an1472

Application Note 1472
ISL97516IUZEVALZ Evaluation Board Application
Manual
Description
Quick Setup Guide
The ISL97516IUZEVALZ evaluation board is an evaluation kit
for evaluating the ISL97516, a step-up voltage regulator that
operates with high frequency and high efficiency. This
evaluation kit is designed to deliver over 90% efficiency.
1. Connect power supply between headers of VIN and GND.
The positive output of the power supply should be
connected to VIN header. Set power supply voltage between
2.3V and 5V, and current limit at 3A.
The ISL97516IUZEVALZ kit provides a dip switch that allows
users to select either 620kHz or 1.2MHz switching frequency.
2. Connect E-load between headers of VOUT and GND. The
positive input of the E-load should be connected to VOUT
header. Set E-load current. The load current should not
exceed the maximum output current the part can supply.
Key Features
• A Complete evaluation platform for ISL97516 evaluation
• Input voltage: 2.3V to 5.5V
4. Close pins 2 and 3 of S1 to tie EN pin to VIN to enable the
part. To disable the part, open pins 2 and 3 to pull EN to
ground with R3 to disable the part.
• Proven evaluation board layout
• Pb-free (RoHS compliant)
What is Needed
The following instruments will be needed to perform testing:
• Power supplies
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
• DC electronic load
The MOSFET current limit is normally 2.0A and guaranteed
1.7A. This restricts the maximum output current that the
ISL97516 can drive. Table 1 shows the ISL97516EVAL1Z
maximum output current, IOMAX in different input and output
voltages.
• Multimeters
• Oscilloscope
• Cables and wires
Pin Configuration
TABLE 1. TYPICAL MAXIMUM IOUT VALUES
ISL97516
(8 LD ΜSOP)
TOP VIEW
COMP 1
8 SS
VIN
(V)
VOUT
(V)
IOMAX
(mA)
2.5
5
870
2.5
9
500
FB 2
7 FSEL
2.5
12
380
EN 3
6 VDD
3.3
5
1150
5 LX
3.3
9
655
3.3
12
500
5
9
990
5
12
750
GND 4
Ordering Information
PART NUMBER
DESCRIPTION
ISL97516IUZEVALZ
Evaluation Board for ISL97516
October 17, 2012
AN1472.1
3. Close pins 1 and 4 of S1 to tie FSEL pin to VIN. This will set
the switching frequency to 1.2MHz. Open pins 1 and 4 to
pull FSEL to ground with R4 to set 620kHz.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2009, 2012. All Rights Reserved.
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Application Note 1472
Board Design Schematic
R4
10k
S1
1
2
4
3
R5
10k
4700pF
C6
1k
R3
ISL97516
1
2
10k
R2
3
R1
85.2k
4
SW DIP-2
C4
COMP
SS
FSEL
FB
EN
VDD
LX
GND
VOUT (12V)
8
27nF
7
C2
0.1µF
6
C1
22µF
VIN (2.3V TO 5.5V)
1
5
CON1
D1
L1
1
10µH
C3
22µF
CON1
SS25
GND IN
1
CON1
FIGURE 1. SCHEMATIC
TABLE 2. ISL97516IUZEVALZ BILL OF MATERIALS (BOM)
ITEM
QTY
REFERENCE
PART DESCRIPTION
PCB FOOTPRINT
1
1
C4
27nF
603
TDK
2
1
C6
4700pF
603
TDK
3
1
C2
0.1µF/16V
603
4
1
R1
85.2k
603
5
3
R2, R4, R5
10k
603
6
1
R3
1k
603
8
1
C3
22µF
1206
9
1
C1
22µF
1206
10
1
L1
10µH
CDRH8D43-100NC
11
1
U1
ISL97516
MSOP-8
12
1
VOUT (12V)
CON1
Powerpost
13
1
VIN (3.3V)
CON1
Powerpost
14
1
GND IN
CON1
Powerpost
15
1
D1
SS25
DO-214A
16
1
S1
SWDIP-2
DIP4
2
PART NUMBER
C1068X7R1H104K
VENDOR
TDK
WALSIN
WR06W1002JTL
WALSIN
MURATA
GRM31CR61C226KE15L
MURATA
CDRH8D43-100NC
SUMIDA
ISL97516
INTERSIL
SS25
Fairchild
CKN3001-ND
AN1472.1
October 17, 2012
Application Note 1472
PCB Layout
FIGURE 1. EVALUATION BOARD ASSEMBLY LAYER
FIGURE 2. TOP LAYER
3
AN1472.1
October 17, 2012
Application Note 1472
PCB Layout
(Continued)
FIGURE 3. BOTTOM LAYER
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is
cautioned to verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
4
AN1472.1
October 17, 2012
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