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ISL6520BCRZ Datasheet

  • ISL6520BCRZ

  • Single Synchronous Buck Pulse-Width Modulation (PWM) Control...

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ISL6520B
Data Sheet
January 20, 2005
FN9083.2
Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
The ISL6520B makes simple work out of implementing a
complete control scheme for a DC-DC stepdown converter.
Designed to drive N-channel MOSFETs in a synchronous
buck topology, the ISL6520B integrates the control, output
adjustment and monitoring functions into a single 8-Lead
package.
The ISL6520B 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%.
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?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?Pb-Free Available (RoHS Compliant)
Pinouts
ISL6520B (8 LD SOIC)
TOP VIEW
BOOT 1
UGATE 2
GND 3
LGATE 4
8 PHASE
7 COMP/SD
6 FB
5 VCC
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
ISL6520B (16 LD QFN)
TOP VIEW
PHASE
14
NC
NC
NC
13
12
NC
11
COMP/SD
10
NC
9
5
LGATE
6
NC
7
VCC
8
NC
FB
16
BOOT
UGATE
GND
NC
1
2
3
4
15
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 漏 Intersil Americas Inc. 2003, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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