欢迎访问ic37.com |
会员登录 免费注册
发布采购

ISL6522CB 参数 Datasheet PDF下载

ISL6522CB图片预览
型号: ISL6522CB
PDF下载: 下载PDF文件 查看货源
内容描述: 降压和同步整流器脉宽调制( PWM )控制器 [Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller]
分类和应用: 开关光电二极管控制器
文件页数/大小: 14 页 / 471 K
品牌: INTERSIL [ INTERSIL CORPORATION ]
 浏览型号ISL6522CB的Datasheet PDF文件第2页浏览型号ISL6522CB的Datasheet PDF文件第3页浏览型号ISL6522CB的Datasheet PDF文件第4页浏览型号ISL6522CB的Datasheet PDF文件第5页浏览型号ISL6522CB的Datasheet PDF文件第6页浏览型号ISL6522CB的Datasheet PDF文件第7页浏览型号ISL6522CB的Datasheet PDF文件第8页浏览型号ISL6522CB的Datasheet PDF文件第9页  
®
ISL6522
Data Sheet
March 4, 2005
FN9030.7
Buck and Synchronous Rectifier
Pulse-Width Modulator (PWM) Controller
The ISL6522 provides complete control and protection for a
DC-DC converter optimized for high-performance micro-
processor applications. It is designed to drive two N-Channel
MOSFETs in a synchronous rectified buck topology. The
ISL6522 integrates all of the control, output adjustment,
monitoring and protection functions into a single package.
The output voltage of the converter can be precisely
regulated to as low as 0.8V, with a maximum tolerance of
±1%
over temperature and line voltage variations.
The ISL6522 provides simple, single feedback loop, voltage-
mode control with fast transient response. It includes a
200kHz free-running triangle-wave oscillator that is
adjustable from below 50kHz to over 1MHz. 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 ratio
ranges from 0–100%.
The ISL6522 protects against overcurrent conditions by
inhibiting PWM operation. The ISL6522 monitors the current
by using the r
DS(ON)
of the upper MOSFET which eliminates
the need for a current sensing resistor.
Features
• Drives two N-Channel MOSFETs
• Operates from +5V or +12V input
• Simple single-loop control design
- Voltage-mode PWM control
• Fast transient response
- High-bandwidth error amplifier
- Full 0–100% duty ratio
• Excellent output voltage regulation
- 0.8V internal reference
-
±1%
over line voltage and temperature
• Overcurrent fault monitor
- Does not require extra current sensing element
- Uses MOSFETs r
DS(ON)
• Converter can source and sink current
• Small converter size
- Constant frequency operation
- 200kHz free-running oscillator programmable from
50kHz to over 1MHz
• 14-lead SOIC and TSSOP package and 16-lead 5x5mm
QFN Package
• QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat
No Leads-Product Outline.
- Near Chip-Scale Package Footprint; Improves PCB
Efficiency and Thinner in Profile
• Pb-Free Available (RoHS Compliant)
Pinouts
RT
OCSET
SS
COMP
FB
EN
GND
1
2
3
4
5
6
7
SOIC, TSSOP
TOP VIEW
14 VCC
13 PVCC
12 LGATE
11 PGND
10 BOOT
9
8
UGATE
PHASE
Applications
• Power supply for Pentium
®
, Pentium Pro, PowerPC
®
and
AlphaPC™ microprocessors
• High-power 5V to 3.xV DC-DC regulators
• Low-voltage distributed power supplies
QFN
TOP VIEW
OCSET
VCC
13
12 PVCC
11 LGATE
GND
FB 3
EN 4
5
NC
6
GND
7
PHASE
8
UGATE
10 PGND
9
BOOT
NC
16
SS 1
COMP 2
15
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001, 2002, 2004, 2005. All Rights Reserved
PowerPC
®
is a trademark of IBM. AlphaPC™ is a trademark of Digital Equipment Corporation. Pentium
®
is a registered trademark of Intel Corporation.
1
RT
14