FAN2012 Datasheet | Fairchild Semiconductor

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 puter - munications 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 acplished with very small ponents. Protection features include input under-voltage lockout, short-circuit protection, and thermal shutdown. Softstart limits inrush current during start-up conditions. The device is available in a 3x3 mm 6-lead molded leadless package (MLP), making it possible to build a 1.5 A plete DC-DC converter in limited space on the printed circuit board (PCB). Ordering Information Part Number FAN2012MPX FAN2012EMPX Output Voltage Adjustable Adjustable Operating Temperature Range 0°C to 85°C -40°C to 85°C Package 3x3 mm 6-Lead MLP 3x3 mm 6-Lead MLP © 2004 Fairchild Semiconductor Corporation FAN2012 - Rev. 1.0.5 .fairchildsemi. FAN 2012 - 1.5 A Low-Voltage, Current-Mode Synchronous PWM Buck Regulator Typical Application R1 VOUT FB 1 10K R2 PGND L1 SW...