A7531

AiT Semiconductor Inc. www.ait-ic.com A7531 DC-DC CONVERTER/ BUCK (STEP-DOWN) HIGH EFFICIENCY, MULTI-FUNCTION DESCRIPTION FEATURES A7531 series are CMOS-based PFM step-up DC-DC  Deliver 500mA at 4.0V Output voltage with 2V 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 A7531 series be suitable     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 for the portable devices, which are supplied by a inductor, a Schottky diode, an output filter single battery to four-cell batteries. A7531 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. A7531 integrates stable reference circuits and trimming technology, so it can afford high precision    capacitor and a NMOSFET or a NPN transistor High power conversion efficiency 90％ Low quiescent current drawn from power source 6uA Available in SOT-25 Package and low temperature-drift coefficient of the output APPLICAT...