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ISL6520A
Data Sheet
December 28, 2004
FN9016.3
Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
The ISL6520A makes simple work out of implementing a
complete control and protection scheme for a DC-DC
stepdown converter. Designed to drive N-channel MOSFETs
in a synchronous buck topology, the ISL6520A integrates the
control, output adjustment, monitoring and protection
functions into a single 8-Lead package.
The ISL6520A provides simple, single feedback loop,
voltage-mode control with fast transient response. The
output voltage can be precisely regulated to as low as 0.8V,
with a maximum tolerance of
鹵1.5%
over temperature and
line voltage variations. A fixed frequency oscillator reduces
design complexity, while balancing typical application cost
and efficiency.
The error amplifier features a 15MHz gain-bandwidth
product and 8V/碌s slew rate which enables high converter
bandwidth for fast transient performance. The resulting PWM
duty cycles range from 0% to 100%.
Protection from overcurrent conditions is provided by
monitoring the r
DS(ON)
of the upper MOSFET to inhibit PWM
operation appropriately. This approach simplifies the
implementation and improves efficiency by eliminating the
need for a current sense resistor.
Features
鈥?Operates from +5V Input
鈥?0.8V to V
IN
Output Range
- 0.8V Internal Reference
- 鹵1.5% Over Line Voltage and Temperature
鈥?Drives N-Channel MOSFETs
鈥?Simple Single-Loop Control Design
- Voltage-Mode PWM Control
鈥?Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
鈥?Lossless, Programmable Overcurrent Protection
- Uses Upper MOSFET鈥檚 r
DS(ON)
鈥?Small Converter Size
- 300kHz Fixed Frequency Oscillator
- Internal Soft Start
- 8 Ld SOIC or 16Ld 4x4mm QFN
鈥?QFN Package:
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
鈥?/div>
Pb-Free Available (RoHS Compliant)
Ordering Information
PART NUMBER
ISL6520ACB
ISL6520ACBZ
(Note 1)
ISL6520ACBZA-T
(Note 1)
ISL6520AIB
ISL6520AIBZ (Note 1)
ISL6520ACR
ISL6520ACRZ (Note 1)
ISL6520AIR
ISL6520AIRZ (Note 1)
ISL6520EVAL1
TEMP.
RANGE (擄C)
0 to 70
0 to 70
0 to 70
-40 to 85
-40 to 85
0 to 70
0 to 70
-40 to 85
-40 to 85
PACKAGE
8 Ld SOIC
PKG.
DWG. #
M8.15
Applications
鈥?Power Supplies for Microprocessors
- PCs
- Embedded Controllers
鈥?Subsystem Power Supplies
- PCI/AGP/GTL+ Buses
- ACPI Power Control
- SSTL-2 and DDR SDRAM Bus Termination Supply
鈥?Cable Modems, Set Top Boxes, and DSL Modems
鈥?DSP and Core Communications Processor Supplies
鈥?Memory Supplies
鈥?Personal Computer Peripherals
鈥?Industrial Power Supplies
鈥?5V-Input DC-DC Regulators
鈥?Low-Voltage Distributed Power Supplies
8 Ld SOIC (Pb-free) M8.15
8 Ld SOIC Tape and M8.15
Reel (Pb-free)
8 Ld SOIC
M8.15
8 Ld SOIC (Pb-free) M8.15
16 Ld 4x4mm QFN L16.4x4
16 Ld 4x4mm QFN L16.4x4
(Pb-free)
16 Ld 4x4mm QFN L16.4x4
16 Ld 4x4mm QFN L16.4x4
(Pb-free)
Evaluation Board
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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
INTERSIL
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