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| 型号： | ISL6549IRZ |
| 厂商： | Intersil |
| 文件页数： | 1/3页 |
| 文件大小： | 430K |
| 描述： | IC REG DL BCK/LINEAR SYNC 16-QFN |
| 标准包装： | 75 |
| 拓扑： | 降压（降压）同步（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 150kHz ~ 1MHz |
| 电压/电流 - 输出 1： | 控制器 |
| 电压/电流 - 输出 2： | 控制器 |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | * |
| 封装/外壳： | 16-VQFN 裸露焊盘 |
| 供应商设备封装： | * |
| 包装： | 管件 |
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ISL6549
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
?SPAN class="pst ISL6549CRZR5213_2462365_4">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)
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: ?% 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
Ordering Information
PART NUMBER
PART MARKING
TEMP. RANGE (癈)
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.
Data Sheet
September 22, 2006
FN9168.2
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.
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