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ISL80121-5

更新时间： 2024-11-10 14:57:59
品牌 Logo 应用领域
瑞萨 - RENESAS /
页数 文件大小 规格书
12页 727K
描述
1A Ultra Low Dropout Linear Regulator with Programmable Current Limiting

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ISL80121-5 数据手册

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DATASHEET  
ISL80121-5  
FN7713  
Rev 6.00  
March 21, 2016  
1A Ultra Low Dropout Linear Regulator with Programmable Current Limiting  
The ISL80121-5 is a low dropout voltage, single output LDO  
Features  
with programmable current limiting. The ISL80121-5 operates  
• ±1.8% V  
accuracy guaranteed over line, load and  
T = -40°C to +125°C  
from input voltages of 5V to 6V with a nominal output voltage  
of 5V. Other custom voltage options are available upon  
request.  
OUT  
J
• Very low 130mV dropout voltage  
A submicron 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.  
• High accuracy current limit programmable up to 1.75A  
• Very fast transient response  
• 210µV  
output noise  
RMS  
• Power-good output  
• Programmable soft-start  
• Over-temperature protection  
• Small 10 Ld DFN package  
This BiCMOS 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  
5.4V ±10%  
ISL80121-5  
5.4V ±10%  
5.0V  
OUT  
5.0V  
V
V
IN  
V
V
IN  
OUT  
10  
9
1
2
10  
9
1
2
V
V
V
V
IN  
IN  
OUT  
V
V
V
V
IN  
IN  
OUT  
OUT  
C
C
IN  
10µF  
OUT  
10µF  
C
IN  
10µF  
C
OUT  
10µF  
OUT  
R
SENSE  
10Ω  
8
3
SENSE  
8
3
4
I
SET  
R
I
SENSE  
PG  
100kΩ  
SET  
R
SET  
10kΩ  
R
PG  
100kΩ  
ON  
ON  
7
6
7
6
4
OFF  
ENABLE  
SS  
PG  
OFF  
ENABLE  
SS  
PG  
GND  
GND  
C
5
SS  
C
SS  
5
I
= 0.75A  
2.9  
= 0.75 + ------------------------------  
LIMIT  
I
LIMIT  
R
k  
SET  
(DEFAULT)  
FIGURE 1.  
FIGURE 2.  
FN7713 Rev 6.00  
March 21, 2016  
Page 1 of 12  
1234567...12

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