XC6421 Series ETR03053-005 300mA Small High Speed Dual LDO Regulator, Built-in Inrush Current Protection GENERAL DESCRIPTION The XC6421 series is an ultra small CMOS dual LDO regulator, mounting 300mA 2-channel small high speed LDO. The series features high accuracy, high ripple rejection and low dropout voltage. The series is capable of high density board installation by the ultra small package of two low on-resistance regulators. Both output accuracies are 1% by laser trimming. Each regulator can be turned off independently to be in stand-by mode by controlling EN pin. In this state, the electric charge at the output capacitor (C ) is discharged via the internal auto-discharge switch, and as a result L the V voltage quickly returns to the V level. OUT SS The output stabilization capacitor (C ) is also compatible with low ESR ceramic capacitors. L The high level of output stability is maintained even during frequent load fluctuations, due to the excellent transient response performance. Over current protection circuit and over heat protection circuit are mounted, these circuits start working when output current reaches junction temperature or limit current. The two regulators are completely isolated so that a cross talk during load fluctuations is minimized APPLICATIONS FEATURES Maximum Output Current 300mA Smart phones / Mobile phones Operating Voltage Range 1.6V 5.5V Portable game consoles Output Voltages 1.2V 3.6V (0.05V increments) Output Accuracy 1% (V 2.00V) OUT Digital audio equipments 20mV(V 1.95V) OUT Digital still cameras / Camcorders Dropout Voltage 210mV I =300mA V =3.0V OUT OUT Low Power Consumption 90 A / ch (TYP.) Stand-by Current 0.1 A Ripple Rejection 75dB 1kHz ON/OFF Control Active High C Discharge L Protection Current Limit 450mA (TYP.) Short Circuit 125mA (TYP.) Inrush Current Protection Thermal Shutdown Low ESR Capacitor 1.0 F Ceramic Capacitor Operating Ambient Temperature -40 +85 Package USP-6C Environmentally Friendly EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUITS CHARACTERISTICS 1/25 XC6421 Series PIN CONFIGURATION V OUT2 EN2 V V IN OUT1 EN1 V SS * The dissipation pad for the USP-6C package should be solder-plated in recommended mount pattern and metal masking to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the V (No. 4) pin. SS PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTIONS USP-6C 1 EN2 ON/OFF Control 2 2 V Power Input IN 3 EN1 ON/OFF Control 1 4 V Ground SS 5 V Output 1 OUT1 6 V Output 2 OUT2 2/25