Datasheet BL8531 (Belling)

BL8531 High Efficiency Low Noise PFM Step-up DC/DC Converter DESCRIPTION FEATURES BL8531 series are CMOS-based PFM step-up DC- • Deliver 200mA at 3.3V Output voltage with DC Converter. The converter can start up by 1.8V input Voltage supply voltage as low as 0.8V, and capable of • Low start-up voltage (when the output delivering maximum 200mA output current at current is 1mA)-----------------------------0.8V 3.3V output with 1.8V input Voltage. Quiescent • Output voltage can be adjusted from 2.5V～ current drawn from power source is as low as 6.0V (In 0.1V step) 5.5uA. All of these features make BL8531 series • Output voltage accuracy ---------------±2％ be suitable for the portable devices, which are • Low temperature-drift coefficient of the supplied by a single battery to four-cell batteries. output voltage--------------------±100ppm/℃ • To reduce the noise caused by the switch Only three external components are regulator, BL8531 is well considerate in circuit necessary: An inductor, a Schottky diode and design and manufacture, so that the interferer to an output filter capacitor other circuits by the device is reduced greatly. • High power conversion efficiency-----85％ • Low quiescent current drawn from power BL8531 integrates stable reference circuits and source-------------------------------------<5.5uA trimming technology, so it can afford high precision and low temperature-drift coefficient of APPLICATIONS the output voltage. • BL8531 is available in SOT-89-3, SOT-23-3, SOT- Power Source for PDA, DSC, MP3 Player, Electronic toy and wireless mouse 23-5 and TO-92 packages, which is PB free. And in • 5-pin packages, such as SOT-23-5, the device can Power Source for a Single or Dual-cell be switch on or off easily by CE pin, to minimize Battery-Powered Equipments the standby supply current. • Power Source for LED TYPICAL APPLICATION ELECTRICAL CHARACTERISTICS Output Voltage VS. Output Current (Vout=3.3V) 4.0 3.5 3.0 BL8531 ) 2.5 t (V u 2.0 Vin=0.9V o V Vin=1.0V 1.5 Vin=1.2V Vin=1.5V 1.0 Vin=1.8V 0.5 Vin=2.0V Vin=2.5V 0.0 0 0.1 0.2 0.3 0.4 0.5 Iout (A) www.belling.com.cn 1