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ISL97656IRTZEVALZ Evaluation Board
Application Manual
Description
The ISL97656IRTZEVALZ is an evaluation kit for evaluating
the ISL97656, a step-up voltage regulator that operates with
high frequency and high efficiency. This evaluation kit is
designed to deliver up to 2A output current for portable
equipment and TFT-LCD display.
The ISL97656IRTZEVALZ evaluation kit provides a dip
switch that allows users to select either 620kHz or 1.2MHz
frequency.
Key Features
• A Complete Evaluation Platform for the ISL97656
Evaluation
• Input Voltage: 2.3V to 5.5V
• Proven Evaluation Board Layout
• Pb-Free (RoHS Compliant)
What is Needed
The following instruments will be needed to perform testing:
• Power Supplies
• DC Electronic Load
• Multimeters
• Oscilloscope
• Cables and Wires
Pinout
ISL97656
(10L
Μ
TDFN)
TOP VIEW
Quick Setup Guide
1. Connect power supply between headers of V
IN
and
V
IN_GND
. The positive output of the power supply should
be connected to V
IN
header. Set power supply voltage
between 2.3V and 5V, and current limit at 4A.
2. Connect E-load between headers of V
OUT
and
OUT_GND. The positive input of the E-load should be
connected to V
OUT
header. Set E-load current. The load
current should not exceed the maximum output current in
Table 1.
3. Close pins 1 and 4 of S1 to tie FREQ pin to V
IN
to set
1.25MHz switching frequency. Open pins 1 and 4 to pull
FREQ to ground with R
4
to set 620kHz.
4. Close pins 2 and 3 of S1 to tie EN pin to V
IN
to enable the
part. Open pins 2 and 3 to pull EN to ground with R
3
to
disable the part.
5. Make sure all the connections on the evaluation board
are correct, then turn on power supply and E-load. The
part starts to operate.
Maximum Output Current
The MOSFET current limit is normally 4A and guaranteed
3.8A. This restricts the maximum output current that the
ISL97656 can drive.Table 1 shows typical maximum I
OUT
values for 1.2MHz switching frequency and 10µH inductor.
Ordering Information
PART NUMBER
DESCRIPTION
ISL97656IRTZEVALZ
Evaluation Board for ISL97656
2
3
4
1
9
8
7
10
COMP
FB
EN
GND
SS
FREQ
IN
LX
5
6
LX
GND
TABLE 1. TYPICAL MAXIMUM I
OUT
VALUES
V
IN
(V)
V
OUT
(V)
I
OMAX
(mA)
2.5
5
1790
2.5
9
990
2.5
12
750
3.3
5
2370
3.3
9
1300
3.3
12
970
5
9
1970
5
12
1470
Application Note
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2009, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
AN1473.1
May 10, 2010
