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| 型号： | MIC29510-3.3WT |
| 厂商： | Micrel Inc |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5A 3.3V TO220-3 |
| 标准包装： | 50 |
| 应用： | 转换器，Intel Pentium? Plus |
| 输入电压： | 4.3 V ~ 8 V |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-3 |
| 供应商设备封装： | TO-220-3 |
| 包装： | 管件 |
| 产品目录页面： | 1107 (CN2011-ZH PDF) |
| 其它名称： | 576-2243 MIC29510-3.3WT-ND |
R1 = R2 × ?? OUT ? 1 ??
Micrel, Inc.
Where the regulator is powered from a source with high
AC impedance, a 0.1μF capacitor connected between
Input and GND is recommended. This capacitor should
have good characteristics to above 250kHz.
Transient Response and 5V to 3.3V Conversion
The MIC29510/2 have excellent response to variations
in input voltage and load current. By virtue of their low
dropout voltage, these devices do not saturate into
dropout as readily as similar NPN-based designs. A 3.3V
output Micrel LDO will maintain full speed and
performance with an input supply as low as 4.2V, and
will still provide some regulation with supplies down to
3.8V, unlike NPN devices that require 5.1V or more for
good performance and become nothing more than a
resistor under 4.6V of input. Micrel’s PNP regulators
provide superior performance in “5V to 3.3V” conversion
applications, especially when all tolerances are
considered.
Adjustable Regulator Design
The adjustable regulator version, MIC29512, allows
programming the output voltage anywhere between
1.25V and the 16V maximum operating rating of the
family. Two resistors are used. Resistors can be quite
large, up to 100k ? , because of the very high input
impedance and low bias current of the sense
comparator. The resistor values are calculated by:
? V ?
? 1.240 ?
MIC29510/29512
Where V O is the desired output voltage. Figure 4 shows
component definition.
Adjustable Regulator Design
Figure 4. Adjustable Regulator with Resistors
Enable Input
The MIC29512 version features an enable (EN) input
that allows ON/OFF control of the device. Special design
allows “zero” current drain when the device is disabled—
only microamperes of leakage current flows. 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.
Voltage
R1
Standard ( ? )
R2
2.85
2.9
3.0
3.1
3.15
3.3
3.45
3.525
3.6
3.8
4.0
4.1
100k
100k
100k
100k
100k
100k
100k
93.1k
100k
100k
100k
100k
76.8k
75.0k
69.8k
66.5k
64.9k
60.4k
56.2k
51.1k
52.3k
48.7k
45.3k
43.2k
Resistor Value Table for the MIC29512 Adjustable Regulator
May 2006
8
M9999-051706
(408) 955-1690
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC295103BM | 制造商:MICREL 功能描述:New |
| MIC2951-03BM | 功能描述:IC REG LDO 5V/ADJ .15A 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.8V 输入电压:最高 16V 电压 - 压降（标准）:0.3V @ 80mA 稳压器数量:1 电流 - 输出:80mA 电流 - 限制（最小）:- 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:MIC5203-3.8BM5TRMIC5203-3.8BM5TR-ND |
| MIC2951-03BM TR | 功能描述:IC REG LDO 5V/ADJ .15A 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:45 系列:- 稳压器拓扑结构:正，固定式 输出电压:5V 输入电压:6 V ~ 30 V 电压 - 压降（标准）:0.47V @ 250mA 稳压器数量:1 电流 - 输出:250mA 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-220-3 供应商设备封装:TO-220-3 包装:管件 产品目录页面:1289 (CN2011-ZH PDF) 其它名称:*LP2954AIT*LP2954AIT/NOPBLP2954AIT |
| MIC2951-03BMM | 功能描述:IC REG LDO 5V/ADJ .15A 8-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.8V 输入电压:最高 16V 电压 - 压降（标准）:0.3V @ 80mA 稳压器数量:1 电流 - 输出:80mA 电流 - 限制（最小）:- 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:MIC5203-3.8BM5TRMIC5203-3.8BM5TR-ND |
| MIC2951-03BMM TR | 功能描述:IC REG LDO 5V/ADJ .15A 8-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.8V 输入电压:最高 16V 电压 - 压降（标准）:0.3V @ 80mA 稳压器数量:1 电流 - 输出:80mA 电流 - 限制（最小）:- 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:MIC5203-3.8BM5TRMIC5203-3.8BM5TR-ND |
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