The MAX8525 evaluation kit (EV kit) demonstrates the
high-power, dynamically adjustable multiphase VRM
10.0 application circuit. This DC-DC converter steps
down high-voltage input, generating a precision, lowvoltage
CPU-core VCC rail. The MAX8525 EV kit meets
the Intel® VRM 10 CPU's transient voltage specification
and includes logic-to-interface with the CPU powergood
signal. The MAX8525 EV kit consists of the
MAX8525 current-mode, step-down controller and the
MAX8523 high-speed, dual-phase MOSFET gate driver.
The MAX8525 EV kit includes rapid-active average current
sensing and voltage positioning, thereby reducing
power dissipation and bulk output-capacitance requirements.
Quad-phase operation reduces input-ripple-current
requirements and output voltage ripple.
The MAX8525 EV kit is a fully assembled and tested circuit
board that provides a digitally adjustable 0.8375V to
1.5875V output voltage range (6-bit, on-board DAC,
12.5mV increments) from a 12V input source. Each phase
delivers up to 25A output current for a total of 100A. The
EV kit operates at a 210kHz switching frequency and has
superior line- and load-transient responses. Two EV kits
can be paralleled for true 8-phase interleaved operation
up to 200A. The MAX8525 EV kit can easily be modified
to meet Intel's VRM 10.x requirements. Contact the factory
for details.
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