参数资料
型号: KA278R05CYDTU
厂商: Fairchild Semiconductor
文件页数: 2/16页
文件大小: 0K
描述: IC REG LDO 5V 2A TO-220FL-4
标准包装: 1,000
稳压器拓扑结构: 正,固定式
输出电压: 5V
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
Block Diagram
Vin
1
Q1
2
Vo
Vin
1
Q1
2 Vo
THERMAL SHUTDOWN
BANDGAP REFERENCE
-
OVERVOLTAGE
PROTECTION
THERMAL SHUTDOWN
BANDGAP REFERENCE
OVERVOLTAGE
PROTECTION
-
HIGH / LOW
OUTPUT
+
SOA PROTECTION
R1
+
SOA PROTECTION
Rin
Vdis
4
-
+
ON / OFF
4
Vadj
R2
1.4V
SHORTCIRCUIT
PROTECTION
SHORTCIRCUIT
PROTECTION
Rref
3
3
GND
Figure 1. KA278R33 / 05 / 12C
GND
Figure 2. KA278RA05C
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only. Values are at T A = 25°C unless otherwise noted.
Symbol
V IN
Input Voltage
Parameter
Value
35
Unit
V
V dis
I O
P D 1
P D 2
T j
T opr
R θ jc
R θ ja
Disable Voltage
Output Current
Power Dissipation 1
Power Dissipation 2
Junction Temperature
Operating Temperature
Thermal Resistance, Junction-to Case (1)
Thermal Resistance, Junction-to-Air
KA278RXXC
No Heat-Sink
With Heat-Sink
35
2.0
1.5
15
150
-20 to 80
2.9
48.51
V
A
W
W
° C
° C
° C/W
° C/W
Note:
1. Junction-to-case thermal resistance test environments:
- Pneumatic heat sink fixture;
- Clamping pressure 60 psi through 12 mm diameter cylinder;
- Thermal grease applied between PKG and heat sink fixture.
? 2004 Fairchild Semiconductor Corporation
KA278RXXC-Series Rev. 1.1.0
2
www.fairchildsemi.com
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