AT1799

www.DataSheet4U.com AT1799 2A Step-Down Voltage Regulator Feature Description ‧ 4.75V to 16V Supply Voltage Operating AT1799 is a voltage-mode PWM step-down DC-DC converter capable of driving up to 2A Range. over a wide input supply range with excellent ‧ 380KHz 15% Fixed Switching Frequency. loads line and load regulation characteristics. High ‧ Voltage-Mode PWM Step-Down Regulator. efficiency is obtained through the use of a low ‧ Built-in Power MOSFET, Rds(on) 100m . Rds(on) P-channel power switch. ‧ 2A Output Current, Up to 91.9% Efficiency It uses a fixed switching frequency up to 380KHz ‧ 1.215V 1.5% Internal Reference thus allowing smaller sized components. The ‧ Shutdown Current less than 20uA. output voltage level is user-programmable via an ‧ Thermal-Shutdown and Built-in Soft-Start. external resistive voltage divider. The built-in ‧ Cycle-by-Cycle Current-Limit Protection. soft-start can reduce inrush current on the input ‧ Short Circuitry Protection. source at turn on. ‧ Under-Voltage Lockout Protection. ‧ Output Voltage Adjustable From 1.215V to The device also has built-in cycle-by-cycle current-limit, thermal shutdown, under-voltage 16V. lockout and an ON/OFF logic-control that can ‧ SOP-8 Package. power down the regulator to a shutdown mode. In shutdown mode the regulator draws less than 20uA of supply current. When a short circuit is detected Application on the output , the device immediately change ‧ Distributed Power Systems switching frequency to 42 KHz...