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2-Phase/1-Phase, QuickTune-PWM Controller with Serial I²C Interface

ARM Core VR Solution and General I²C Controller

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 24
VOUT1 (V) (min) 0
VOUT1 (V) (max) 1.76
IOUT1 (A) (max) 40
Switch Type External
Preset VOUT (V) 1
Output Adjust. Method Digital/VID
Power Good Signal Yes
# DC-DC Outputs 1
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
3.07
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 24
VOUT1 (V) (min) 0
VOUT1 (V) (max) 1.76
IOUT1 (A) (max) 40
Switch Type External
Preset VOUT (V) 1
Output Adjust. Method Digital/VID
Power Good Signal Yes
# DC-DC Outputs 1
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
3.07

Key Features

  • 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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX15569: Typical Application Circuit (with MAX15492 Driver and MOSFET) MAX15569: Typical Application Circuit (with MAX15492 Driver and MOSFET) Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .