UNISONIC TECHNOLOGIES CO., LTD P1580
380KHz, 2.5A STEP-DOWN SWITCHING REGULATOR
DESCRIPTION
LINEAR INTEGRATED CIRCUIT...
UNISONIC TECHNOLOGIES CO., LTD P1580
380KHz, 2.5A STEP-DOWN SWITCHING REGULATOR
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The UTC P1580 is a current mode, PWM controller with 380kHz fixed frequency. It achieves 2.5A continuous output current over a wide input supply range with excellent load and line regulation. By using an external compensation pin, this device offers user flexibility in determining loop dynamic. The UTC P1580 integrates control, monitor and protection functions to provide a low cost and perfect power solution. The device provides 3.5 to 28V wide range operating input and high-efficiency up to 90%. An Under-
Voltage-Lock-Output (UVLO) circuit monitors the supply
voltage to prevent from wrong logic control. An internal 1.222V reference
voltage provides low output
voltage down to 1.22V for further applications. The over-current protection of controller monitors the output current by using the
voltage drop across a current sensing resistor. Additional under
voltage protection monitors the
voltage on FB pin for short-circuits protection. The UTC P1580 provides fast transient response and requires very few external devices for operation.
FEATURES
* 2.5A Output Current * 380kHz Frequency of Operation * 3.5V to 28V Input
Voltage Range * 5μA Shutdown Supply Current * Output Adjustable From 1.22 to 21 * Frequency Feedback at Short Circuit * Thermal Shutdown * Under
Voltage Lock Output * Current Mode With Low ESR Output Ceramic
Capacitors * Up to 90% Efficiency *...