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AAT1162IRN-0.6-T1 PDF预览

AAT1162IRN-0.6-T1

更新时间： 2024-02-07 00:39:03
品牌 Logo 应用领域
思佳讯 - SKYWORKS 转换器稳压器开关式稳压器或控制器电源电路开关式控制器
页数 文件大小 规格书
19页 2637K
描述
12V, 1.5A Step-Down DC/DC Converter

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AAT1162IRN-0.6-T1 技术参数

是否Rohs认证： 符合生命周期：Obsolete
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.84
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
JESD-30 代码：R-PDSO-N16端子数量：16
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：1.5 A封装主体材料：PLASTIC/EPOXY
封装代码：SON封装等效代码：SOLCC16,.12,18
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
认证状态：Not Qualified子类别：Switching Regulator or Controllers
表面贴装：YES最大切换频率：1000 kHz
温度等级：INDUSTRIAL端子形式：NO LEAD
端子节距：0.45 mm端子位置：DUAL
Base Number Matches：1

AAT1162IRN-0.6-T1 数据手册

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DATA SHEET  
AAT1162  
12V, 1.5A Step-Down DC/DC Converter  
High efficiency is maintained under light load conditions  
by automatically switching to variable frequency Light  
Load control. In this condition, transition losses are  
reduced by operating at a lower frequency at light  
loads.  
Applications Information  
Setting the Output Voltage  
Figure 1 shows the basic application circuit for the  
AAT1162 and output setting resistors. Resistors R1 and  
R2 program the output to regulate at a voltage higher  
than 0.6V. To limit the bias current required for the  
external feedback resistor string while maintaining good  
noise immunity, the minimum suggested value for R2 is  
5.9kΩ. Although a larger value will further reduce quies-  
cent current, it will also increase the impedance of the  
feedback node, making it more sensitive to external  
noise and interference. Table 1 summarizes the resistor  
values for various output voltages with R2 set to either  
5.9kΩ for good noise immunity or 59kΩ for reduced no  
load input current.  
Short-Circuit Protection  
The AAT1162 uses a cycle-by-cycle current limit to pro-  
tect itself and the load from an external fault condition.  
When the inductor current reaches the internally set  
3.0A current limit, the P-channel MOSFET switch turns  
off and the N-channel synchronous rectifier is turned on,  
limiting the inductor and the load current.  
During an overload condition, when the output voltage  
drops below 50% of the regulation voltage (0.3V at FB),  
the AAT1162 switching frequency drops by a factor of 4.  
This gives the inductor current ample time to reset dur-  
ing the off time to prevent the inductor current from  
rising uncontrolled in a short-circuit condition.  
L1  
EP2  
VOUT  
VIN 4.5V- 13.2V  
R4  
C6  
10μF  
3.8μH  
5V, 1.5A  
LX  
3
4
1
2
LX  
LX  
EN  
IN  
C1  
100pF  
R3  
10Ω  
5
7
C3  
22μF  
Thermal Protection  
C2  
0.1μF  
432kΩ  
IN  
9
AAT1162  
FB  
AIN  
10  
11  
C8  
1μF  
R6  
COMP  
AGND  
The AAT1162 includes thermal protection that disables  
the regulator when the die temperature reaches 140ºC.  
It automatically restarts when the temperature decreas-  
es by 25ºC or more.  
59kΩ  
6
13  
16  
R5  
24kΩ  
DGND  
DGND  
PGND  
14  
8
DGND  
LDO  
DGND  
EP1  
C7  
330pF  
C9  
1μF  
Figure 1: Typical Application Circuit.  
The adjustable feedback resistors, combined with an  
external feed forward capacitor (C1 in Figure 1), deliver  
enhanced transient response for extreme pulsed load  
applications. The addition of the feed forward capacitor  
typically requires a larger output capacitor C3 for stabil-  
ity. Larger C1 values reduce overshoot and undershoot  
during startup and load changes. However, do not  
exceed 470pF to maintain stable operation.  
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com  
10  
201998B  
• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013  
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