RT9275

Preliminary RT9275 Tiny Package, High Efficiency, Step-Up DC/DC Converter General Description The RT9275 is a compact, high efficiency, and low voltage step-up DC/DC converter with an Adaptive Current Mode PWM control loop, includes an error amplifier, ramp generator, comparator, switch pass element and driver in which providing a stable and high efficient operation over a wide range of load currents. The low start-up input voltage below 1V makes RT9275 suitable for 1 to 4 battery cells applications. Both internal 2.5A switch and driver for driving external power devices (NMOS or NPN) are provided. It is incorporating with softstart function, Under Voltage protection function. RT9275 is available in SOT-23-6 package. Ordering Information RT9275 Package Type E : SOT-23-6 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) Note : RichTek Pb-free and Green products are : `RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. `Suitable for use in SnPb or Pb-free soldering processes. `100% matte tin (Sn) plating. Marking Information For marking information, contact our sales representative directly or through a RichTek distributor located in your area, otherwise visit our website for detail. Features z 1V Low Start-up Input Voltage at 1mA Load z Zero Shutdown Mode Supply Current z 90% Efficiency z 400kHz Switching Frequency z Providing Flexibility for Using Internal and External Powe...