Analog Devices MAX15569 Product Info

• Multiphase Controller Maximizes Processor Performance
  • 2-Phase QuickTune-PWM CPU Core Regulator
  • Output-Voltage Control
  • Active Load-Line Amplifier with Adjustable Gain
  • ±5mV FB Accuracy Over Line and Load
  • Programmable Slew Rate and Soft-Start
  • Accurate Current Balance and Current Limit
  • True Differential Remote Output Sense
  • 8-Bit ADC Digitizes Current Sense to Store in Current Monitor Register
• Transient Phase Overlap Reduces Output Capacitance
• Programmable Functionality Allows Optimized Design Performance
  • Programmable 300kHz to 1400kHz Switching Frequency
  • Programmable Soft-Shutdown (2kΩ Discharge Switch)
  • I²C Serial-Interface Control
• Robust Protection for Reliable Operation
  • Overcurrent, Output-Voltage Overrange, Overvoltage, Undervoltage, and Thermal-Fault Protection
  • System Status Register
  • Multifunction Active-Low INT Output
  • 4.5V to 24V Battery Input Range

The MAX15569 step-down controller consists of one multiphase regulator. The multiphase CPU regulator uses Maxim’s unique 2-phase QuickTune-PWM constant “on-time” architecture. The 2-phase CPU regulator runs 180° out-of-phase for true interleaved operation, minimizing input capacitance.

The device’s VR is controlled by writing appropriate data into a function-mapped register file. Output voltages are dynamically changed through a 2-wire, fast I²C interface (clock, data), allowing the switching regulator to be programmed to different voltages. A slew-rate controller allows controlled voltage transition and controlled soft-start. The regulator runs in a unique smart, low-power pulse-skipping-state algorithm for best efficiency over the full load range and the best transient response with respect to common pulse-skipping methods.

The device includes multiple fault-protection features: Output overvoltage protection (OVP), undervoltage protection (UVP), and thermal protection. When any of these fault-protection features detect a fault condition, the controller shuts down. A multifunction active-low INT output monitors output voltage, overcurrent (OC), overrange (VOUTMAX), and thermal faults (active-low VRHOT).

The controller has a programmable switching frequency, allowing 300kHz to 1400kHz per each phase of operation. The controller operates with a wide variety of drivers and MOSFETs, such as the MAX15492 MOSFET driver with standard MOSFETs, or with the power stage that integrates the drivers and MOSFETs together in a single device.

Applications

• ARM Core Power Supply
• Multiphase DC-DC Controllers
• Ultrabooks and Tablet Core Supply
• Voltage-Positioned Step-Down Converter