Intersil ISL97519IUZ-EVALZ Gebrauchsanweisung

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

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

AN1644.0

Application Note 1644

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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

2AN1644.0

July 1, 2011

Board Design Schematic

FIGURE 1. SCHEMATIC

ISL97519

Application Note 1644

3AN1644.0

July 1, 2011

Evaluation Board Layout

FIGURE 2. EVB ASSEMBLY LAYER

Application Note 1644

4AN1644.0

July 1, 2011

FIGURE 3. TOP LAYER

Evaluation Board Layout (Continued)

Application Note 1644

5AN1644.0

July 1, 2011

FIGURE 4. BOTTOM LAYER

Evaluation Board Layout (Continued)

Application Note 1644

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

AN1644.0

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

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