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ISL6527 Datasheet

Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

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DATASHEET
ISL6527, ISL6527A
Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
FN9056
Rev 11.00
Sep 29, 2015
The ISL6527, ISL6527A make simple work out of
implementing a complete control and protection scheme for
a DC/DC step-down converter. Designed to drive N-Channel
MOSFETs in a synchronous buck topology, the ISL6527,
ISL6527A integrate the control, output adjustment,
monitoring and protection functions into a single package.
The ISL6527, ISL6527A provide simple, single feedback loop,
voltage-mode control with fast transient response. The output
voltage can be regulated to as low as the provided external
reference. A fixed frequency oscillator reduces design
complexity, while balancing typical application cost and
efficiency.
The error amplifier features a 15MHz gain-bandwidth
product and 6V/µs 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 rDS(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
• Operates from 3.3V to 5V Input
• Utilizes an External Reference
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
• Lossless, Programmable Overcurrent Protection
- Uses Upper MOSFET’s rDS(ON)
• Converter Can Source and Sink Current
• Small Converter Size
- Internal Fixed Frequency Oscillator
- ISL6527: 300kHz
- ISL6527A: 600kHz
• Internal Soft-Start
• 14 Ld SOIC or 16 Ld 5x5 QFN
• 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
• Pb-Free (RoHS compliant)
Applications
• Power Supplies for Microprocessors
- PCs
- Embedded Controllers
• Subsystem Power Supplies
- PCI/AGP/GTL+ Busses
- ACPI Power Control
- DDR SDRAM Bus Termination Supply
• Cable Modems, Set-Top Boxes, and DSL Modems
• DSP and Core Communications Processor Supplies
• Memory Supplies
• Personal Computer Peripherals
• Industrial Power Supplies
• 3.3V Input DC/DC Regulators
• Low Voltage Distributed Power Supplies
FN9056 Rev 11.00
Sep 29, 2015
Page 1 of 17


Renesas Electronics Components Datasheet

ISL6527 Datasheet

Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

No Preview Available !

ISL6527, ISL6527A
Ordering Information
PART NUMBER
(Note)
PART MARKING
TEMP
RANGE (°C)
PACKAGE
(Pb-Free)
PKG
DWG. #
ISL6527ACBZ*
6527ACBZ
0 to +70
14 Ld SOIC
M14.15
ISL6527ACRZ*
(No longer available, recommended replacement:
ISL6527ACBZ, ISL6527ACBZ-T)
ISL6527 ACRZ
0 to +70
16 Ld 5x5 QFN
L16.5x5B
ISL6527AIRZ*
(No longer available, recommended replacement:
ISL6527ACBZ, ISL6527ACBZ-T)
ISL6527 AIRZ
-40 to +85 16 Ld 5x5 QFN
L16.5x5B
ISL6527CRZ*
(No longer available, recommended replacement:
ISL6527ACBZ, ISL6527ACBZ-T)
ISL6527 CRZ
0 to +70
16 Ld 5x5 QFN
L16.5x5B
ISL6527IBZ*
(No longer available, recommended replacement:
ISL6527ACBZ, ISL6527ACBZ-T)
6527IBZ
-40 to +85 14 Ld SOIC
M14.15
ISL6527IRZ*
(No longer available, recommended replacement:
ISL6527ACBZ, ISL6527ACBZ-T)
ISL6527 IRZ
-40 to +85 16 Ld 5x5 QFN
L16.5x5B
ISL6527EVAL1
ISL6527 SOIC Evaluation Board
ISL6527EVAL2
ISL6527 QFN Evaluation Board
ISL6527AEVAL2
ISL6527A QFN Evaluation Board
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100%
matte tin plate plus anneal (e3 termination finish, which is 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.
Pinouts
ISL6527, ISL6527A
(14 LD SOIC)
TOP VIEW
GND 1
LGATE 2
CPVOUT 3
CT1 4
CT2 5
OCSET/SD 6
FB 7
14 UGATE
13 BOOT
12 PHASE
11 VCC
10 CPGND
9 REF_IN
8 COMP
ISL6527, ISL6527A
(16 LD QFN)
TOP VIEW
CPVOUT
CT1
CT2
OCSET/SD
NO
16
1
2
3
LO4NGE5R
15 14
AVAILABLE
67
OR1S3UP11P21ORPVTEHCDACSE
10 CPGND
9 NC
8
FN9056 Rev 11.00
Sep 29, 2015
Page 2 of 17


Part Number ISL6527
Description Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
Maker Renesas
Total Page 17 Pages
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