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参数资料
| 型号： | MIC5281-5.0YMME |
| 厂商： | Micrel Inc |
| 文件页数： | 11/17页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V 25MA 8MSOP-EP |
| 标准包装： | 100 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 5V |
| 输入电压： | 最高 120V |
| 电压 - 压降（标准）： | 2V @ 25mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 25mA |
| 电流 - 限制（最小）： | 30mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 8-MSOP-EP |
| 包装： | 管件 |
| 其它名称： | 576-3920-5 |
Micrel, Inc.
Functional Description
The MIC5281 voltage regulator accepts a 6V to 120V
input and has an ultra-low 6μA typical quiescent current
while offering an excellent line transient response and
PSRR. These features make it ideal for harsh, noisy
environments. All options of the device offer 25mA of
MIC5281
Output Voltage Setting
For the MIC5281YMME and MIC5281YMM, V OUT is
programmed from 1.27V to 5.5V using Equation 1:
V OUT = V REF × ?
+ 1 ?
output current. The MIC5281YMM and MIC5281YMME
offer an adjustable output voltage from 1.27V to 5.5V.
The MIC5281-3.3YMME and MIC5281-3.3YMM offer
? R1
? R2
?
?
Eq. 1
fixed 3.3V outputs and the MIC5281-5.0YMME and
MIC5281-5.0YMM offer fixed 5.0V outputs. The YMME
packaged devices feature a heat slug to more effectively
remove heat from the die.
Applications Information
Thermal Protection
MIC5281 has internal thermal shutdown to protect it from
excessive heating of the die. When the junction
temperature exceeds approximately +155°C, the output is
disabled and the device begins to cool down. The device
turns back on when the junction temperature cools by
15°C. This will result in a cycled output during continuous
thermal-overload conditions.
Current Limit
MIC5281 features output current-limit protection. The
output sustains a continuous short circuit to GND without
damage to the device, but thermal shutdown often
results.
Input Capacitor
Connect a 1.0μF capacitor from VIN to GND. Micrel
where V REF = 1.267V, and R1 and R2 are shown in the
Typical Applications circuit.
Thermal Measurements
It is always wise to measure an IC’s case temperature to
make sure that it is within operating limits, but it is easy to
get erroneous results. The standard thermal couple that
comes with many voltage meters uses a large wire gauge
that behaves like a heat-sink, resulting in artificially low
case temperature measurements. Use a thermocouple of
36-gauge wire or smaller, such as the Omega (5SC-TT-
K-36-36), to minimize the heat-sinking effect. Also, apply
thermal compound to maximize heat transfer between the
IC and the thermocouple.
An infrared thermometer is a recommended alternative.
The IR thermometer from Optris has a 1mm spot size,
ideal for monitoring small surface mount packages. Also,
the optional stand makes it easy to keep the beam on the
IC for long periods of time.
recommends the C5750X7R2E105M,
1.0μF, 250V
capacitor made by TDK. When using a different
capacitor, assure that the voltage rating of the capacitor
exceeds any potential transient.
CPSRR Capacitor
Connect a 0.1μF capacitor from CPSRR to GND to
maintain high power supply rejection. The voltage rating
of the capacitor must be at least 14V.
Output Capacitor
Connect a 10μF capacitor from VOUT to GND. Assure
that the voltage rating of the capacitor exceeds the
designed output voltage of the MIC5281.
July 23, 2013
11
Revision 2.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5281YMM | 功能描述:线性稳压器 - 标准 120V/25mA Low Iq, High PSRR LDO RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MIC5281YMM TR | 功能描述:线性稳压器 - 标准 120V/25mA Low Iq, High PSRR LDO RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MIC5281YMME | 功能描述:线性稳压器 - 标准 120V/25mA Low Iq, High PSRR LDO RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MIC5281YMME EV | 功能描述:电源管理IC开发工具 120V/25mA Low Iq, High PSRR LDO - Evaluation Board RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MIC5281YMME TR | 功能描述:线性稳压器 - 标准 120V/25mA Low Iq, High PSRR LDO RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
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