IC SMD Type PFM Step-up DC/DC Converter With High Efficiency And Low Noise KX8530 Outline Features The KX8530 series are CMOS-based PFM step-up Deliver 200mA at 3.3V Output voltage with 1.8V DC-DC Converter. The converter can start up by input Voltage supply voltage as low as 0.8V, and capable of Low start-up voltage (when the output current is delivering maximum 200mA output current at 3.3V 1mA)----------------------------------------------0.8V output with 1.8V input Voltage. Quiescent current The converter output voltage can be adjusted drawn from power source is as low as 7uA. All of from 2.5V these features make KX8530 series be suitable for Output voltage accuracy ----------------------±2% the portable devices, which are supplied by a single Low temperature-drift coefficient of the output battery to four-cell batteries. voltage-----------------------------------±100ppm/ To reduce the noise caused by the switch 6.0V(In 0.1V step). Only three external components are necessary: regulator, KX8530 is well considerated in circuit An inductor, a Schottky diode and an output filter design and manufacture. So that the interferer to capacitor other circuits by the device is reduced greatly. High power conversion efficiency-------------85% KX8530 integrates stable reference circuits and trimming technology, so it can afford high precision Low quiescent current drawn from power source----------------------------------------- 7ìA and low temperature-drift coefficient of the output Applications voltage. KX8530 is available in SOT-89 SOT-23 and Power source for PDA DSC MP3 SOT-153 packages which is PB free. And in 5-pin Player electronic toy and wireless mouse packages, such as SOT-153, the device can be Power source for a single or dual-cell switch on or off easily by CE pin, to minimize the battery-powered equipments standby supply current. Power source for LED PIN Configuration www.kexin.com.cn 1 IC SMD Type KX8530 Selection Guide PIN Description Pin No. Symbol SOT-89 SOT-23 SOT-153 1 1 4 2 2 2 3 3 5 GND Vss Vout Lx Ext 3 NC 1 CE Description Ground pin Output pin, power supply for internal circuits Switching pin Chip enable pin (active high) PRODUCTOR LIST : 2 Product Name Output Voltage Lx Tr. Driver Chip Enable Package KX8530-XX1SM XX V Internal No SOT-89 KX8530-XX1RM XXV Internal No SOT-23 KX8530-XX2RN XXV Internal Yes SOT-153 KX8530-XX3SM XXV External No SOT-89 KX8530-XX3RM XXV External No SOT-23 KX8530-XX4RN XXV External Yes SOT-153 www.kexin.com.cn IC SMD Type KX8530 Block Diagram Absolute Maximum Ratings Input voltage range-----------------------------------------------------------------------------------0.3V 12V Input voltage: Vi(LX) ---------------------------------------------------------------------------------0.3V (Vout +0.3) CE pin voltage-----------------------------------------------------------------------------------------0.3V (Vout +0.3) Lx pin output current ---------------------------------------------------------------------------------0.7A Maximum power dissipation, Pd T=25 SOT-89----------------------------------------------------------------------------------------------0.5W SOT-153--------------------------------------------------------------------------------------------0.15W SOT-23----------------------------------------------------------------------------------------------0.15W Maximum junction temperature ---------------------------------------------------------------------150 Operating free-air temperature range --------------------------------------------------------- -20 +80 Storage temperature range ---------------------------------------------------------------------- -40 125 Lead temperature and time -------------------------------------------------------------------------260 ,10S Recommended Operating Conditions Parameter Min Nom Input voltage range 0.8 Inductor 10 Input capacitor 0 10 Output capacitor 47 100 Operating junction temperature -20 27 Max Unit Vout V 100 ìH ìF 220 ìF 85 www.kexin.com.cn 3 IC SMD Type KX8530 Electrical Characteristics Ta = 25 Parameter Symbol Output Voltage Vout Input Voltage Vin Input Current Iin Start-up voltage Vstart Hold-on voltage Vhold Quiescent current drawn Testconditons Iout=0mA Iout=1mA,Vin from power 2 0V Max Unit 2.45 2.5 2.55 2.7 2.754 2.94 3.0 3.06 3.234 3.3 3.366 3.528 3.6 3.672 3.92 4.0 4.08 4.9 5.0 5.1 5.88 6.0 6.12 12 V 12 15 uA 0.8 0.9 V 0 2V Iout=1mA,Vin Typ 2.646 Vin=Vout*0.6 Without IDD Min 0.6 0.7 V V external components, Vout 4 7 uA 0.4 0.5 Ù 0.5 uA =Vout*1.05 source Switch ON Resistance Rswon LX leakage current ILXleak CE "H" threshold voltage VCEH VCE 0 2V CE"H" threshold voltage VCEL VCE Oscillator frequency Fosc LX on "L" side Vout=Vout*0.96 Oscillator duty cycle Maxdty On Vlx"L" Efficiency Vout=Vlx=6V 0.6 ç Note 1. Diode: Schottky type, such as :1N5817, 1N5819, 1N5822 2. Inductor: 27uH(R<0.5Ù) 3. Capacitor: 100uF(Tantalum type) Test Circuits 4 www.kexin.com.cn V 0.3 0.6 V 300 350 400 Khz 70 75 80 % 2 0V side 0.9 85 % IC SMD Type KX8530 www.kexin.com.cn 5 IC SMD Type KX8530 Typical Characteristic 6 www.kexin.com.cn IC SMD Type KX8530 www.kexin.com.cn 7