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AAT1275IRN-5.0-T1 参数 Datasheet PDF下载

AAT1275IRN-5.0-T1图片预览
型号: AAT1275IRN-5.0-T1
PDF下载: 下载PDF文件 查看货源
内容描述: 升压转换器, USB电源开关 [Boost Converter with USB Power Switch]
分类和应用: 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电源开关升压转换器
文件页数/大小: 19 页 / 473 K
品牌: ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
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AAT1275  
Boost Converter with USB Power Switch  
VIN(MIN) · DMAX  
L · FS  
IPP  
=
IO  
1 - D  
IP =  
IPP  
2
IPK = IP +  
IV = IP - IPP  
IV = IP - IPP = 0.9A - 0.7A = 0.20A  
2
IPK2 + IPK · IV + IV  
0.9A2 + 0.9A · 0.2A + 0.2A2  
IRMS  
=
=
= 0.59A  
3
3
For the Sumida CDRH2D14-2R2 inductor, ISAT = 1.0A, IDC(MAX) = 1.6A and DCR = 94mΩ.  
PLOSS(INDUCTOR) = I2  
·
DCR = (590mA)2 · 94mΩ = 32mW  
RMS  
5V Output Capacitor  
ΔVOUT = 0.05V  
IOUT · DMAX  
FS · ΔVOUT  
0.3A · 0.46  
800kHz · 0.05V  
COUT(MIN)  
=
=
= 3.0µF; use 4.7µF 10V MLC  
16  
1275.2007.01.1.3  
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