Intersil ISL97519IUZ-EVALZ Applications Manual

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
COMP
1
FB
2
EN 3
GND 4

Ordering Information

PART #
ISL97519IUZ-EVALZ
July 1, 2011
AN1644.0
SS
8
FSEL
7
6 VDD
5 LX
DESCRIPTION
Evaluation Board for ISL97519
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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, I
voltages.
TABLE 1. TYPICAL MAXIMUM OUTPUT CURRENT
V
IN
(V)
2.5
2.5
2.5
3.3
3.3
3.3
5
5
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Application Note 1644

at different input and output
OMAX
V I
OUT OMAX
(V) (mA)
5 870
9 500
12 380
5 1150
9 655
12 500
9 990
12 750
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