VOLTAGE MODE PWM CONTROLLER WITH LINEAR POWER REGULATOR
DESCRIPTION
The UTC U8021 provides the control and protection features
necessary for a synchronous buck converter and a linear
regulator in high performance graphic card applications.
The UTC U8021 is designed to directly drive the high and low
MOSFETs of the buck converter. It allows the converter to
operate with 4V~25V power rail and as low as 0.5V output. The
UTC U8021 is capable to drive a N-type MOSFET in a linear
regulator with as low as 0.5V output.
The UTC U8021 features soft-start, UVLO, and OCP. The
UTC U8021 monitors the output current by using the Rdson of the
low MOSFET in the buck converter that eliminates the need for a
current sensing resistor.
FEATURES
* 4V~25V power rails
* Internal LDO
* 1.5A gate drive current
* Adaptive non-overlapping gate drives provide shoot-through protection for MOSFETs
* Programmable output voltages
* Internal soft start
* Under voltage lockout
* Short circuit protection |
