PWM STEP UP DC-DC CONTROLLER
DESCRIPTION
As a dual digital transistor the UTC UB2K is epitaxial planar The UC3380 is PWM step up DC-DC switching controller that operates from 0.9V. The low start up input voltage makes UC3380
specially designed for powering portable equipment from one or two cells battery packs. This device consist of a soft start circuit, a reference
voltage source, an error amplifier, an oscillator, a phase compensation, a PWM controller and an output drive circuit for driving external power transistor.
Additionally, a chip enable feature is provided to power down the converter for extended battery life. The device features a voltage mode
PWM control loop, providing stable and high efficiency operation over a broad load current range.
FEATURES
* 0.9V Low Start-Up Input Voltage at 1mA Load
* Low Operation Current
* 0.5uA Low Shutdown Current
* Fix Frequency PWM at 300KHZ
* Built in PWM Switching Control Circuit ,Duty Ratio is 0~78%
* Output Voltage:0.1V Step Setting is Available Between 2.0V and 6.5V
* Soft Start Time: 3ms
* Shutdown Function |
