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ISL80121-5_1109

更新时间： 2024-09-15 11:57:27
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英特矽尔 - INTERSIL 稳压器
页数 文件大小 规格书
11页 478K
描述
1A Ultra Low Dropout Linear Regulator with Programmable Current Limiting

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ISL80121-5_1109 数据手册

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1A Ultra Low Dropout Linear Regulator with  
Programmable Current Limiting  
ISL80121-5  
Features  
The ISL80121-5 is a low dropout voltage, single output LDO with  
programmable current limiting. This LDO operates from input  
voltages of 2.2V to 6V. The ISL80121-5 has a nominal output  
voltage of 5V. Other custom voltage options are available upon  
request.  
• ±1.8% V  
Accuracy Guaranteed Over Line, Load and  
T = -40°C to +125°C  
OUT  
J
• Very Low 130mV Dropout Voltage at V = 5.0V  
IN  
• High Accuracy Current Limit Programmable up to 1.75A  
• Very Fast Transient Response  
A sub-micron BiCMOS process is utilized for this product family to  
deliver the best in class analog performance and overall value.  
The programmable current limiting improves system reliability of  
end applications. An external capacitor on the soft-start pin  
provides an adjustable soft-starting ramp. The ENABLE feature  
allows the part to be placed into a low quiescent current  
shutdown mode.  
• 210µV  
Output Noise  
RMS  
• Power-Good Output  
• Programmable Soft-Start  
• Over-Temperature Protection  
• Small 10 Ld DFN Package  
This CMOS LDO will consume significantly lower quiescent  
current as a function of load compared to bipolar LDOs, which  
translates into higher efficiency and packages with smaller  
footprints. Quiescent current is modestly compromised to  
achieve a very fast load transient response.  
Applications  
• USB devices  
• Telecommunications and Networking  
• Medical Equipment  
• Instrumentation Systems  
• Routers and Switchers  
• Gaming  
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS  
PROGRAMMABLE  
I
ADJ or FIXED  
LIMIT  
PART NUMBER  
ISL80101-ADJ  
ISL80101  
I
(DEFAULT)  
V
LIMIT  
No  
OUT  
1.75A  
ADJ  
No  
1.75A  
1.8V, 2.5V,  
3.3V, 5.0V  
ISL80101A  
ISL80121-5  
Yes  
Yes  
1.62A  
0.75A  
ADJ  
5.0V  
Typical Applications  
ISL80121-5  
ISL80121-5  
5.4V ±10%  
5.4V ±10%  
5.0V ±1.8%  
5.0V ±1.8%  
V
V
IN  
OUT  
V
V
IN  
OUT  
10  
9
1
2
10  
1
2
V
V
V
V
IN  
IN  
OUT  
OUT  
V
V
V
V
IN  
OUT  
OUT  
C
C
IN  
10µF  
C
IN  
OUT  
10µF  
9
C
OUT  
10µF  
R
SENSE  
10Ω  
IN  
10µF  
8
3
SENSE  
8
I
3
4
SET  
R
I
SENSE  
PG  
PG  
100kΩ  
SET  
R
10kΩ  
SET  
R
PG  
100kΩ  
ON  
ON  
7
6
7
6
4
OFF  
ENABLE  
SS  
OFF  
ENABLE  
PG  
SS  
GND  
5
GND  
C
5
C
SS  
SS  
I
= 0.75A  
2.9  
LIMIT  
(default)  
I
= 0.75 + ------------------------------------  
LIMIT  
R
(kΩ)  
SET  
September 29, 2011  
FN7713.4  
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. 2010, 2011. 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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