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AAT1162IRN-0.6-T1 PDF预览

AAT1162IRN-0.6-T1

更新时间： 2024-01-10 15:07:04
品牌 Logo 应用领域
ANALOGICTECH 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
16页 626K
描述
12V, 1.5A Step-Down DC/DC Converter

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中文翻译

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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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AAT1162  
12V, 1.5A Step-Down DC/DC Converter  
The external resistors set the output voltage  
according to the following equation:  
Inductor Selection  
For most designs, the AAT1162 operates with  
inductors of 2µH to 4.7µH. For output voltages  
above 3.3V, the minimum recommended inductor is  
3.8µH. For 3.3V and below, use a 2 to 2.2µH induc-  
tor. For optimum voltage-positioning load transients,  
choose an inductor with DC series resistance in the  
15mꢁ to 20mꢁ range. For higher efficiency at  
heavy loads (above 1A), or minimal load regulation  
(but some transient overshoot), the resistance  
should be kept below 18mꢁ. The DC current rating  
of the inductor should be at least equal to the max-  
imum load current plus half the ripple current to pre-  
vent core saturation (1.5A + 263mA). Table 2 lists  
some typical surface mount inductors that meet tar-  
get applications for the AAT1162.  
⎛
R1⎞  
R2⎠  
V
OUT = 0.6V 1 +  
⎝
or  
V
⎛
⎝
⎞
-1 · R2  
⎠
OUT  
R1 =  
V
REF  
Table 1 shows the resistor selection for different  
output voltage settings.  
R2 = 5.9(kΩ)  
R1 (kΩ)  
R2 = 59(kΩ)  
R1 (kΩ)  
Manufacturer's specifications list both the inductor  
DC current rating, which is a thermal limitation, and  
the peak current rating, which is determined by the  
saturation characteristics. The inductor should not  
show any appreciable saturation under normal load  
conditions. Some inductors may meet the peak and  
average current ratings yet result in excessive loss-  
es due to a high DCR. Always consider the losses  
associated with the DCR and its effect on the total  
converter efficiency when selecting an inductor.  
For example, the 3.7ꢀH CDR7D43 series inductor  
selected from Sumida has an 18.9mΩ DCR and a  
4.3ADC current rating. At full load, the inductor DC  
loss is 28mW which gives only a 0.4% loss in effi-  
ciency for a 1.5A, 5V output.  
VOUT (V)  
0.8  
0.9  
1.0  
1.1  
1.2  
1.3  
1.4  
1.5  
1.8  
1.85  
2.0  
2.5  
3.3  
5.0  
1.96  
2.94  
3.92  
4.99  
5.90  
6.81  
7.87  
8.87  
11.8  
12.4  
13.7  
18.7  
26.7  
43.2  
19.6  
29.4  
39.2  
49.9  
59.0  
68.1  
78.7  
88.7  
118  
124  
137  
187  
267  
432  
Compensation  
The AAT1162 step-down converter uses peak cur-  
rent mode control with slope compensation  
scheme to maintain stability with lower value induc-  
tors for duty cycles greater than 50%. The regula-  
tion feedback loop in the IC is stabilized by the  
components connected to the COMP pin, as  
shown in Figure 1.  
Table 1: Resistor Selection for Different Output  
Voltage Settings. Standard 1% Resistors are  
Substituted for Calculated Values.  
12  
1162.2007.09.1.2  
1...910111213141516

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