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Intersil Electronic Components Datasheet

6549CBZ Datasheet

ISL6549CBZ

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Data Sheet
September 22, 2006
ISL6549
FN9168.2
Single 12V Input Supply Dual Regulator —
Synchronous Rectified Buck PWM and
Linear Power Controller
The ISL6549 provides the power control and protection for
two output voltages in high-performance applications. The
dual-output controller drives two N-Channel MOSFETs in a
synchronous rectified buck converter topology and one
N-Channel MOSFET in a linear configuration. The controller is
ideal for applications where regulation of both the processing
unit and memory supplies is required.
The synchronous rectified buck converter incorporates
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
±1% 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 75% of the nominal output level, both converters are
shut off and go into retry mode.
The ISL6549 is available in a 14 Ld SOIC package,
16 Ld QSOP, or 16 Ld 4x4 QFN packages.
Related Literature
• Technical Brief TB363 Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)
Ordering Information
Features
• Single 12V bias supply (no 5V supply is required)
• Provides two regulated voltages
- One synchronous rectified buck PWM controller
- One linear controller
• Both controllers drive low cost N-Channel MOSFETs
• Small converter size
- Adjustable frequency 150kHz to 1MHz
- Small external component count
• Excellent output voltage regulation
- Both outputs: ±1% over temperature
• 12V 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
• Undervoltage fault monitoring on both outputs
• Pb-free plus anneal available (RoHS compliant)
Applications
Processor and memory supplies
• ASIC power supplies
• Embedded processor and I/O supplies
• DSP supplies
PART NUMBER
PART MARKING
TEMP. RANGE (°C)
PACKAGE
PKG. DWG. #
ISL6549CB
ISL6549CB
0 to 70
14 Ld SOIC
M14.15
ISL6549CBZ (Note)
6549CBZ
0 to 70
14 Ld SOIC (Pb-free)
M14.15
ISL6549CR
ISL6549CR
0 to 70
16 Ld 4x4 QFN
L16.4x4
ISL6549CRZ (Note)
6549CRZ
0 to 70
16 Ld 4x4 QFN (Pb-free)
L16.4x4
ISL6549CA
ISL6549CA
0 to 70
16 Ld QSOP
M16.15A
ISL6549CAZ (Note)
6549CAZ
0 to 70
16 Ld QSOP (Pb-free)
M16.15A
ISL6549CAZA (Note)
6549CAZ
0 to 70
16 Ld QSOP (Pb-free)
M16.15A
ISL6549IBZ (Note)
6549IBZ
-40 to 85
14 Ld SOIC (Pb-free)
M14.15
ISL6549IRZ (Note)
6549IRZ
-40 to 85
16 Ld 4x4 QFN (Pb-free)
L16.4x4
ISL6549IAZ (Note)
6549IAZ
-40 to 85
16 Ld QSOP (Pb-free)
M16.15A
ISL6549LOW-EVAL1
Evaluation Board 1-5A
ISL6549HI-EVAL1
Evaluation Board up to 20A
Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal 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 1-888-468-3774 | Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.


Intersil Electronic Components Datasheet

6549CBZ Datasheet

ISL6549CBZ

No Preview Available !

www.PDaitnaSohueetts4U.com
ISL6549 (SOIC)
TOP VIEW
ISL6549
ISL6549 (QFN)
TOP VIEW
ISL6549 (QSOP)
TOP VIEW
BOOT 1
FS_DIS 2
COMP 3
FB 4
LDO_DR 5
LDO_FB 6
GND 7
14 UGATE
13 PHASE
12 PGND
11 LGATE
10 PVCC5
9 VCC5
8 VCC12
16 15 14 13
COMP 1
FB 2
LDO_DR 3
LDO_FB 4
METAL
GND
PAD
(BOTTOM)
12 PGND
11 LGATE
10 PVCC5
9 VCC5
5678
BOOT 1
FS_DIS 2
COMP 3
FB 4
LDO_DR 5
LDO_FB 6
AGND 7
DGND 8
16 UGATE
15 PHASE
14 PGND
13 LGATE
12 PVCC5
11 VCC5
10 VCC12
9 VCC12
Block Diagram
VOLTAGE
REFERENCE
LDO_FB
LDO_DR
EA2
FS_DIS
GND
DIS
OSCILLATOR
UV2
VCC5
POWER-ON
RESET (POR)
VCC12
5V
REGULATOR
SOFT-START
RESTART
INHIBIT
SOFT-START
DIS
EA1
PWM
COMP
GATE
LOGIC
PVCC5
BOOT
UGATE
PHASE
LGATE
UV1
PGND
FB COMP
2 FN9168.2
September 22, 2006


Part Number 6549CBZ
Description ISL6549CBZ
Maker Intersil Corporation
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6549CBZ Datasheet PDF






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