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Application Note 1645
ISL97519A Evaluation Board Application Manual
Description
Quick Setup Guide
The ISL97519AIUZ-EVALZ evaluation board is an evaluation kit
for evaluating the ISL97519AIUZ-EVALZ, a step-up voltage
regulator that operates with high frequency and high
efficiency. This evaluation kit is designed to deliver over 90%
efficiency.
Step 1: Connect the power supply between the headers of VIN
and GND. The positive output of the power supply
should be connected to the VIN header. Set the power
supply voltage between 2.3V and 5V, and the current
limit at 3A.
The ISL97519AIUZ-EVALZ kit provides a dip switch that allows
users to select either 600kHz or 1.2MHz switching frequency.
Step 2: Connect the E-load between the headers of VOUT and
GND. The positive input of the E-load should be
connected to the VOUT header. Set the E-load current.
The load current should not exceed the maximum
output current that the part can supply.
Key Features
• A Complete Evaluation Platform for Evaluation of ISL97519A
• Input Voltage: 2.3V to 5.5V
• Proven Evaluation Board Layout
• Pb-free (RoHS Compliant)
Step 4: Close pins 2 and 3 of S1 to tie the EN pin to VIN in order
to enable the part. To disable the part, open pins 2 and
3 in order to pull EN to ground with R3 to disable the
part.
Pin Configuration
ISL97519A
(8 LD MSOP)
TOP VIEW
COMP 1
Make sure all the connections on the evaluation board are
correct, then turn on the power supply and E-load. The part will
start to operate.
8 SS
FB 2
7 FSEL
EN 3
6 VDD
GND 4
Maximum Output Current
The MOSFET current limit is normally 2.0A and guaranteed at
1.7A. This restricts the maximum output current that the
ISL97519A can drive. Table 1 shows the ISL97519AIUZ-EVALZ
maximum output current, IOMAX at different input and output
voltages.
5 LX
Ordering Information
PART #
ISL97519AIUZ-EVALZ
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TABLE 1. TYPICAL MAXIMUM OUTPUT CURRENT
DESCRIPTION
Evaluation Board for ISL97519A
1
Step 3: Close pins 1 and 4 of S1 to tie the 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 the
frequency to 600kHz.
VIN
(V)
VOUT
(V)
IOMAX
(mA)
2.5
5
870
2.5
9
500
2.5
12
380
3.3
5
1150
3.3
9
655
3.3
12
500
5
9
990
5
12
750
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. 2011. 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 1645
Board Design Schematic
FIGURE 1. SCHEMATIC
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Application Note 1645
Evaluation Board Layout
FIGURE 2. EVB ASSEMBLY LAYER
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Application Note 1645
Evaluation Board Layout (Continued)
FIGURE 3. TOP LAYER
4
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Evaluation Board Layout (Continued)
FIGURE 4. BOTTOM LAYER
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Application Note 1645
TABLE 2. ISL97519AIUZEVALZ BILL OF MATERIALS (BOM)
ITEM
QTY
REFERENCE
PART DESCRIPTION
PCB FOOTPRINT
PART NUMBER
1
1
C4
27nF
603
TDK
2
1
C6
4700nF
603
TDK
3
1
C2
0.1µF/16V
603
4
1
R1
86.6k
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
10µF
CDRH8D43-100NC
11
1
U1
ISL97519A
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
C1068X7R1H104K
VENDOR
TDK
WALSIN
WR06W1002JTL
WALSIN
MURATA
GRM31CR61C226KE15L
MURATA
SUMIDA
ISL97519A
INTERSIL
SS25
Fairchild
CKN3001-ND
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
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