300 mA, adjustable dual output ADP223/ADP225 and fixed dual output ADP222/ADP224 combine high PSRR, low noise, low quiescent current, and low dropout voltage in a voltage regulator that is i...