DC/DC Converters

DC/DC Converters are a family of high efficiency products that power mobile and desktop PCs. Products offered are:

• Mobile CPU core power controller chipset (OZ820/OZ821)
• Server CPU core power controller (OZ830)

The OZ820/821 chipset is specially designed for next generation portable computing microprocessors. It's an IMVP (Intel^® Mobile Voltage Positioning) compliant solution that provides processor core and peripheral voltages using one controller IC. The architecture allows flexible PCB layout possibilities, while isolating high power driver circuitry away from complex temperature-sensitive controller and reference circuitry.

OZ830 is designed for high-speed DC/DC power conversion, useful for powering high wattage desktop and server microprocessors. This architecture provides high currents, while utilizing a lower number of power delivery phases (less external components) than other modern multi-phase, high current power solutions. The OZ830 can provide well over 60A, while requiring only 2-phases for power delivery.

FEATURES (OZ820)

• Triple output voltage controller with Fast-PWM Architecture
  • VCC_CORE (dual phase)
  • VCCP (1 phase)
  • VCC_MCH (1 phase)
• Core supply: >80% efficiency @ 0.1A load
• Precision current balancing circuit guarantees a current difference between phases of <10% at full load for VCC_CORE
• Slew rate control of VCC_CORE, VCCP, and VCC_MCH at startup, shutdown and on the fly
• +0.5% output voltage accuracy
• 0.5% reference voltage
• Latched over voltage and over current output protections
• High efficiency, up to 94%
• 48 QFP package

FEATURES (OZ821)

• High peak output current
• Drives N-channel MOSFETs
• Adaptive Break-Before-Make (BBM)
• Under-Voltage-Lock-Out (UVLO)
• 15ns typical internal delay
• 25V floating capability of LX pin
• 16 QFN package

FEATURES (OZ830)

• Fast-PWM Architecture
• Dual Output Current-Doubling Synchronous DC/DC Controller
• True Remote Sensing Differential Amplifier
• Precision current balancing
• Over current protection
• High efficiency, up to 90%
• 32 QFN package

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