MAX15569 Datasheet, PDF (1/41 Pages) Maxim Integrated Products – 2-Phase/1-Phase QuickTune-PWM Controller with Serial I2C Interface

MAX15569
EVALUATION KIT AVAILABLE
2-Phase/1-Phase QuickTune-PWM Controller
with Serial I²C Interface
General 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 volt-
ages are dynamically changed through a 2-wire, fast I²C
interface (clock, data), allowing the switching regula-
tor 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 pro-
tection (UVP), and thermal protection. When any of these
fault-protection features detect a fault condition, the con-
troller shuts down. A multifunction INT output monitors
output voltage, overcurrent (OC), overrange (VOUTMAX),
and thermal faults (VRHOT).
The controller has a programmable switching frequency,
allowing 300kHz to 1400kHz per each phase of opera-
tion. 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
● Ultrabooks and Tablet Core Supply
● Voltage-Positioned Step-Down Converter
● Multiphase DC-DC Controllers
Benefits and Features
● 2-Phase QuickTune-PWM CPU Core Regulator
• Transient Phase Overlap Reduces Output
Capacitance
● I²C Serial-Interface Control
• Output-Voltage Control
• System Status Register
• Current Monitor Register
● Multifunction INT Output
• Overcurrent, Output Voltage Overrange,
Overvoltage, Undervoltage, and Thermal Fault
Protection
● ±5mV FB Accuracy Over Line and Load
● 7-Bit DAC (0.5V to 1.6V, 10mV/LSB)
● True Differential Remote Output Sense
● Active Load-Line with Adjustable Gain
● Accurate Current Balance and Current Limit
● 4.5V to 24V Battery Input Range
● Programmable 300kHz to 1400kHz Switching
Frequency
● Programmable Slew Rate and Soft-Start
● Passive Soft-Shutdown (2kΩ Discharge Switch)
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX15569.related.
19-6646; Rev 0; 3/13