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参数资料
| 型号： | MIC37110-1.8YMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V 1A 6MLF |
| 特色产品： | MIC37110/112 and MIC37120/122 LDOs |
| 标准包装： | 5,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 输入电压： | 2.375 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.23V @ 1A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1A |
| 电流 - 限制（最小）： | 1.2A |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-VDFN 裸露焊盘 |
| 供应商设备封装： | 6-MLF?（2x2） |
| 包装： | 带卷 (TR) |
Micrel, Inc.
Lower thermal resistance is achieved by joining the four
ground leads with the die attach paddle to create a
single-piece electrical and thermal conductor. This
concept has been used by MOSFET manufacturers for
years, proving very reliable and cost effective for the
user.
MIC37110/MIC37112
MIC37120/MIC37122
Low-dropout linear regulators from Micrel are rated to a
maximum junction temperature of 125°C. It is important
not to exceed this maximum junction temperature during
operation of the device. To prevent this maximum
junction temperature from being exceeded, the
appropriate ground plane heat sink must be used.
Thermal resistance consists of two main elements, θ JC
(junction-to- case thermal resistance) and θ CA (case-to-
ambient thermal resistance). See Figure 3. θ JC is the
resistance from the die to the leads of the package. θ CA
is the resistance from the leads to the ambient air and it
includes θ CS (case-to-sink thermal resistance) and θ SA
(sink-to-ambient thermal resistance).
Figure 4. Copper Area vs. Power SO-8 Power Dissipation
Figure 4 shows copper area versus power dissipation
with each trace corresponding to a different temperature
rise above ambient.
From these curves, the minimum area of copper
necessary for the part to operate safely can be
determined. The maximum allowable temperature rise
Figure 3. Thermal Resistance
Using the power SOIC- 8 reduces the θ JC dramatically
and allows the user to reduce θ CA . The total thermal
resistance, θ JA (junction-to-ambient thermal resistance)
is the limiting factor in calculating the maximum power
dissipation capability of the device. Typically, the power
SOIC- 8 has a θ JC of 20°C/W, this is significantly lower
than the standard SOIC- 8 which is typically 75°C/W. θ CA
is reduced because pins 5 through 8 can now be
soldered directly to a ground plane which significantly
reduces the case-to-sink thermal resistance and sinks to
ambient thermal resistance.
must be calculated to determine operation along which
curve:
ΔT = T J(max) – T A(max)
T J(max) = 125°C
T A(max) = maximum ambient operating
temperature.
For example, the maximum ambient temperature is
50°C, the ΔT is determined as follows:
ΔT = 125°C – 50°C
ΔT = 75°C
Using Figure 4, the minimum amount of required copper
can be determined based on the required power
dissipation. Power dissipation in a linear regulator is
calculated as follows:
P D = (V IN – V OUT ) I OUT + V IN × I GND
December 2012
16
M9999-121312-A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC37112YM | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High-Performance, Low-Noise, 1A LDOs |
| MIC37112YM TR | 功能描述:低压差稳压器 - LDO High Performance, Low Noise 1A LDO 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 |
| MIC37112YMT | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High-Performance, Low-Noise, 1A LDOs |
| MIC37112YMT TR | 功能描述:低压差稳压器 - LDO High Performance, Low Noise 1A LDO 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 |
| MIC37112YMTR | 制造商:Micrel 功能描述:LDO Regulator 1A Adj. 2% Low Noise SOIC8 |
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