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 available in a 3x3 mm 6-lead molded leadless package (MLP), making it possible to build a 1.5 A complete DC-DC converter in limited space on the printed circuit board (PCB).