XC6420 Series ETR0352-010 150mA Small Dual LDO Regulator with ON/OFF Switch GENERAL DESCRIPTION The XC6420 series is a small dual CMOS LDO regulator with 2-channel 150mA outputs. The series features high speed, high accuracy, high ripple rejection and low dropout voltage. The series is capable of high density board installation by the small package of two low on-resistance regulators. Each output voltage is internally set in a range from 1.2V to 3.6V in increments of 0.05V with 2% accuracy. The EN function controls the two regulators on/off independently. In the stand-by mode, the electric charge at the output capacitor CL is discharged via the internal switch and as a result the VOUT pin quickly returns to the VSS level. The series is also compatible with low ESR ceramic capacitors. The high level of output stability is maintained even during frequent load fluctuations, due to the excellent transient response performance. The two regulators are completely isolated so that a cross talk during load fluctuations is minimized. APPLICATIONS FEATURES Maximum Output Current : 150mA Smart phones / Mobile phones Operating Voltage Range : 1.6V ~ 5.5V Portable game consoles Output Voltage : 1.2V ~ 3.6V (2%) 0.05V increments Digital audio equipments Dropout Voltage : 190mV IOUT=150mA (VOUT=3.3V) Digital still cameras / Camcorders Low Power Consumption : 55A / ch (TYP.) Stand-by Current : 0.1A Ripple Rejection : 75dB 1kHz EN Function : Active High C High Speed Auto Discharge L Protection Circuit : Current Limit 250mA (TYP.) Short Circuit 50mA (TYP.) Output Capacitor : 1.0F Ceramic Capacitor Operating Ambient Temperature : -40 ~ 85 Packages : SOT-26 USPN-6 USP-6B04 Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUITS CHARACTERISTICS Ripple Rejection EN1 6. 1.VOUT1 CL:1uF VIN 5. 2.VOUT2 ceramic ( ) CIN :1uF EN2 4. CL:1uF XC6420(V =1.8V) OUT 3.VSS ceramic ( ) ceramic ( ) V =3.0V+0.5V , Ta=25 IN p-pAC USP-6B04 C =0.1F(ceramic), C =1.0F(ceramic) IN L (BOTTOM VIEW) 100 80 VSS EN1 VOUT1 EN1 3 4 6 1 CL:1uF 5 V VIN 2 OUT1 60 ceramic ( ) VIN VSS 2 5 EN2 1 6 VOUT2 CIN:1uF CIN :1uF VOUT2 40 (ceramic) IOUT=0.1mA ceramic 3 4 ( ) IOUT=1mA CL:1uF (ceramic) EN2 IOUT=30mA 20 SOT-26 CL :1uF CL:1uF IOUT=100mA (TOP VIEW) (ceramic) ceramic ( ) 0 USPN-6 (BOTTOM VIEW) 0.1 1 10 100 1000 Ripple Frequency : f (kHz) 1/23 Ripple Rejection Rate : RR (dB)XC6420 Series PIN CONFIGURATION V V V OUT1 SS OUT2 6 5 4 1 V V 6 1 EN2 EN1 6 OUT1 OUT2 V 5 2 V V 5 2 V IN OUT2 OUT1 IN 3 V EN2 4 V 4 3 EN1 SS SS 1 2 3 EN1 V EN2 IN USPN-6 USP-6B04 SOT-26 (BOTTOM VIEW) (BOTTOM VIEW) (TOP VIEW) PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTIONS SOT-26 USPN-6 USP-6B04 1 3 6 EN1 ON/OFF Control 1 2 2 5 VIN Power Input 3 1 4 EN2 ON/OFF Control 2 4 6 2 V Output 2 OUT2 5 4 3 V Ground SS 6 5 1 VOUT1 Output 1 PIN FUNCTION ASSIGNMENT PIN NAME SIGNAL STATUS L Stand-by EN H Active OPEN Stand-by H = High Level , L = Low Level An internal pull-down resister maintains the EN pin voltage to be low. 2/23