1

®

ISL6224

Single Output Mobile-Friendly PWM

Controller

The ISL6224 provides power control and protection for a single,

adjustable output voltage required to power chip-sets and

memory banks in high-performance notebooks and PDAs. This

output voltage is adjustable in the range from 0.9-5.5V.

The hysteretic or PWM controller regulates the output

voltage from battery voltages ranging from 4V to 24V.

Synchronous rectification and hysteretic operation at light

loads contribute to a high efficiency over a wide range of

input voltages and loads. Efficiency is even further enhanced

Feed-forward ramp modulation, average current mode

control and internal feed-back compensation provide fast

and firm handling of transients when powering advanced

chip sets.

Two-stage conversion using system 5V voltage is possible at

a higher frequency (600kHz) to minimize the output filter size.

The ISL6224 monitors the output voltage. A PGOOD (power

good) signal is issued when soft-start is completed and the

output is within ±10% of the set point.

A built-in overvoltage protection prevents output voltage

from going above 120% of the set point. Undervoltage

protection latches the chip off when the output drops below

70% of its setting value after soft-start sequence is

completed. The PWM controller’s overcurrent circuitry

monitors the output current by sensing the voltage drop

across the lower MOSFET. If higher precision sense

technique is required, an optional external current-sense

resistor may be used.

Features

• Adjustable output voltgage: 0.9-5.5V

• High efficiency over wide load range

- Higher efficiency in hysteretic mode at light load

• Lossless current sense scheme

- Optional current sense method higher precision

• Supply operation mode

- Single 5V system rail

• Input undervoltage lock-out on VCC pin(UVLO)

• Excellent dynamic response

- Combined voltage feed-forward and current mode

control

• Power-Good indicator

• 300/600kHz switching frequency

• Thermal shut-down

• Pb-Free Available (RoHS Compliant)

Applications

• Mobile PCs

• Graphic cards

• Hand-held portable instruments

Related Literature

• Application Note AN9983

Pinout

ISL6224 (SSOP)

TOP VIEW

Ordering Information

PART NUMBER

TEMP. (°C)

PACKAGE

PKG. DWG. #

ISL6224CA

-10 to 85

16 Ld SSOP

M16.15A

ISL6224CAZ

(Note 1)

-10 to 85

16 Ld SSOP

(Pb-free)

M16.15A

ISL6224CAZA

(Note 1)

-10 to 85

16 Ld SSOP

(Pb-free)

M16.15A

NOTE:

1. Intersil Pb-free 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.

2. Add “-T” for Tape and Reel.

EN

GND

ISEN

VCC

VSEN

LGATE

PGND

VIN

BOOT

UGATE

PHASE

PGOOD

14

13

12

11

10

9

1

2

3

4

5

6

7

8

SOFT

OCSET

15

16

VOUT

FCCM

FN9042.7

Data Sheet

December 28, 2004

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

1-888-INTERSIL or 321-724-7143

Copyright © Intersil Americas Inc. 2004. All Rights Reserved

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