XC9306B05G0R-G is Discontinued. XC9306B05G0R-G ETR06003-003 Synchronous Rectification Buck-Boost DC/DC Converter IC GreenOperation Compatible GENERAL DESCRIPTION The XC9306B05G0R-G is a synchronous buck-boost DC/DC converter IC with built-in FETs. The circuit topology switches over between buck and boost smoothly based on the relationship of the input voltage and the output voltage which is observed by the internal PWM controller. Due to the internal FETs, the number of external components is reduced. Also, a 6MHz switching frequency enables smaller external components, such as a coil and capacitors, to be used. The input voltage range is 2.5V~5.5V and the output voltage is adjustable from 0.8V to 5.0V by using external resistors since the reference voltage circuit is embedded internally. Synchronous topology provides high efficiency performance and the control method is selectable from either PWM mode (MODE pin: H) or PFM mode (MODE pin: L). Under PFM mode, the efficiency at light load current will be improved. When a L signal level is fed to the CE pin, the product is in stand-by mode and the consumption current is going to be 2.0uA (Max.) or less. Regarding other functions, the product has UVLO, thermal shutdown protection and soft-start. The soft-start time is approx. 100us and the output voltage can rise up quickly. FEATURES APPLICATIONS Input Voltage Range : 2.5V5.5V RF Power Amplifiers Output Voltage Setting Range : 0.8V5.0V (FB=0.5V) Mobile Phones, Smart Phones Oscillation Frequency : 6.0MHz Portable Information Devices Efficiency : 92%(VIN=4.2V, VOUT=3.3V/300mA) MP3 Players Control Methods : PWM (Mode=High, ILIM=Low) Digital Still Cameras Protection Circuit : Current Limit Products powered by Li-ion 1 cell batteries Thermal Shutdown Function : Soft-start Power Save (Mode=Low) UVLO Output Capacitor : Ceramic Capacitor Compatible Coil Value : 0.5 (0.47) H Package : WLP-20-01 Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS XC9306B05G0R-G Vout=3.3V L1 100 PFM Lx1 Lx2 80 ILIM MODE VIN VOUT VIN VOUT 60 R1 V =2.5V IN VDD FB CL 40 CIN1 CIN2 R3 R2 4.2V VSEL SW CE PWM PGND VSEL AGND 20 0 0.1 1 10 100 1000 Output Current : I mA OUT 1/14 Efficiency : EFFI % XC9306B05G0R-G is Discontinued. XC9306B05G0R-G BLOCK DIAGRAM Lx1 Lx2 SW5 SW1 VOUT VIN SW2 SW3 SW4 Current Sensor VSEL Gate Control VDD VSEL SW Error Amp. Oscillator CE AGND Device Thermal Shutdown MODE Vref Control UVLO PGND ILIM FB PIN CONFIGURATION NOTE: Please connect the AGND pin and PGND pin when CE ILIM VSEL VSEL SW AGND 4 operating. MODE AGND FB VDD AGND 3 PGND LX1 LX2 VOUT VIN 2 VIN LX1 PGND LX2 VOUT 1 A B C D E (TOP VIEW) PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTIONS A1,A2 VIN Power Input A3 VDD Analog Input A4 CE Chip Enable B1,B2,D1,D2 Lx1,Lx2 Connection pins for Inductor B3 MODE Power Save Mode(High:PWM mode,Low:PFM mode) B4 I Current Limit Select LIM C1,C2 PGND Power Ground C3,D3,E4 AGND Analog Ground C4 V Resistor(R3) ON/OFF Switch SEL E1,E2 V Output OUT E3 FB Output Voltage Monitior D4 VSEL SW Resistor(R3) Connection pin 2/14