FAN2012

FAN 2012 — 1.5 A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator October 2013 FAN2012 1.5 A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator Features  95% Efficiency, Synchronous Operation  Adjustable Output Voltage from 0.8 V to 3.5 V  4.5 V to 5.5 V Input Voltage Range  Up to 1.5 A Output Current  Fixed-Frequency 1.3 MHz PWM Operation  Soft Start  Excellent Load Transient Response  3 x 3 mm, 6-Lead, MLP Applications  Hard Disk Drive  Set-Top Box  Point-of-Load Power  Notebook Computer  Communications Equipment Description The FAN2012 is a high-efficiency, low-noise, synchronous Pulse Width Modulated (PWM) currentmode DC-DC converter designed for low-voltage applications. It provides up to 1.5 A continuous-load current from the 4.5 V to 5.5 V input. The output voltage is adjustable over a wide range of 0.8 V to 3.5 V by means of an external voltage divider. The FAN2012 has an “Enable Input” and the device can be put in shutdown mode, in which the ground current falls below 1 µA. A current-mode control loop with a fast transient response ensures excellent line and load regulation. The fixed 1.3 MHz switching frequency enables designers to choose a small, inexpensive external inductor and capacitor. Filtering is easily accomplished with very small components. Protection features include input under-voltage lockout, short-circuit protection, and thermal shutdown. Softstart limits inrush current during start-up conditions. The device is availabl...