KX8530-251SM

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