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Intersil Electronic Components Datasheet

ISL8118 Datasheet

Single-Phase PWM Controller

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®
Data Sheet
3.3V to 20V, Single-Phase PWM Controller
with Integrated 2A/4A MOSFET Drivers
The ISL8118 is a single-phase PWM controller featuring an
input voltage range of +3.3V to +20V and integrated MOSFET
drivers. Utilizing voltage-mode operation with input voltage
feed-forward compensation, the ISL8118 maintains a constant
loop gain, providing optimal transient response for applications
with a wide input operating voltage range.
The output voltage can be precisely regulated down to
0.591V with a system tolerance of ±0.85% over the
commercial temperature range and line and load variations.
A external reference input is provided to bypass the internal
reference for voltage tracking or DDR memory applications.
The compact 28 Ld 5x5 QFN package, integrated linear
regulator as well as the external linear regulator drive option,
integrated differential remote sense amplifier and integrated
voltage margining with adjustable upper and lower settings
decrease external component count and reduce board
space requirements.
Programmable soft-start with pre-biased load capability,
adjustable operating frequency from 250kHz to 2MHz,
sourcing and sinking overcurrent protection, overvoltage and
undervoltage protection, and power-good indication with
programmable delay combine to make the ISL8118 a
superior choice for many power supply systems.
Pinout
ISL8118
(28 LD 5x5 QFN)
TOP VIEW
28 27 26 25 24 23 22
VSENSP 1
21 BOOT
VSENSN 2
20 TGATE
REFOUT 3
REFIN 4
SS 5
GND
BOTTOM
SIDE PAD
19 LX
18 PGND
17 BGATE
OFSP 6
16 PVCC
OFSN 7
15 EXDRV
8 9 10 11 12 13 14
ISL8118
August 1, 2006
FN6325.0
Features
• Wide Input Voltage Range: +3.3V to +20V
• High-Speed 2A/4A MOSFET Gate Drivers That Operate
from 2.9V to 5.6V
• 0.591V Internal Reference
• External Reference Input
• Input Voltage Feed-forward Compensation
• Internal Linear Regulator
• External Linear Regulator Drive Available
• High System Accuracy:
- ±0.85% over the range of 0°C to +70°C
- ±1.25% over the range of -40°C to +85°C
• Programmable Operating Frequency from 250kHz to
2MHz
• Programmable Soft-Start with Pre-biased Load Capability
• Integrated Unity-Gain Differential Remote Sense Amplifier
• Enable Input with Voltage Monitoring Capability
• Integrated Voltage Margining with Independent Upper and
Lower Settings
• Overvoltage and Undervoltage Protection
• Low-Side and High-Side MOSFET Current Sensing
• Overcurrent Protection for Sourcing and Sinking Currents
• Power-Good Indicator with Programmable Delay
• Compact 28 Ld 5x5 QFN Package
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
Telecom and Datacom Servers
• Point of Load Modules
• Routers and Switchers
High Current Distributed Power Supplies
Ordering Information
PART
NUMBER*
(Note)
PART
TEMP.
MARKING RANGE (°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL8118CRZ ISL8118CRZ 0 to 70 28 Ld 5x5 QFN L28.5x5
ISL8118IRZ ISL8118IRZ -40 to 85 28 Ld 5x5 QFN L28.5x5
*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.
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.


Intersil Electronic Components Datasheet

ISL8118 Datasheet

Single-Phase PWM Controller

No Preview Available !

Block Diagram
REFIN
REFOUT
MARGIN
OFSP
OFSN
EN VCC
REFERENCE
VREF = 0.591V
POWER-ON
RESET (POR)
VOLTAGE
MARGINING
OTA
SOFT-START
AND
FAULT LOGIC
VIN EXDRV
INTERNAL SERIES EXTERNAL SERIES
LINEAR
LINEAR DRIVER
SOURCE OCP
100µA
TSOC
BOOT
TGATE
SS
FB
COMP
VCC
800mV
VSENSP
VSENSN
G=1
UNITY GAIN
DIFF AMP
PWM
COMP
EA
OV/UV
COMP
PGOOD
COMP
SOURCE
OCP
100µA
SINKING OCP
OSCILLATOR
G = -1
VDIFF PGDLY PGOOD
BSOC
VFF FSET
GATE
CONTROL
LOGIC
LX
PVCC
BGATE
PGND
GND
GND


Part Number ISL8118
Description Single-Phase PWM Controller
Maker Intersil Corporation
Total Page 20 Pages
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