The MAX1544/MAX1545 evaluation kits (EV kits)
demonstrate the high-power, dynamically adjustable
multiphase notebook CPU application circuit. This DC-DC
converter steps down high-voltage batteries and/or AC
adapters, generating a precision, low-voltage CPU core
VCC rail. The MAX1544 EV kit meets the mobile and
desktop AMD Hammer™ CPU transient voltage
specification. The MAX1545 EV kit meets the desktop and
mobile Pentium® 4 (P4) CPUs transient voltage
specification. The MAX1544/MAX1545 kits consist of the
MAX1544 or MAX1545 Dual-Phase Quick-PWM™ stepdown
controller, two MAX1980 slave controllers and the
MAX6590 temperature sensor. The MAX1544/MAX1545
kits include active voltage positioning with adjustable gain
and offset, reducing power dissipation and bulk output
capacitance requirements. The kit features independent
four-level logic inputs for setting the suspend voltage
(S0/S1).
The MAX1980 provides additional gate drive circuitry,
phase synchronization, current limit, and current
balancing. Precision slew-rate control provides "just-in
time" arrival at the new DAC setting, minimizing surge
currents to and from the battery.
This fully assembled and tested circuit board provides a 5-
bit digitally adjustable output voltage from a 7V to 24V
battery input range. The EV kit operates at 300kHz
switching frequency and has superior line- and load transient
response.
Key Features
Applications/Uses
Quad-Phase Quick-PWM EV Kit
Mobile and Desktop P4 or AMD Hammer
Compatible
Active Voltage Positioning with Adjustable Gain,
Offset and Remote Sensing
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