ISL6310EVAL1Z Intersil, ISL6310EVAL1Z Datasheet - Page 9

• Manufacturer Part Number: ISL6310EVAL1Z
• Description: EVALUATION BOARD FOR ISL6310
• Manufacturer: Intersil

Specifications of ISL6310EVAL1Z

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.5V
• Current - Output: 60A
• Voltage - Input: 5 ~ 12V
• Regulator Topology: Buck
• Frequency - Switching: 400kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ISL6310
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

Down-Converting From a Different Input Voltage
The ISL6310EVAL1Z is powered from bench supplies, the
input labeled ‘+12V’ can be adjusted down as desired. If
experimenting with a lower voltage, be mindful of a few
aspects:
• The duty cycle of the controller is limited to 66%; the
• The input-RMS current will likely increase as the input
• As the evaluation board (as shipped) was not optimized
• The reduced input voltage will decrease the amount of
• The Evaluation Board (as shipped) have the +12V is
circuit will not be capable of properly regulating the output
voltage should the input be reduced to a level low enough
to induce duty cycle saturation
voltage is decreased; maximum will occur at duty cycles
around 25% for the two-phase and to 50% for single-
phase.
for high duty cycle operation, closely monitor the board
temperatures and increase the output current only as
allowed by the board thermal behavior
loop gain the modulator provides in the feedback loop, as
a result, expect a more sluggish transient response when
operating the board at reduced down-conversion voltage
connected as the input to be down-converted and
provides gate drive bias (PVCC). Since PVCC can
assume any value between +5 and +12V, the Input can be
reduced only to 5V. If a lower input voltage is desired, the
PVCC voltage should be provided by a separate supply
whose value does not drop below +5V. The VCC bias
supply can be used in this case (Consult the section
entitled “PVCC Power Options” on page 2 for more details
on how this can be accomplished)
9
Application Note 1197
Summary
The ISL6310EVAL1Z evaluation board showcases a highly
integrated approach to providing control in a wide variety of
applications. The sophisticated feature set and high-current
MOSFET drivers of the ISL6310 yield a highly efficient
power conversion solution with a reduced number of
external components in a compact footprint. The following
pages provide a board schematic, bill of materials and layout
drawings to support implementation of this solution. Refer to
the ISL6310 data sheet for detailed layout instructions.
References
Intersil documents are available on the web at
www.intersil.com.
[1] ISL6310 Data Sheet, Intersil Corporation, File No.
FN9209
December 12, 2006
AN1197.1