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ISL6224 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 ISL6224
部品説明 Single Output Mobile-Friendly PWM Controller
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 



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ISL6224 Datasheet, ISL6224 PDF,ピン配置, 機能
®
Data Sheet
October 2003
ISL6224
FN9042.5
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
by using MOSFET’s RDS(ON) as a current sense
component. 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.
Ordering Information
PART NUMBER TEMP. (oC) PACKAGE PKG. DWG. #
ISL6224CA
-10 to 85 16 Ld SSOP M16.15A
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
- Uses MOSFET’s RDS(ON)
- Optional current sense method higher precision
• Supply operation mode
- Wide VIN range: 4V–24V
- 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
Applications
Mobile PCs
• Graphic cards
• Hand-held portable instruments
Related Literature
• Application Note AN9983
Pinout
ISL6224 (SSOP)
VIN 1
PGOOD
EN
OCSET
2
3
4
VOUT 5
VSEN 6
SOFT 7
GND 8
16 FCCM
15 BOOT
14 UGATE
13 PHASE
12 ISEN
11 VCC
10 LGATE
9 PGND
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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