BL8531CC3TR50

BL8531C High Efficiency, Multi-Function Step-up DC/DC Controller DESCRIPTION FEATURES  BL8531C series are CMOS-based PFM step-up DCDC Controller with low supply current and high output voltage accuracy. Quiescent current drawn from power source is as low as 6uA. It is capable of delivering 500mA output current at 4.0V output with 2V input Voltage. Only four external components are necessary: An inductor, a Schottky diode, an output filter capacitor and a NMOSFET or a NPN transistor All of these features make BL8531C series be suitable for the portable devices, which are supplied by a single battery to four-cell batteries. BL8531C has a drive pin (EXT) for external transistor. So it is possible to load a large output current with a power transistor which has a low voltage dropout. BL8531C integrates stable reference circuits and trimming technology, so it can afford high precision and low temperature-drift coefficient of the output voltage. BL8531C is available in SOT-23-3, SOT-23-5 and SOT-89-3 packages which are PB free. And in SOT23-5 the device can be switch on or off easily by CE pin, to minimize the standby supply current.        Deliver 500mA at 4.0V Output voltage with 2V input Voltage The controller 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/C Only four external components are necessary: An inductor, a Schottky diode, an output filter capacitor and a NMOSFET or a NPN transistor High power conversion efficiency----------90％ Low quiescent current drawn from power source--------------------------------------------- 6uA Small package--SOT-23-3, SOT-23-5, SOT-89-3 APPLICATIONS    TYPICAL APPLICATION Power source for PDA, DSC, MP3 Player, electronic toy and wireless mouse Power source for a single or dual-cell batterypowered equipments Power source for LED ELECTRICAL CHARACTERISTICS BL8531C www.belling.com.cn 1 BL8531C ORDERING INFORMATION MARKING INFORMATION BL8531C □ 1□ 2□ 3□ 4 Code Product Classification □ 1 □ 2 □ 3 □ 4 Description Marking 3C:Product Code Temperature&Rohs: C: -40~85C , Pb Free Rohs Std. Package type: B3: SOT-23-3 B5: SOT-23-5 C3: SOT-89-3 Packing type: TR: Tape&Reel (Standard) Output voltage: e.g. 25=2.5V 56=5.6V 60=6.0V 3CXX Parameter Value Output Voltage Range EXT Pin Voltage CE Pin Voltage Operating Junction Temperature (Tj) Ambient Temperature (Ta) SOT-23-3 Power Dissipation SOT-23-5 SOT-89-3 Storage Temperature (Ts) Lead Temperature & Time -0.3V-12V -0.3V-(VOUT+0.3) -0.3V-(VOUT+0.3) 125C -40C -85C 250mW 250mW 500mW -40C -150C 260C,10S Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. Value Suggestion: Use tantalum type capacitor to reduce the ripple of the output voltage. Use 1nF filter ceramic type capacitor to connect OUT pin and GND pin. The filter capacitor is recommended as close as possible to OUT pin and GND pin. www.belling.com.cn 2 XX: Output Voltage Product Classification LBXX LLBYW CE GND OUT EXT NC RECOMMENDED WORK CONDITIONS 0.8V-Vout 10-100uH ≥10uF 47-220uF -40C -85C BL8531CCB3TR□ □ Marking 3C:Product Code 3CXX Parameter XX: Output Voltage Product Classification ABSOLUTE MAXIMUM RATING Input Voltage Range Inductor Input Capacitor Output Capacitor Ambient Temperature (Ta) BL8531CCB5TR□ □ BL8531CCC3TR□ □ Marking LB: Product Code XX: Output Voltage LL: LOT NO. B: FAB Code YW: Date Code Chip Enable (Active high) Ground Pin Output Pin, Power supply for internal Switching Pin No Connection BL8531C ELECTRICAL CHARACTERISTICS Default condition (unless otherwise provided): Vin=0.6×Vout, Iout=10mA, Temperature=25C, Use external circuit in test circuit list SYMBOL ITEM Vout Output Voltage Vin Iin Input Voltage Input Current *(No load) IDD Quiescent current * Istandby VCEH VCEL Chip leakage current CE “H” threshold voltage CE “L” threshold voltage Fosc Oscillator frequency IEXTH EXT”H” output current IEXTL EXT”L” output current Duty Oscillator duty cycle TEST CONDITIONS 2.45 2.646 2.94 3.234 3.528 3.92 4.9 5.88 Iout=0mA, Vin=Vout*0.6 No external component, Vout =Vout×1.05 VCE=0V VCE: 02V VCE: 20V Vout=Vout*0.96 Test EXT pin frequency 3.0V