380KHz, 3A STEP-DOWN SWITCHING REGULATOR
DESCRIPTION
The UTC P2583 is a fixed 380kHz frequency, current mode, PWM
controller with an internal power MOSFET. It achieves 3A continuous
output current over a wide input supply range with excellent load and line
regulation. Equipped with an external compensation pin, this device offers
user flexibility in determining loop dynamic.
The UTC P2583 integrates controls, monitoring and protection
functions into a single 8-pin package to provide a low cost and perfect
power solution. The device provides wide 3.6V to 28V operating input
range, also highly efficient with peak operating efficiency at 90%.
An Under- Voltage-Lock-Output (UVLO) circuit monitors the Vin supply
voltage to prevent wrong logic controls. An internal 1.222V reference
provides low output voltage down to 1.22V for further applications. The
controller’s over-current protection monitors the output current by using the
voltage drop across a current sensing resistor. Additional under voltage
protections monitor the voltage on FB pin for short-circuit protections.
The UTC P2583 provides fast transient respond and requires very few
external devices for operation. |
