IR3870M SupIRBuck

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PRESS RELEASE
IR3870M SupIRBuck Integrated Voltage Regulator
DATA SHEETS
The IR3870M SupIRBuck 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
IR3870M features IRs latest advances in control
IC, MOSFET and package integration technologies
and is an easy-to-use and fully integrated DC-DC
voltage regulator designed to deliver maximum
efficiency in systems that require light load as
well as full load performance.
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SuPIRBuck PAGE

• Advantages
• The IR3870M 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 IR3870 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.
• The IR3870 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-boas 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 same feature-rich controller IC utilized in
  the IR3870M is also available as a stand-alone
  device, the IR3710M. This device allows
  designers who use the IR3870 for lighter loads to
  easily scale up to loads as high as 24A by using
  the IC with a pair of external IR MOSFETs.

• Features
• Input voltage range 3V to 26V
• Output voltage range 0.5V to 12
• Continuous 10A load capability
• Constant on-time control
• Excellent efficiency at very low output current
  levels
• Gate drive charge pump option to maximize
  efficiency at higher output current levels
• Compensation loop not required
• Programmable switching frequency, soft start, and
  over current protection
• Power good output
• Precision voltage reference (0.5V, /- 1)
• Enable input with voltage monitoring capability
• Pre-bias start up
• Under/over voltage fault protection
• Ultra small, low profile 5 x 6 mm QFN package