XC6503 Series ETR0346-009 C Capacitor-Less 500mA Low Power Consumption High Speed LDO Regulator L GENERAL DESCRIPTION The XC6503 series is a 500mA high speed CMOS LDO regulator that can provide stable output voltages even without a load capacitor C . The devices are available in fixed output voltage from 1.2V to 5.0V in 0.05V increments L The C capacitor-less is possible because phase compensation is carried out internally unlike other LDOs where it is done L externally. It results in saving board design space. The current limit fold-back circuit and thermal shutdown circuit work as protection circuit. The XC6503P is a 3-Terminal regulator and the XC6503A/B/C/D has a chip enable function, which enables the entire circuit to be turned off by a low level input signal to the CE pin. When a C capacitor is used, the IC can discharge the electric charge stored at the output capacitor through the internal L switch while in standby state, and as a result the VOUT quickly returns to the VSS level. FEATURES APPLICATIONS Maximum Output Current : 500mA Smart phones / Mobile phones Input Voltage Range : 1.7V 6.0V Portable game consoles Output Voltage Range : 1.2V 5.0V (0.05V increments) Modules (wireless, camera, etc.) Output Accuracy : 1.0% (2.0V5.0V) Bluetooth modules 20mV (1.2V1.95V) Digital TV tuner modules Temperature Stability : 30ppm/ Dropout Voltage : 190mVVOUT=2.8V, IOUT =300mA Low Power Consumption : 15A (TYP.), 0.1A (in standby) High PSRR : 55dB1kHz, V =2.8V OUT Protection Current : Current Limiter (630mA TYP. Short-circuit Protection Thermal Shutdown CL Capacitor-Less : Internal Phase Compensation Operating Ambient Temperature : -40+85 Packages : USP-4, SOT-25, SOT-89-5 (XC6503A-D) SOT-89 (XC6503P) Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUIT CHARACTERISTICS V 1 5 V IN OUT C :0.1F(ceramic) IN CL:0.1F(ceramic) 2 V SS CE 3 4 NC SOT-25 (TOP VIEW) CE 3 2 V SS V V IN 4 1 OUT CL:0.1F(ceramic) USP-4 CIN:0.1F(ceramic) (TOP VIEW) 1/22 XC6503 Series BLOCK DIAGRAMS XC6503 A Series XC6503 B Series V V V V IN OUT IN OUT CFB CFB R1 Current Limit Current Limit R1 & TSD & TSD R DCHG + + Error Error Amp Amp - - R2 R2 each each circuit Voltage circuit Voltage ON/OFF ON/OFF CE CE Reference Reference /CE Control Control V V SS SS XC6503 C Series XC6503 D Series V V IN OUT V V IN OUT CFB CFB R1 Current Limit Current Limit R1 & TSD & TSD R DCHG + + Error Error Amp Amp - - R2 R2 ON/OFF ON/OFF CE CE Control Voltage Control Voltage Reference Reference /CE V V SS SS each each circuit circuit XC6503 P Series V V IN OUT CFB Current Limit R1 & TSD + Error Amp - R2 Voltage Reference V SS * Diodes inside the circuits are ESD protection diodes and parasitic diodes. 2/22