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ISL8130

更新时间： 2024-11-11 12:23:07
品牌 Logo 应用领域
英特矽尔 - INTERSIL 脉冲控制器
页数 文件大小 规格书
24页 1139K
描述
Advanced Single Universal Pulse-Width Modulation (PWM) Controller

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Advanced Single Universal Pulse-Width Modulation  
(PWM) Controller  
ISL8130  
The ISL8130 is a versatile controller that integrates control,  
output adjustment, monitoring and protection functions into a  
single package for synchronous buck, standard boost, SEPIC  
and flyback topologies.  
Features  
• Universal controller for multiple DC/DC converters  
• Wide input range  
- 4.5V to 5.5V  
- 5.5V to 28V  
The ISL8130 provides simple, single feedback loop, voltage  
mode control with fast transient response. The output voltage  
of the converter can be precisely regulated to as low as 0.6V.  
The switching frequency is adjustable from 100kHz to 1.4MHz.  
• Programmable soft-start  
• Supports pre-biased load applications  
• Resistor-selectable switching frequency  
- 100kHz to 1.4MHz  
The error amplifier features a 15MHz gain-bandwidth product  
and 6V/µs slew rate that enables fast transient response. The  
PWM duty cycle ranges from 0% to 100% in transient  
conditions. The capacitor from the ENSS pin to ground sets  
soft-start slew rate.  
• External reference tracking mode  
• Fast transient response  
- High-bandwidth error amplifier  
• Extensive circuit protection functions  
- Overvoltage, overcurrent, shutdown  
The ISL8130 monitors the output voltage and generates a  
PGOOD (power-good) signal when soft-start sequence is  
complete and the output is within regulation. A built-in  
overvoltage protection circuit prevents the output voltage from  
going typically above 115% of the set point. For a buck and  
buck-boost configuration, protection from overcurrent  
• Pb-free (RoHS compliant)  
Applications  
• Power supplies for microprocessors/ASICs  
• Ethernet routers and switchers  
conditions is provided by monitoring the r  
of the upper  
DS(ON)  
MOSFET to inhibit the PWM operation appropriately. This  
approach improves efficiency by eliminating the need for a  
current sensing resistor. For other topologies, overcurrent  
protection is achieved using a current sensing resistor.  
• Medical instrument power supplies  
Related Literature  
• Technical Brief TB389 “PCB Land Pattern Design and  
Surface Mount Guidelines for QFN Packages”  
5.6V to 16V  
C
6
C
1
C
5
C
C
3
2
C
4
R
499Ω  
1
VIN VCC5  
PVCC  
R
OCSET  
ISEN  
cs  
MONITOR AND  
PROTECTION  
E
5mΩ  
NSS  
RT  
L
1
10µH  
LGATE  
BOOT  
47.5kΩ  
PGOOD  
CDEL  
OSC  
32V  
C
0.1µF  
7
R
2
D
1
0.1µF  
REF  
UGATE  
PHASE  
-
+
C
C
C
10  
9
8
SGND  
FB  
Q
1
220µF x 2  
+
-
R
3
COMP  
C
REFIN  
11  
3.32kΩ  
REFOUT  
470pF  
R
5
C
14  
2.2µF  
C
12  
10kΩ  
R
12.1kΩ  
6
47nF  
R
4
C
15  
470pF  
174kΩ  
FIGURE 1. BOOST CONVERTER  
October 5, 2012  
FN7954.3  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2012. All Rights Reserved  
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
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