ISL6443AEVAL2Z Intersil, ISL6443AEVAL2Z Datasheet

ISL6443AEVAL2Z

Manufacturer Part Number

ISL6443AEVAL2Z

Description

EVALUATION BOARD FOR ISL6443A

Manufacturer

Intersil

Datasheets

1.ISL6443AIRZ.pdf (19 pages)

2.ISL6443AEVAL2Z.pdf (4 pages)

Specifications of ISL6443AEVAL2Z

Main Purpose

DC/DC, Step Down with LDO

Outputs And Type

3, Non-Isolated

Voltage - Output

1.8V, 3.3V, 1.2V

Current - Output

2A, 2A, 200mA

Voltage - Input

12V

Regulator Topology

Buck

Frequency - Switching

300kHz

Board Type

Fully Populated

Utilized Ic / Part

ISL6443A

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL6443AEVAL2Z

Manufacturer:

Intersil

Quantity:

Current page: 1 of 4
Download datasheet (409Kb)

Using the Evaluation Board

The ISL6443A is a high performance triple-output controller

offering control and protection features for 2 synchronous

buck PWMs and 1 linear regulator.

The ISL6443A evaluation board highlights the operation of

the IC in an embedded DC/DC converter application. Table 1

shows the available evaluation board.

Recommended Test Equipment

• A 12V, 5A capable power supply

• An electronic load

• Four channel oscilloscope with probes

• Precision digital multimeters

Power and Load Connections

Input Voltage

To connect a +12V power supply to the evaluation board,

connect the positive lead of the power supply to the VIN (P1)

post and the ground lead of the supply to the GND (P2) post.

The input voltage to the linear controller is already taken

from the 1.8V output of V

Output Adjustment

Change the respective output voltage feedback resistors to

modify the output voltage using Equation 1:

Soft-Start and Shutdown

The soft-start capacitors can be adjusted for sequencing of

the output voltages, PWM start-up tracking, and/or to adjust

the start-up current required to charge the output capacitors.

To independently shutdown the PWMs, the SD1 or SD2 pin

can be pulled to GND using the on-board posts, P9 and P10

respectively.

ISL6443AEVAL2Z

SS PWM1

OUT1

OUT3

(

BOARD NAME

0.8

)

0.8

⋅

TABLE 1. EVALUATION BOARDS

⎛

⎜

⎝

⎛

⎜

⎝

⋅

0.8V

------------

5μA

------ -

--------- -

⎞

⎟

⎠

⎞

⎟

⎠

ISL6443AIRZ

OUT2.

SS PWM2

OUT2

Application Note

(

Using the ISL6443AEVAL2Z Evaluation Board

28 Ld QFN

)

0.8

PACKAGE

⋅

⎛

⎜

⎝

⋅

0.8V

------------

5μA

------ -

(EQ. 1)

(EQ. 2)

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

⎞

⎟

⎠

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

Power Good

When both PWMs are within ±10% of their set value and the

linear regulator output is within 75% of its set value, the

PGOOD signal will go high. The open drain PGOOD pin is

pulled HIGH to VCC_5V on the board. The PGOOD circuitry

monitors the FBx pin of each regulated output to determine if

the outputs are in regulation. PGOOD can be monitored at

post P8.

Overcurrent Protection

The overcurrent thresholds can be adjusted on the

ISL6443A evaluation board. The current sense resistors,

95.3kΩ. The overcurrent trip point can be adjusted by

modifying R

sense resistor, I

MOSFET. Refer to the ISL6443A Data Sheet for more

information on how to select the current sense and

overcurrent select resistors.

SENSE

DS(ON)

OCSET

March 10, 2008

, are set at 1.0kΩ. The overcurrent set resistor is

is the ON-resistance of the respective PWM’s lower

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

is the overcurrent set resistor, R

------------------------------------ -

OCSET

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

7 R

⋅

DS ON

, R

is the desired overcurrent trip point, and

(

and R

)

is the current

AN1391.0

(EQ. 3)

Related parts for ISL6443AEVAL2Z

ISL6443AEVAL2Z Summary of contents

Page 1

... To independently shutdown the PWMs, the SD1 or SD2 pin can be pulled to GND using the on-board posts, P9 and P10 respectively. 1 Using the ISL6443AEVAL2Z Evaluation Board March 10, 2008 Power Good When both PWMs are within ±10% of their set value and the linear regulator output is within 75% of its set value, the PGOOD signal will go high ...

Page 2

... ISL6443AEVAL2Z Schematic P1 P1 +12V +12V +12V P2 P2 GND GND GND P11 P11 PGOOD PGOOD PGOOD C7 C7 0.1uF 0.1uF +3.3V +3.3V DO3316P-682ML DO3316P-682ML +3.3V, 2A 6.8uH, 27mOhm 6.8uH, 27mOhm P4 P4 GND GND R1 R1 C31 C31 1K 1K 10TPB220M 10TPB220M GND 220uF, 10V, 40mOhm 220uF, 10V, 40mOhm ...

Page 3

... ISL6443AEVAL2Z Bill of Materials ITEM REFERENCE QTY P12 C30, C31 2 5 C20, C21 C32 1 12 C33, C34 R1, R3, R6, R7 R11 R5, R10 1 18 R12 ISL6443AEVAL2Z Layout ISL6443AEVAL2Z ISL6443AEVAL2Z FIGURE 1. TOP SILK 3 Application Note 1391 PART NUMBER PART TYPE 1514-2 ...

Page 4

... ISL6443AEVAL2Z Layout (Continued) FIGURE 3. LAYER 2 FIGURE 5. BOTTOM LAYER 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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