International Rectifier (IR) has launched the IR3870M SupIRBuck 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 IR3870M features a hysteretic constant on-time modulator with adaptive dead-time control and on-state resistance (RDSon) 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.
The IR3870M also features pre-bias start-up, very precise 0.5V reference, over- and under-voltage shut down, power good output, and enable input with voltage monitoring capability. The device also offers constant on-time control, programmable switching frequency, soft start, and over-current protection.
The innovative SupIRBuck family of versatile wide input, single output integrated point-of-load (POL) DC/DC voltage regulators integrates IR’s high performance control ICs optimized with benchmark HEXFET MOSFETs in a 5x6mm, slim 0.9mm profile power QFN package.
International Rectifier
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