Sunnyvale, Calif—Maxim Integrated Products' MAX8760 is a dual-phase, step-down controller that (with external MOSFETs) powers up AMD 9G and AMD Hammer CPU cores.
The MAX8760 is intended for two types of CPU core applications: stepping down the battery directly, or stepping down a 5-volt system supply to create the core voltage. The chip's single-stage converter allows this device to directly step down high-voltage batteries at high efficiency. Alternatively, it uses a two-step conversion at a higher switching frequency (thus minimizing device size) to step down the 5-volt system supply. Compatible external MOSFET drivers include the MAX8702/MAX8703.
The MAX8760 features the company's Quick-PWM topology for fast response time, as well as soft-start, power-up sequencing, soft-shutdown, and independent four-level logic inputs for setting the suspend voltage. The switching regulator also includes output under-voltage protection, selectable over-voltage protection, thermal protection, and has a voltage regulator power-OK output. The chip's outputs operate out-of-phase to reduce input-current ripple and output-voltage ripple, thereby reducing the capacitance requirements. Active voltage-positioning with adjustable gain and offset reduces power dissipation as well as bulk output-capacitance requirements. A preliminary data sheet for this product is available at www.maxim-ic.com/PRGraphics/PRPDF/MAX8760DS.pdf
The MAX8760 is available in a 6-by-6 mm, 40-pin thin QFN
package. It is screened for the extended-industrial temperature range (-40 to +85°C). Prices start at $6.63 each (1000-up, FOB USA). A preassembled MAX8760EVKIT is available with recommended external components to reduce design time.
Maxim Integrated Products, 1-800-998-8800, www.maxim-ic.com