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参数资料
| 型号： | MIC5216-3.3BM5 |
| 厂商： | MICREL INC |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 500mA-Peak Output LDO Regulator Preliminary Information |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO5 |
| 封装： | TINY, SOT-23, 5 PIN |
| 文件页数： | 2/13页 |
| 文件大小： | 288K |
| 代理商： | MIC5216-3.3BM5 |
Micrel, Inc.
MIC5216
March 2007
10
M9999-032307
1.66W
100
Cycle
%Duty
455mW
=
=
100
Cycle
%Duty
274
.
0
% Duty Cycle Max = 27.4%
With an output current of 500mA and a three-volt drop
across the MIC5216-xxBMM, the maximum duty cycle is
27.4%.
Applications also call for a set nominal current output
with a greater amount of current needed for short
durations. This is a tricky situation, but it is easily
remedied. Calculate the average power dissipation for
each current section, then add the two numbers giving
the total power dissipation for the regulator. For
example, if the regulator is operating normally at 50mA,
but for 12.5% of the time it operates at 500mA output,
the total power dissipation of the part can be easily
determined. First, calculate the power dissipation of the
device at 50mA. We will use the MIC5216-3.3BM5 with
5V input voltage as our example.
PD × 50mA = (5V – 3.3V) × 50mA + 5V × 650A
PD × 50mA = 173mW
However, this is continuous power dissipation, the actual
on-time for the device at 50mA is (100%-12.5%) or
87.5% of the time, or 87.5% duty cycle. Therefore, PD
must be multiplied by the duty cycle to obtain the actual
average power dissipation at 50mA.
PD × 50mA = 0.875 × 173mW
PD × 50mA = 151mW
The power dissipation at 500mA must also be
calculated.
PD × 500mA = (5V – 3.3V) 500mA + 5V × 20mA
PD × 500mA = 950mW
This number must be multiplied by the duty cycle at
which it would be operating, 12.5%.
PD × = 0.125mA × 950mW
PD × = 119mW
a. 25
°C Ambient
b. 50
°C Ambient
c. 85
°C Ambient
Figure 1. MIC5216-x.xBM5 (SOT-23-5) on Minimum Recommended Footprint
a. 25
°C Ambient
b. 50
°C Ambient
c. 85
°C Ambient
Figure 2. MIC5216-x.xBM5 (SOT-23-5) on 1-inch
2 Copper Cladding
相关PDF资料 |
PDF描述 |
|---|---|
| MIC5216-3.3BMM | 500mA-Peak Output LDO Regulator Preliminary Information |
| MIC5156-3.3BN | Super LDO⑩ Regulator Controller |
| MIC5156-5.0BM | Super LDO⑩ Regulator Controller |
| MIC5216-5.0BM5 | 500mA-Peak Output LDO Regulator Preliminary Information |
| MIC5216-5.0BMM | 500mA-Peak Output LDO Regulator Preliminary Information |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5216-4.0BM5 TR | 功能描述:IC REG LDO 4V .5A SOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:500 系列:- 稳压器拓扑结构:正，固定式 输出电压:12V 输入电压:14.5 V ~ 35 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:500mA 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:TO-205AD，TO-39-3 金属罐 供应商设备封装:TO-39 包装:散装 其它名称:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
| MIC5216-4.0YM5 TR | 功能描述:低压差稳压器 - LDO 500mA Peak 1% Low Noise LDO w/Flag (Lead Free) RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MIC5216-40BM5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC5216-5.0 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC5216-5.0BM5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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