Sunnyvale, Calif—Maxim Integrated Products' MAX8737 is a dual, high-power, linear-regulator controller that (with external n-channel MOSFETs) provides two independent low-voltage supplies for notebook computers, point-of-load regulators, and low-voltage bias supplies. The chip, working from a nominal 5 volts, delivers a highly regulated 0.5 to 2.5 volts at each output (no-load accuracy is ±5 mV), with the external MOSFETs facilitating a scaleable current design that provides good load regulation (±1 percent) at outputs to 5 amps.
Protection features include foldback current limiting (implemented with an external resistive divider) to reduce overall power dissipation, output under-voltage timeout circuitry for low-cost applications that omit the current-sense resistor, and thermal limiting (device has an internal sensor). Each linear regulator section has adjustable soft-start and a delayed power-good signal that indicates when the MAX8737 is in regulation.
The MAX8737 is screened for the extended-industrial temperature range (-40 to +85°C). A preliminary data sheet for the device is available at
The MAX8737, available in a 16-pin, 4-by-4 mm TQFN package, is priced starting at $1.29 (1000-up, FOB USA). A preassembled MAX8737EVKIT with recommended external components is available to reduce design time.
Maxim Integrated Products, 1-800-998-8800, www.maxim-ic.com