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Renesas Electronics Components Datasheet

ISL6529A Datasheet

Dual Regulator-Synchronous Rectified Buck PWM and Linear Power Controllers

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NOT RECOMMENDED FOR NEW DESIGNS
DATASHEETNO RECOMMENDED REPLACEMENT
contact our Technical Support Center at
ISL6529, ISL6529A
1-888-INTERSIL or www.intersil.com/tsc
FN9070
Dual Regulator–Synchronous Rectified Buck PWM and Linear Power Controllers
Rev 5.00
Apr 12, 2005
The ISL6529, ISL6529A provide the power control and
protection for two output voltages in high-performance
graphics cards and other embedded processor applications.
The dual-output controllers drive two N-Channel MOSFETs
in a synchronous rectified buck converter topology and one
N-Channel MOSFET in a linear configuration. The ISL6529,
ISL6529A provide both a regulated high current, low voltage
supply and an independent, lower current supply integrated
in a 14-lead SOIC package. The controllers are ideal for
graphic card applications where regulation of both the
graphics processing unit (GPU) and memory supplies is
required.
The synchronous rectified buck converters incorporate
simple, single feedback loop, voltage-mode control with fast
transient response. Both the switching regulator and linear
regulator provide a maximum static regulation tolerance of
±2% over line, load, and temperature ranges. Each output is
user-adjustable by means of external resistors.
An integrated soft-start feature brings both supplies into
regulation in a controlled manner. Each output is monitored
via the FB pins for undervoltage events. If either output
drops below 51.5% of the nominal output level, both
converters are shut down.
Ordering Information
TEMP.
PART NUMBER* RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL6529ACB
0 to 70 14 Ld SOIC
M14.15
ISL6529ACBZ (Note) 0 to 70 14 Ld SOIC (Pb-free) M14.15
ISL6529ACR
0 to 70 16 Ld 5x5 QFN
L16.5x5B
ISL6529ACRZ (Note) 0 to 70 16 Ld 5x5 QFN
(Pb-free)
L16.5x5B
ISL6529CB
0 to 70 14 Ld SOIC
M14.15
ISL6529CBZ (Note) 0 to 70 14 Ld SOIC (Pb-free) M14.15
ISL6529CR
0 to 70 16 Ld 5x5 QFN
L16.5x5B
ISL6529CRZ (Note)
0 to 70 16 Ld 5x5 QFN
(Pb-free)
L16.5x5B
ISL6529EVAL1
Evaluation Board
*Add “-T” suffix for tape and reel.
NOTE: 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.
Features
• Provides two regulated voltages
- One synchronous rectified buck PWM controller
- One linear controller
• Both controllers drive low cost N-Channel MOSFETs
• 12V direct drive saves external components
• Small converter size
- 600kHz constant frequency operation
- Small external component count
• Excellent output voltage regulation
- Both outputs: ±1% over temperature - ISL6529AC
- Both outputs: ±2% over temperature - ISL6529C
• 5V down conversion
• PWM and linear output voltage range: down to 0.8V
• Simple single-loop voltage-mode PWM control design
• Fast PWM converter transient response
- High-bandwidth error amplifier
- Full 0-100% duty ratio
• Linear controller drives N-Channel MOSFET pass transistor
• Fully-adjustable outputs
• Undervoltage fault monitoring on both outputs
• 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 Available (RoHS Compliant)
Applications
Graphics–GPU and memory supplies
• ASIC power supplies
• Embedded processor and I/O supplies
• DSP supplies
Related Literature
• Technical Brief TB363 Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)
FN9070 Rev 5.00
Apr 12, 2005
Page 1 of 20


Renesas Electronics Components Datasheet

ISL6529A Datasheet

Dual Regulator-Synchronous Rectified Buck PWM and Linear Power Controllers

No Preview Available !

ISL6529, ISL6529A
Pinouts
ISL6529, ISL6529A (SOIC)
TOP VIEW
LGATE 1
PGND 2
GND 3
5VCC 4
DRIVE2 5
FB2 6
NC 7
14 UGATE
13 12VCC
12 NC
11 NC
10 COMP
9 FB
8 NC
NC = NO INTERNAL CONNECTION
ISL6529, ISL6529A (QFN)
TOP VIEW
16 15 14 13
PGND 1
12 12VCC
GND 2
5VCC 3
DRIVE2 4
11 NC
10 COMP
9 FB
5678
NC = NO INTERNAL CONNECTION
FN9070 Rev 5.00
Apr 12, 2005
Page 2 of 20


Part Number ISL6529A
Description Dual Regulator-Synchronous Rectified Buck PWM and Linear Power Controllers
Maker Renesas
Total Page 20 Pages
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