XC9131 Series ETR04012-011 1A Driver Transistor Built-In, Multi Functional Step-Up DC/DC Converters GreenOperation Compatible GENERAL DESCRIPTION XC9131 series are synchronous step-up DC/DC converters with a 0.2 (TYP.) N-channel driver transistor and a 0.2(TYP.) synchronous P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 1.0A by reducing ON resistance of the built-in transistors. The series are able to start operation under the condition which has 0.9V input voltage to generate 3.3V output voltage with a 33load resistor, suitable for mobile equipment using only one Alkaline battery or one Nickel metal hydride battery. During the operation of a shutdown, the load disconnection function enables to cut the current conduction path from the input to the output. The series has 0.5V (0.01V) reference voltage integrated and being able to set an output voltage with external components. APPLICATIONS FEATURES Input Voltage Range : 0.65V~5.5V Digital audio equipments Output Voltage Range : 1.8V~5.0V Digital still cameras / Camcorders (V =0.50V0.01V Set up with external FB components) Computer mouses Oscillation Frequency : 1.2MHz (15%) Multi-function power supplies Input Current : 1.0A Output Current : 500mA V =3.3V, V =1.8V(TYP.) OUT IN Control Mode Selection : PWM or Auto PWM/PFM Load Transient Response :100mV V =3.3V, OUT V =1.8V, I =1mA200mA IN OUT Protection Circuits : Thermal shutdown Over-current limit Functions : Soft-start Load Disconnection Function C Auto Discharge Function L Flag-out Function Output Capacitor : Ceramic Capacitor Operating Ambient Temperature : -40~+85 Package : USP-10B Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS XC9131 Series (FB) XC9131x05C (V =3.3V) O UT L=4.7H(LTF5022-LC), C =20F(LMK212BJ106KG*2) L CIN=10F(LMK212BJ106KG), CDD=0.47F(EMK107BJ474KA) R =560k, R =100k, C =10pF, FO=OPEN FB1 FB2 FB 100 C V IN OUT 90 BAT V OUT 80 V =1.8V PGND IN RFB1 Lx C L 70 L C V FB IN 2.4V AGND 60 CDD R MODE FB2 50 MODE FB C DD 40 FO EN FO EN 30 PWM/PFM 20 PWM 10 0 0.1 1 10 100 1000 Output Current: I (mA) OUT 1/28 Efficiency: EFFI (%) XC9131 Series PIN CONFIGURATION FO 5 6 EN FO 5 6 EN FO 5 6 EN MODE CDF MODE NC MODE 4 7 FB 4 7 4 7 CDD 3 8 AGND CDD CDD 3 8 AGND 3 8 AGND 2 9 PGND 9 PGND 2 9 PGND Lx Lx 2 Lx BAT 1 10 VOUT BAT 1 10 VOUT BAT 1 10 VOUT USP-10B USP-10B USP-10B ( BOTTOM VIEW ) ( BOTTOM VIEW ) ( BOTTOM VIEW ) XC9136 series XC9135 series PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTIONS 1 BAT Power Input 2 Lx Switching 3 CDD Bypass Capacitor Connection 4 MODE Mode Switching 5 FO Flag Output 6 EN Enable 7 FB Output Voltage Monitoring 8 AGND Analog Ground 9 PGND Power Ground 10 VOUT Output Voltage * The dissipation pad for the USP-10B package should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the AGND (No.8) or PGND (No.9) pin. *Please short the GND pins (pins 8 and 9). FUNCTION CHART 1. EN Pin Function EN PIN FUNCTIONS H Operation L Stop * Do not leave the EN pin open. 2. MODE Pin Function MODE PIN FUNCTIONS H PWM L PWM/PFM automatic control * Do not leave the MODE pin open. 2/28