参数资料
型号: KA278RA05CYDTU
厂商: Fairchild Semiconductor
文件页数: 13/16页
文件大小: 0K
描述: IC REG LDO ADJ 2A TO-220FL-4
产品变化通告: Product Discontinuation Notice 17/Jan/2008
标准包装: 50
稳压器拓扑结构: 正,可调式
输出电压: 1.25 V ~ 32 V
输入电压: 最高 35V
稳压器数量: 1
电流 - 输出: 2A
工作温度: -20°C ~ 80°C
安装类型: 通孔
封装/外壳: TO-220-4 全封装(成形引线)
供应商设备封装: TO-220FL
包装: 管件
Typical Application
KA278RA05
(continued)
Input
Output
1 Vin
Vo
2
KA278RA05
R3
Ci
GND
3
Vadj
4
Co
R L
R4
1.27
Vo = 1.25 ( 1 +
R 1 //R 3
R 2 //R 4
, , 2 2 = Ω
) R 1 = 1.8k Ω R R = 0.6 0.6k Ω
Figure 39. Application Circuit (Adjustable Mode)
? C I is required if regulator is located at an appreciable distance from power supply filter.
? C O improves stability and transient response (C O > 47 μ F).
25
20
15
10
5
0
-5
-10
-50
-25
0
25
50
75
100
125
Junction temperature Tj( ℃ )
Figure 40. Internal Resistor (R 1 , R 2 ) Variation vs. Temperature (T j )
Input
1 Vin
Vo 2
Output = 5V
KA278RA05
Ci
GND
3
Vadj 4
Co
R L
Figure 41. Application Circuit (Fixed Mode)
? 2004 Fairchild Semiconductor Corporation
KA278RXXC-Series Rev. 1.1.0
13
www.fairchildsemi.com
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