ISL8502EVAL1Z Intersil, ISL8502EVAL1Z Datasheet

ISL8502EVAL1Z

Manufacturer Part Number

ISL8502EVAL1Z

Description

EVALUATION BOARD FOR ISL8502

Manufacturer

Intersil

Datasheets

1.ISL8502IRZ-T.pdf (19 pages)

2.ISL8502EVAL1Z.pdf (8 pages)

Specifications of ISL8502EVAL1Z

Main Purpose

DC/DC, Step Down

Outputs And Type

2, Non-Isolated

Voltage - Output

2.5V, 2.5V

Current - Output

2.5A. 2.5A

Voltage - Input

4.5 ~ 14V

Regulator Topology

Buck

Frequency - Switching

500kHz

Board Type

Fully Populated

Utilized Ic / Part

ISL8502

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

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2.5A Synchronous Buck Regulator with

Integrated MOSFETs

The ISL8502 is a synchronous buck controller with internal

MOSFETs packaged in a small 4mmx4mm QFN package.

The ISL8502 can support a continuous load of 2.5A and has

a very wide input voltage range. With the switching

MOSFETs integrated into the IC, the complete regulator

footprint can be very small and provide a much more

efficient solution than a linear regulator.

The ISL8502 is capable of standalone operation or it can be

used in a master slave combination for multiple outputs that

are derived from the same input rail. Multiple slave channels

can be individually programmed such that the internal clocks

are out of phase. This method minimizes the ripple on the

input rail.

The switching PWM controller drives two internal N-Channel

MOSFETs in a synchronous-rectified buck converter

topology. The synchronous buck converter uses voltage-

mode control with fast transient response. The switching

regulator provides a maximum static regulation tolerance of

user-adjustable by means of external resistors down to 0.6V.

The output is monitored for undervoltage events. The

switching regulator also has over current protection. Thermal

shutdown is integrated. The ISL8502 features a bidirectional

Enable pin that allows the part to shut itself down and pull

the enable pin low at the same time.

Pinout

1% over line, load, and temperature ranges. The output is

PGOOD

SYNCH

SGND

M/S

(24 LD QFN)

TOP VIEW

ISL8502

GND

ISL8502EVAL1Z: 2.5A Synchronous Buck Regulator

Application Note

VIN

PHASE

PGND

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

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

Features

• 2.5A Continuous Output Current

• Integrated MOSFETs for Small Regulator Footprint

• Adjustable Switching Frequency, 500kHz to 1.2MHz

• Tight Output Voltage Regulation,

• Wide Input Voltage Range, 5V

• Wide Output Voltage Range, from 0.6V

• Simple Single-Loop Voltage-Mode PWM Control Design

• Input Voltage Feed-Forward for Constant Modulator Gain

• Fast PWM Converter Transient Response

• Lossless r

• Undervoltage Detection

• Integrated Thermal Shutdown Protection

• Power Good Indication

• Adjustable Soft-Start

• QFN Package

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Point of Load Applications

• Graphics Cards - GPU and Memory Supplies

• ASIC Power Supplies

• Embedded Processor and I/O Supplies

• DSP Supplies

Ordering Information

*Add “-T” suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100%

matte tin plate termination finish, which are RoHS compliant and

compatible with both SnPb and Pb-free soldering operations. Intersil

Pb-free products are MSL classified at Pb-free peak reflow

temperatures that meet or exceed the Pb-free requirements of

IPC/JEDEC J STD-020.

ISL8502IRZ*

(Note)

Protection

- Compliant to JEDEC PUB95 MO-220

- Near Chip Scale Package footprint, which improves

NUMBER

QFN (Quad Flat No Leads) package outline

PCB efficiency and has a thinner profile

PART

January 16, 2007

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

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

DS(ON)

with Integrated MOSFETs

MARKING

85 02IRZ -40 to +85 24 Ld 4x4 QFN

PART

High Side and Low Side Overcurrent

RANGE

TEMP.

(°C)

10% or 5.5V to 14V

(Pb-free)

1% Over Temperature

PACKAGE

AN1277.0

L24.4x4D

DWG. #

PKG.

Related parts for ISL8502EVAL1Z

ISL8502EVAL1Z Summary of contents

Page 1

... ISL8502EVAL1Z: 2.5A Synchronous Buck Regulator ® Application Note 2.5A Synchronous Buck Regulator with Integrated MOSFETs The ISL8502 is a synchronous buck controller with internal MOSFETs packaged in a small 4mmx4mm QFN package. The ISL8502 can support a continuous load of 2.5A and has a very wide input voltage range. With the switching ...

Page 2

What’s Inside The Evaluation Board Kit contains the following materials: • The ISL8502 EVAL REVD board • The ISL8502 datasheet • This EVAL KIT document Recommended Equipment The following materials are recommended to perform testing: • 15V power ...

Page 3

Schematic 2N7002 1 Q3 D100 2N7002 1 Q6 ENABLE ON OFF AND REG ...

Page 4

REF DES QTY VALUE TOL. C100A, C100B, 4 10µF 20% C200A, C200B C102, C202 2 0.1µF 10% C103, C203 2 1µF 20% C104, C204 2 100µF 20% C105, C205 2 22µF 20% C106, C206 2 OPEN - C107, C207 2 ...

Page 5

... TABLE 2. COMPONENT LIST (Continued) VOLTAGE PACKAGE PART NUMBER 100V SM0402 - - - IKN0403000 - - PAD_75 - QFN ISL8502 MANUFACTURER DESCRIPTION Generic Thick Film Chip Resistor APEM IK Series High Rel SPST SMT DIP Switch Generic 0.075 Pad with 0.036 Plated Thru Hole Intersil Synchronous Buck Regulator January 16, 2007 AN1277.0 ...

Page 6

ISL8502 EVAL Board Layout 6 Application Note 1277 FIGURE 1. TOP COMPONENTS FIGURE 2. TOP LAYER ETCH AN1277.0 January 16, 2007 ...

Page 7

ISL8502 EVAL Board Layout 7 Application Note 1277 (Continued) FIGURE 3. 2ND LAYER ETCH FIGURE 4. 3RD LAYER ETCH AN1277.0 January 16, 2007 ...

Page 8

... ISL8502 EVAL Board Layout 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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