AIC2858F

AIC2858F 3A 23V Synchronous Step-Down Converter  FEATURES  3A Continuous Output Current  Programmable Soft Start  100mΩ Internal Power MOSFET Switches  Stable with Low ESR Output Ceramic Capaci- tors  Up to 95% Efficiency  <1µA Supply Current in Shutdown Mode  Fixed 340KHz Frequency  Thermal Shutdown  Cycle by Cycle Over Current Protection  Wide 4.75 to 23V Operating Input Range  Output Adjustable from 0.925V to 12V  Under Voltage Lockout  APPLICATIONS  Networking Systems such as Modems & Routers  Distributed Power Systems  Pre-Regulator for Linear Regulators.  Set-top Box  DESCRIPTION The AIC2858F is a synchronous step-down regulator with an integrated Power MOSFET. It achieves 3A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-bycycle current limiting and thermal shutdown. Adjustable soft-start reduces the stress on the input source and the output overshoot at turnon. In shutdown mode, the regulator draws 1µA or less of supply current. The AIC2858F is available in a SOP-8 with Exposed Pad Package.  TYPICAL APPLICATIONS CIRCUIT 12V C1 10uF U1 2 IN ON OFF 7 EN 6 COMP C2 10uF Cc 3.3nF Rc 10k 4 GND AIC2858F C6 BS 1 SW 3 10nF FB 5 SS 8 C5 10nF L1 15uH 5V C3 22uF C4 22uF R1 44.2k R2 10k Analog Integrations Corporation Typical Application Circuit Si-Soft Research Ce...