XC9141/XC9142 Series ETR04018-002 Load Disconnection Function, 0.8A Step-up DC/DC Converters GreenOperation-compatible GENERAL DESCRIPTION XC9141/XC9142 series are synchronous step-up DC/DC converters with a 0.3 (TYP.) N-channel driver transistor and a 0.3(TYP.) synchronous P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 0.8A 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 100 load resistor, suitable for mobile equipment using only one Alkaline battery or one Nickel metal hydride battery. The output voltage can be set from 1.8V to 5.5V (2.0%) in steps of 0.1V.With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected for suiting to your particular application. During the devices enter stand-by mode, A, D types prevent the application malfunction by CL Discharge Function which can quickly discharge the electric charge at the output capacitor (CL). B, E types is able to drive RTC etc. by Bypass Switch Function to maintain continuity between the input and output. C, F types is able to connect in parallel with other power supplies by Load Disconnection Function which breaks continuity between the input and output. APPLICATIONS FEATURES Portable equipment Input Voltage Range : 0.65V6.0V Beauty & health equipment Fixed Output Voltage : 1.8V5.5V (0.1V increments) Oscillation Frequency : 1.2MHz (15%), 3.0MHz (20%) Wearable devices Input Current : 0.8A Game & Hobby Output Current : 500mA V =5.0V, V =3.3V (TYP.) OUT BAT PC Peripherals 350mA V =3.3V, V =1.8V (TYP.) OUT BAT Devices with 1~3 Alkaline, Control Mode Selection : PWM (XC9141 Series) or 1~3 Nickel Hydride, 1 Lithium and 1 Li-ion Auto PWM/PFM (XC9142 Series) Load Transient Response : 100mV V =3.3V, V =1.8V, OUT BAT I =1mA 200mA(tr=5s) OUT Protection Circuits : Over-current limit Integral latch method (D,E,F type) Output short-circuit protection (D,E,F type) Functions : Soft-start Load Disconnection Function (A,C,D,F type) C Auto Discharge Function (A,D type) L Bypass Switch Function (B,E type) Output Capacitor : Ceramic Capacitor Operating Ambient Temperature : -40+85 Package : SOT-25,USP-6C,WLP-6-01 Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS XC9141A33C / XC9142A33C L=4.7H(LQH5BPN4R7NT0L) C =10F(GRM188R60J106M),C =10F(GRM188R60J106M) IN L 100 L=4.7H VOUT 90 Lx V OUT 80 70 CL=10F CE CE 60 V =0.9V BAT V =1.2V 50 BAT V =1.8V BAT VBAT 40 V =2.5V BAT GND BAT 30 CIN=10F 20 solid line : XC9141 10 dotted line : XC9142 0 0.1 1 10 100 1000 Output Current : I mA OUT 1/34 Efficiency : EFFI % XC9141/XC9142 Series BLOCK DIAGRAM XC9141A/XC9142A type Lx Load disconnect V Controller OUT Phase CFB RFB1 Current sense V Compensation OUT Error Amp. PWM comparator FB C L Discharge PWM/PFM R FB2 Controller Logic Buffer Driver GND Vref with Soft Start RAMP Wave OSC Generator CE Controller CE Logic V DD V OUT V MAX BAT DD * Diodes inside the circuits are ESD protection diodes and parasitic diodes. * XC9141 series chooses only PWM control. XC9141B/XC9142B type Lx Load disconnect V Controller OUT Phase C R FB FB1 Current sense V Compensation OUT Error Amp. PWM comparator FB PWM/PFM R FB2 Controller Logic Buffer Driver GND Vref with Soft Start RAMP Wave OSC Generator CE Controller Bypass SW CE Logic V DD V OUT V MAX BAT DD * Diodes inside the circuits are ESD protection diodes and parasitic diodes. * XC9141 series chooses only PWM control. XC9142C type Lx Load disconnect V OUT Controller Phase C R FB FB1 Current sense V Compensation OUT Error Amp. PWM comparator FB PWM/PFM R FB2 Controller Logic Buffer Driver GND Vref with Soft Start RAMP Wave OSC Generator CE Controller CE Logic V DD V OUT BAT VDD MAX * Diodes inside the circuits are ESD protection diodes and parasitic diodes. 2/34