The KF8353 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 KF8353， 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 KF 8353 ideal for applications such as the power supply unit of portable equipment.

  Features

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

Work frequency: 300KHz

External parts: Coil, capacitor, diode

Accuracy of +2.5%

High efficiency: 88%

Shutdown function

Low ripple, Low noise

  Application

Digital cameras

Electronic notebooks and PDAs

Portable CD/MD players

Cameras, video equipment,

Communications equipment

Power supply for microcomputers

异步DC-DC升压IC

异步DC-DC升压IC

异步DC-DC升压IC