ISL8118| Datasheet

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ISL8118
Data Sheet August 1, 2006 FN6325.0

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 frequ
ency 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.

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)

Pinout
ISL8118 (28 LD 5x5 QFN) TOP VIEW
COMP VDIFF BSOC FSET TSOC GND

Applications
Telecom and Datacom Servers Point of Load Modules Routers and Switchers High Current Distributed Power Supplies
21 20 19 BOOT TGATE LX PGND BGATE PVCC EXDRV

28 VSENSP VSENSN REFOUT REFIN SS OFSP OFSN 1 2 3

Ordering Information
PART NUMBER* (Note) PART MARKING TEMP. RANGE ( C) 0 to 70 -40 to 85 PACKAGE (Pb-Free) PKG. DWG. #

GND 4 5 6 7 8 VCC 9 MARGIN 10 PGDLY 11 PGOOD 12 EN 13 VFF 14 VIN BOTTOM SIDE PAD 18 17 16 15

ISL8118CRZ ISL8118CRZ ISL8118IRZ ISL8118IRZ

28 Ld 5x5 QFN L28.5x5 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.

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.