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参数资料
| 型号： | MIC29312WT |
| 厂商： | Micrel Inc |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 3A TO-220-5 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.24 V ~ 15 V |
| 输入电压： | 2.3 V ~ 16 V |
| 电压 - 压降（标准）： | 0.6V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3A |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-5 |
| 供应商设备封装： | TO-220-5 |
| 包装： | 管件 |
| 产品目录页面： | 1107 (CN2011-ZH PDF) |
| 其它名称： | 576-2231 MIC29312WT-ND |
MIC29310/29312
and the output voltage rises. A 10mA minimum load current
is necessary for proper regulation.
Adjustable Regulator Design
V OUT
R1 = R2 × ( –—— – 1 )
1.240
Micrel
Where V O is the desired output voltage. Figure 4 shows
component de ? nition. Applications with widely varying load
currents may scale the resistors to draw the minimum load
current required for proper operation (see the table below).
Enable Input
The MIC29312 version features an enable (EN) input that
allows ON/OFF control of the device. Special design al-
lows “zero” current drain when the device is disabled—only
microamperes of leakage current ? ows. The EN input has
TTL/CMOS compatible thresholds for simple interfacing with
logic, or may be directly tied to V IN . Enabling the regulator
requires approximately 20μA of current into the EN pin.
Figure 4. Adjustable Regulator with Resistors
The adjustable regulator version, MIC29312, allows program-
ming the output voltage anywhere between 1.25V and the
15V maximum operating rating of the family. Two resistors
are used. Resistors can be quite large, up to 1M Ω , because
of the very high input impedance and low bias current of the
sense comparator. The resistor values are calculated by:
Resistor Value Table for the MIC29312 Adjustable Regulator
Voltage
Standard ( Ω )
Min. Load ( Ω )
R1
R2
R1
R2
2.85
2.9
3.0
3.1
3.15
3.3
3.45
3.6
3.8
4.0
4.1
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
76.8k
75.0k
69.8k
66.5k
64.9k
60.4k
56.2k
52.3k
48.7k
45.3k
43.2k
162
165
174
187
191
205
221
237
255
274
287
124
124
124
124
124
124
124
124
124
124
124
Note: This regulator has a minimum load requirement. “Standard” values assume the load meets this requirement. “Minimum
Load” values are calculated to draw 10mA and allow regulation with an open load (the minimum current drawn from the load
may be zero).
MIC29310/29312
8
November 2006
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC29312WU | 功能描述:低压差稳压器 - LDO 3.0A LDO Adj. + Shutdown (ROHS Compliant) 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 |
| MIC29312WU TR | 功能描述:低压差稳压器 - LDO 3.0A LDO Adj. + Shutdown (ROHS Compliant) 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 |
| MIC29371-12BT | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC29371-12BU | 制造商:Micrel Inc 功能描述:LDO Regulator Pos 12V 0.75A 6-Pin(5+Tab) TO-263 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC29371-12WT | 功能描述:低压差稳压器 - LDO 750mA LDO Fixed Voltage + Flag + Shutdown (ROHS Compliant) 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 |
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