ISL9105EVAL1Z Intersil, ISL9105EVAL1Z Datasheet

ISL9105EVAL1Z

Manufacturer Part Number

ISL9105EVAL1Z

Description

Power Management IC Development Tools ISL9105 EVALUATION BOARD 1 - RoHS COMPLIANT - DFN

Manufacturer

Intersil

Type

DC/DC Converters, Regulators & Controllersr

Datasheet

1.ISL9105EVAL1Z.pdf (3 pages)

Specifications of ISL9105EVAL1Z

Rohs

yes

Product

Evaluation Kits

Tool Is For Evaluation Of

ISL9105

Input Voltage

2.7 V to 5.5 V

Output Voltage

1.6 V

For Use With

ISL9105

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Description

The ISL9105EVAL1Z is an evaluation kit for the ISL9105

1.6MHz 600mA low quiescent current, high efficiency

integrated step-down regulator. The ISL9105 is capable of

delivering up to 600mA output current with an output voltage

range of 0.8V to ~V

voltage divider resistors of R

default output voltage is set to be 1.6V on the evaluation

board and can be modified by changing the R

The complete ISL9105 regulator is located at the center of

the board. On the left side of the board are the connectors

for the input power source (J1 VIN; J2 GND). The output

connectors are located on the right side (J4 VO; J5 GND).

The other two test points are for the POR (J3) and RSI (J6)

signals respectively, as labelled on the board. The RSI input

needs either be driven to a low or a high logic input (Please

refer to the ISL9105 datasheet, FN6415 for more details

regarding RSI function). Do not leave the RSI input signal

floating. The open-drain POR signal is pulled up to the V

through a 100kΩ resistor (R

to enable or disable the IC. Jumper JP2 is the mode

selection input. Do not leave the EN or the MODE signal

floating. The evaluation board also offers one oscilloscope

probe tip connector connected to PHASE pin to minimize the

switching noise during the evaluation. One test point

(labeled as FB) is connected to the FB pin on the board in

order to monitor the FB voltage.

The evaluation board schematic, layout and bill-of-materials

(BOM) can be found at the end of this application note.

Ordering Information

Pinout

ISL9105EVAL1Z

PART NUMBER

MODE

POR

VIN

Evaluation Board for ISL9105

. The output voltage is set by two

TOP VIEW

8 LD DFN

ISL9105

). Jumper JP1 allows the user

and R

DESCRIPTION

Application Note

on the board. The

PHASE

GND

RSI

value.

1-888-INTERSIL or 1-888-468-3774

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

ISL9105EVAL1Z Evaluation Board

Features

• A Complete Evaluation Platform for ISL9105

• Convenient Jumpers for Enable/Disable, Operation Mode

• 2.0x1.6 Square Inches Board Size Handy for Evaluation

• Pb-Free Plus Anneal Available (RoHS Compliant)

What is Needed

The following instruments will be needed to perform testing:

• Power supplies: DC 10V/1A

• DC Electronic load: 10V/1A

• Multimeters

• Function generator

• Oscilloscope

• Cables and wires

Specifications

Table 1 shows the recommended operation conditions for

using the ISL9105EVAL1Z.

NOTE: The output voltage can be set to other values by changing

the R

Evaluation Board Setup

The following are steps for setting up the evaluation board:

Input Voltage

Output Voltage (Note)

Maximum Output Current

1. Connect Jumper JP1 at the position of “Enable” to enable

2. Connect Jumper JP2 either at the position of “SKIP” or

3. Connect the RSI input to either ground or VIN. Do not

4. Connect a DC power supply with voltage range of 2.7V to

5. Connect the output to a load (resistor or electronic load).

6. Turn on the input power supply and evaluate the device.

Selection

the device. Connect JP1 at the position of “Disable“ will

disable the device.

“Forced PWM”. With JP2 connected at the position of

“SKIP”, the device enters skip mode under light load

condition; with JP2 connected at the position of

“FORCED PWM”, the device always operates under

PWM mode regardless of the load condition.

leave it floating. Please refer to the ISL9105 datasheet,

FN6415 for more details regarding the function of RSI.

~ 5.5V to VIN (J1) and GND (J2) connectors. Make sure

the power supply has enough supply current capability.

Do not adjust the V

maximum supply voltage (5.5V).

TABLE 1. RECOMMENDED OPERATION CONDITIONS

value, V

PARAMETER

August 3, 2007

All other trademarks mentioned are the property of their respective owners.

Intersil (and design) is a registered trademark of Intersil Americas Inc.

OUT

= 0.8V*(1+R

Application Manual

higher than the recommended

MIN

600

2.7

TYP

1.6

MAX

AN1346.0

5.5

UNIT

Related parts for ISL9105EVAL1Z

ISL9105EVAL1Z Summary of contents

Page 1

... Application Note Description The ISL9105EVAL1Z is an evaluation kit for the ISL9105 1.6MHz 600mA low quiescent current, high efficiency integrated step-down regulator. The ISL9105 is capable of delivering up to 600mA output current with an output voltage range of 0. The output voltage is set by two IN voltage divider resistors of R and R on the board ...

Page 2

... ENABLE DISABLE SKIP FORCED PWM FIGURE 1. ISL9105EVAL1Z PCB TP1 PHASE VIN PHASE TP2 GND POR MODE RSI ISL9105 2 2 JP2 FIGURE 2. ISL9105EVAL1Z SCHEMATIC 4.7µ 100k 4.7µF/6.3V R3 100k J6 RSI E-LOAD GND AN1346.0 August 3, 2007 ...

Page 3

... ISL9105EVAL1Z Bill of Materials (BOM) ITEM QTY REFERENCE ISL9105 Capacitor, SMD, 10µF/6.3V, 10%, X5R Capacitor, SMD, 4.7µF/6.3V, 10%, X5R Capacitor, not populated 5 3 R1, R2, R3 100kΩ,1%, SMD Resistor Inductor, 4.7µ J1-J6 Turrent Terminal Pin 8 1 TP1 Scope Probe Test Point ...

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