参数资料
型号: MIC5233-3.3BM5 TR
厂商: Micrel Inc
文件页数: 10/12页
文件大小: 0K
描述: IC REG LDO 3.3V .1A SOT23-5
标准包装: 3,000
稳压器拓扑结构: 正,固定式
输出电压: 3.3V
输入电压: 高达 36V
电压 - 压降(标准): 0.27V @ 100mA
稳压器数量: 1
电流 - 输出: 100mA
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: SC-74A,SOT-753
供应商设备封装: SOT-23-5
包装: 带卷 (TR)
其它名称: MIC5233-3.3BM5TR
MIC5233-3.3BM5TR-ND
Micrel, Inc.
Total power dissipation is calculated using the following
equation:
MIC5233
Maximum input voltage for a 10mA load current at 50°C
ambient temperature is 34.9V, utilizing virtually the entire
operating voltage range of the device.
P D = (V IN ? V OUT )I OUT + V IN × I GND
Eq. 4
Adjustable Regulator Application
The MIC5233BM5 can be adjusted from 1.24V to 20V by
Due to the potential for input voltages up to 36V, ground
current must be taken into consideration.
If we know the maximum load current, we can solve for
using two external resistors (Figure 1). The resistors set
the output voltage based on the following equation:
V OUT = V REF ? ? 1 + ?
? ? ?
the maximum input voltage using the maximum power
dissipation calculated for a 50°C ambient, 319mV.
? ? R1 ? ?
? ? R2 ? ?
Eq. 8
P D(MAX) = (V IN ? V OUT )I OUT + V IN × I GND
319mW = (V IN ? 3V)100mA + V IN × 2.8mA Eq. 5
Ground pin current is estimated using the typical
characteristics of the device.
619mW = VIN (102.8mA)
where V REF = 1.24V.
Feedback resistor R2 should be no larger than 300k Ω .
V IN = 6.02V
Eq. 6
For higher current outputs only a lower input voltage will
work for higher ambient temperatures.
Assuming a lower output current of 10mA, the maximum
input voltage can be recalculated:
319mW = (V IN ? 3V)10mA + V IN × 0.1mA
349mW = V IN × 10.1mA
V IN = 34.9V
Eq. 7
Figure 1. Adjustable Voltage Application
July 2012
10
M9999-071212-B
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