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ISL6522IB-T PDF预览

ISL6522IB-T

更新时间: 2024-11-27 22:10:55
品牌 Logo 应用领域
英特矽尔 - INTERSIL 控制器
页数 文件大小 规格书
14页 471K
描述
Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller

ISL6522IB-T 数据手册

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ISL6522  
®
Data Sheet  
March 4, 2005  
FN9030.7  
Buck and Synchronous Rectifier  
Features  
• Drives two N-Channel MOSFETs  
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.  
• 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  
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.  
• Excellent output voltage regulation  
- 0.8V internal reference  
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%.  
- ±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  
The ISL6522 protects against overcurrent conditions by  
inhibiting PWM operation. The ISL6522 monitors the current  
50kHz to over 1MHz  
by using the r  
of the upper MOSFET which eliminates  
• 14-lead SOIC and TSSOP package and 16-lead 5x5mm  
QFN Package  
DS(ON)  
the need for a current sensing resistor.  
• 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  
SOIC, TSSOP  
Pinouts  
TOP VIEW  
14  
13  
12  
11  
10  
9
RT  
OCSET  
SS  
1
2
3
4
5
6
7
VCC  
PVCC  
LGATE  
PGND  
BOOT  
UGATE  
PHASE  
• Pb-Free Available (RoHS Compliant)  
COMP  
FB  
Applications  
• Power supply for Pentium , Pentium Pro, PowerPC and  
AlphaPC™ microprocessors  
EN  
®
®
8
GND  
QFN  
• High-power 5V to 3.xV DC-DC regulators  
• Low-voltage distributed power supplies  
TOP VIEW  
16 15 14 13  
SS  
COMP  
FB  
1
2
3
4
12 PVCC  
11 LGATE  
10 PGND  
GND  
EN  
9
BOOT  
5
6
7
8
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.  
1
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.  

ISL6522IB-T 替代型号

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