NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED REPLACEMENT PART
ISL8105
DATASHEET
FN9055
Rev 12.00
Sep 30, 2015
ISL6526, ISL6526A
Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
The ISL6526, ISL6526A make 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 ISL6526,
ISL6526A integrate the control, output adjustment,
monitoring and protection functions into a single package.
The ISL6526, ISL6526A provide 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 ±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 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 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
• Operates from 3.3V to 5V Input
• 0.8V to V
IN
Output Range
- 0.8V Internal Reference
- ±1.5% Over Load, Line Voltage and Temperature
• 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 r
DS(on)
• Converter can Source and Sink Current
• Small Converter Size
- Internal Fixed Frequency Oscillator
- ISL6526: 300kHz
- ISL6526A: 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+ Buses
- 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
FN9055 Rev 12.00
Sep 30, 2015
Page 1 of 18
ISL6526, ISL6526A
Ordering Information
PART NUMBER
(Notes 2, 3)
ISL6526CBZ
ISL6526CBZ-T (Note 1)
PART
MARKING
6526CBZ
6526CBZ
TEMP
RANGE (°C)
0 to +70
0 to +70
0 to +70
PACKAGE
14 Ld SOIC (Pb-free)
14 Ld SOIC (Pb-free)
14 Ld SOIC (Pb-free)
PKG
DWG. #
M14.15
M14.15
M14.15
ISL6526ACBZ
(No longer available,
6526ACBZ
recommended replacement:
ISL6526AIRZ)
ISL6526ACBZ-T (Note 1)
(No longer
6526ACBZ
available, recommended
replacement: ISL6526AIRZ-T)
ISL6526CRZ
(No longer available,
recommended replacement:
ISL6526IRZ)
ISL6526CRZ-T (Note 1)
(No longer
available, recommended
replacement: ISL6526IRZ-T)
ISL6526IBZ
ISL6526IBZ-T (Note 1)
ISL6526IRZ
ISL6526IRZ-T (Note 1)
ISL6526IRZ-TK (Note 1)
ISL6526AIRZ
ISL6526AIRZ-T (Note 1)
ISL6526AIRZ-TK (Note 1)
ISL6526EVAL1
ISL6526EVAL2
ISL6526AEVAL1
ISL6526AEVAL2
NOTES:
1. Please refer to
TB347
for details on reel specifications.
ISL6526 CRZ
0 to +70
14 Ld SOIC (Pb-free)
M14.15
0 to +70
16 Ld 5x5 QFN (Pb-free)
L16.5x5B
ISL6526 CRZ
0 to +70
16 Ld 5x5 QFN (Pb-free)
L16.5x5B
6526IBZ
6526IBZ
ISL 6526IRZ
ISL 6526IRZ
ISL 6526IRZ
ISL65 26AIRZ
ISL65 26AIRZ
ISL65 26AIRZ
ISL6526 SOIC Evaluation Board
ISL6526 QFN Evaluation Board
ISL6526A SOIC Evaluation Board
ISL6526A QFN Evaluation Board
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
14 Ld SOIC (Pb-free)
14 Ld SOIC (Pb-free)
16 Ld 5x5 QFN (Pb-free)
16 Ld 5x5 QFN (Pb-free)
16 Ld 5x5 QFN (Pb-free)
16 Ld 5x5 QFN (Pb-free)
16 Ld 5x5 QFN (Pb-free)
16 Ld 5x5 QFN (Pb-free)
M14.15
M14.15
L16.5x5B
L16.5x5B
L16.5x5B
L16.5x5B
L16.5x5B
L16.5x5B
2. 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.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL6526, ISL6526A.
For more information on MSL please see tech
brief
TB363.
FN9055 Rev 12.00
Sep 30, 2015
Page 2 of 18
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