CE8303D50M。CMOS PFM-control，电流

The CE8303 is a CMOS PFM-control step-up switching DC/DC converter. The VFM controller allows the duty ratio to be automatically switched according to the load, enabling products with a low ripple over a wide range, high efficiency, and high output current. With the CE8303, a step-up switching DC/DC converter can be configured by using an external coil, capacitor, and diode. The built-in MOSFET is turned off by a protection circuit when the voltage at the LX pin exceeds the limit to prevent it from being damaged. This feature, along with the mini package and low current consumption, makes the CE8303 ideal for applications such as the power supply unit of portable equipment.

? FEATURES

? Low voltage operation: Startup at 0.9 V @IOUT = 1 mA

? Work frequency: 300KHz

? External parts: Coil, capacitor, diode

? Accuracy of ±2.5%

? High efficiency： 87%（typ.）

? Shutdown function

? Low ripple, Low noise

? APPLICATIONS

? Digital cameras

? Electronic notebooks and PDAs

? Portable