参数资料
型号: SPX1117M3-L-5-0
厂商: Exar Corporation
文件页数: 8/11页
文件大小: 0K
描述: IC REG LDO 5V .8A SOT223-3
标准包装: 78
稳压器拓扑结构: 正,固定式
输出电压: 5V
输入电压: 最高 15V
电压 - 压降(标准): 1.1V @ 800mA
稳压器数量: 1
电流 - 输出: 800mA
电流 - 限制(最小): 1A
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: TO-261-4,TO-261AA
供应商设备封装: SOT-223
包装: 管件
其它名称: 1016-1238
S P X 1 1 1 7
8 0 0 m A L o w D r o p o u t V o l t a g e R e g u l a t o r
P RE -B IAS O UTPUT V OLTAGE S TART -U P
The SPX1117 is not intended for operations
requiring start-up into a pre-biased load.
Proper discharge of the output voltage is
recommended prior of turning on the device
through the application of the input voltage.
L AYOUT C ONSIDERATIONS
Parasitic line resistance can degrade local
regulation. In order to avoid this, connect R 1
directly to V OUT as illustrated in figure 25. For
the same reason R 2 should be connected to
the negative side of the load.
Fig. 21: Current Cource
Fig. 24: 5V Regulator with Shutdown
Fig. 25: Recommended Connections for Best Results
PC Board
mm 2
2500
2500
2500
2500
2500
1600
2500
Topside
Copper
mm 2
2500
1250
950
2500
1800
600
1250
Backside
Copper
mm 2
2500
2500
2500
0
0
1600
0
Thermal
Resistance
Jct to amb.
°C/W
46
47
49
51
53
55
58
Fig. 22:Typical Adjustable Regulator
2500
1600
900
900
915
600
240
240
0
0
900
0
59
67
72
85
Table 1
Fig. 23: Improving Ripple Rejection
? 2011 Exar Corporation
8/11
Rev. 2.1.0
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