Analog Devices MAX42410 User Manual page 3

MAX42410 Evaluation Kit
Evaluation Board User Guide
Detailed Description of Hardware
This MAX42410 EV kit data sheet must be used with the MAX42408/MAX42410 IC data sheet.
The MAX42410 EV kit provides a proven layout for the MAX42408/MAX42410 synchronous buck regulator IC. The IC
accepts input voltages as high as 36V and delivers up to 10A. The EV kit can handle an input supply transient up to 42V.
Various test points are included for evaluation.
External Synchronization
The IC can operate in two modes: forced pulse-width modulation (FPWM) or skip mode. Skip mode has better efficiency
for light load conditions. When SYNC is pulled low, the IC operates in skip mode for light loads and FPWM mode for larger
loads. When SYNC is pulled high, the IC is forced to operate in FPWM mode across all load conditions. SYNC can be
used to synchronize with external clock if a clock source is present. The IC is forced to operate in FPWM mode when
SYNC is connected to a clock source.
Buck Output Monitoring (PGOOD)
The EV kit provides a power-good output test point (PGOOD) to monitor the status of the buck output (OUT). PGOOD is
pulled to high when the output is on regulation. It is pulled to ground when the output voltage drops below 7% (typ) of its
nominal regulated voltage.
Programming Buck Output Voltage
The EV kit comes installed with MAX42410AFOB+ (1.5MHz), which provides an adjustable 0.8V to 6V output voltage. To
program VOUT voltage, removing R5 and place appropriate resistors in the positions R7 and R8 according to the following
equation:
Equation 1:
��7 = ��8 × [( �� /�� ) − 1 ]
������ ����
Where typically V = 0.8V and R8 = 10kΩ.
FB
For C16 value, refer to the CFF (pF) column in Table 2. Recommended Component Selection of the
MAX42408/MAX42410 IC data sheet.
Evaluating Other Variants
The EV kit comes installed with a 1.5MHz, 10A variant (MAX42410AFOB+). A 400kHz, 10A (MAX42410AFOA+) variant
is also available on the board together with a corresponding inductor for 3V to 5V output voltage. The other variants can
be installed with minimal component changes.
Evaluation Data
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