Integrated Voltage Regulator Maximizes System Efficiency for DC-DC Applications
Mon, 02/08/2010 - 7:30am
The IR3870M SupIRBuck from International Rectifier is an integrated voltage regulator for notebook and desktop computers, game consoles, consumer electronics applications such as set top boxes, and general purpose point-of-load (POL) DC-DC converters. The device features a hysteretic constant on-time modulator with adaptive dead-time control and on-state resistance (RDS(on)) current sensing to achieve maximum efficiency for notebooks. The IR3870M is capable of delivering up to 10A in environments with up to 60°C ambient temperatures and features diode emulation for improved light load efficiency. The device also offers a charge pump output (CPO) option for enhancing the MOSFET gate drive to deliver highest efficiency at medium to full load conditions. In addition, the IR3870M has a wide input voltage range of 3V to 26V and can be programmed for output voltages of 0.5V to 12V by an external resistor divider network.