Intersil ISL97519IUZ-EVALZ Instructions for use

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ISL97519 Evaluation Board Application Manual
Description
The ISL97519IUZ-EVALZ evaluation board is an evaluation kit
for evaluating the ISL97519IUZ-EVALZ, a step-up voltage
regulator that operates with high frequency and high
efficiency. This evaluation kit is designed to deliver over 90%
efficiency.
The ISL97519IUZ-EVALZ kit provides a dip switch that allows
users to select either 600kHz or 1.2MHz switching frequency.
Key Features
• A Complete Evaluation Platform for Evaluation of ISL97519
• Input Voltage: 2.3V to 5.5V
• Proven Evaluation Board Layout
• Pb-free (RoHS Compliant)
Pin Configuration
ISL97519
(8 LD MSOP)
TOP VIEW
Ordering Information
Quick Setup Guide
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.
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.
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.
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.
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.
Maximum Output Current
The MOSFET current limit is normally 2.0A and guaranteed at
1.7A. This restricts the maximum output current that the
ISL97519 can drive. Table 1 shows the ISL97519IUZ-EVALZ
maximum output current, IOMAX at different input and output
voltages.
PART # DESCRIPTION
ISL97519IUZ-EVALZ Evaluation Board for ISL97519
FB FSEL
EN VDD
GND LX
COMP SS
1
2
3
4
8
7
6
5
TABLE 1. TYPICAL MAXIMUM OUTPUT CURRENT
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
July 1, 2011
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Application Note 1644
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 1644
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Board Design Schematic
FIGURE 1. SCHEMATIC
ISL97519

Application Note 1644
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Evaluation Board Layout
FIGURE 2. EVB ASSEMBLY LAYER

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FIGURE 3. TOP LAYER
Evaluation Board Layout (Continued)

Application Note 1644
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FIGURE 4. BOTTOM LAYER
Evaluation Board Layout (Continued)

Application Note 1644
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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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July 1, 2011
TABLE 2. ISL97519IUZEVALZ BILL OF MATERIALS (BOM)
ITEM QTY REFERENCE PART DESCRIPTION PCB FOOTPRINT PART NUMBER VENDOR
1 1 C4 27nF 603 TDK
2 1 C6 4700nF 603 TDK
3 1 C2 0.1µF/16V 603 C1068X7R1H104K TDK
4 1 R1 85.2k 603 WALSIN
5 3 R2, R4, R5 10k 603 WR06W1002JTL WALSIN
6 1 R3 1k 603
8 1 C3 22µF 1206 MURATA
9 1 C1 22µF 1206 GRM31CR61C226KE15L MURATA
10 1 L1 10µF CDRH8D43-100NC SUMIDA
11 1 U1 ISL97519 MSOP-8 ISL97519 INTERSIL
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 SS25 Fairchild
16 1 S1 SWDIP-2 DIP4 CKN3001-ND