参数资料
| 型号： | MIC5246-3.3BM5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .15A SOT23-5 |
| 标准包装： | 3,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 6V |
| 电压 - 压降（标准）： | 0.15V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA |
| 电流 - 限制（最小）： | 160mA |
| 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： | MIC5246-3.3BM5TR MIC5246-3.3BM5TR-ND |
MIC5246
The actual power dissipation of the regulator circuit can be
determined using the equation:
Fixed Regulator Applications
47k ?
Micrel
P D = (V IN – V OUT ) I OUT + V IN I GND
Substituting P D(max) for P D and solving for the operating
conditions that are critical to the application will give the
maximum operating conditions for the regulator circuit. For
example, when operating the MIC5246-3.0BM5 at 50 ° C with
V IN
MIC5246-x.xBM5
1 5
2
3
4
V OUT
1 μ F
a minimum footprint layout, the maximum input voltage for a
P D(max) = ?
235 ° C/W
?
?
set output current can be determined as follows:
? 125 ° C ? 5 0 ° C ?
?
P D(max) = 315mW
The junction-to-ambient thermal resistance for the minimum
footprint is 235 ° C/W, from Table 1. The maximum power
dissipation must not be exceeded for proper operation. Using
the output voltage of 3.0V and an output current of 150mA,
the maximum input voltage can be determined. Because this
device is CMOS and the ground current is typically 100 μ A
over the load range, the power dissipation contributed by the
ground current is < 1% and can be ignored for this calculation.
315mW = (V IN – 3.0V) 150mA
315mW = V IN · 150mA – 450mW
810mW = V IN · 150mA
V IN(max) = 5.4V
Therefore, a 3.0V application at 150mA of output current can
accept a maximum input voltage of 5.4V in a SOT-23-5
package. For a full discussion of heat sinking and thermal
effects on voltage regulators, refer to the Regulator Thermals
section of Micrel ’ s Designing with Low-Dropout Voltage Regu-
lators handbook.
Figure 1. Low-Noise Fixed Voltage Application
Figure 1 shows a standard low-noise configuration with a
47k ? pull-up resistor from the error flag to the input voltage
and a pull-down capacitor to ground for the purpose of fault
indication.
Dual-Supply Operation
When used in dual supply systems where the regulator load
is returned to a negative supply, the output voltage must be
diode clamped to ground.
MIC5246
8
June 2000
相关PDF资料 |
PDF描述 |
|---|---|
| MIC5247-1.8YML TR | IC REG LDO 1.8V .15A 6-MLF |
| MIC5248-1.2YML TR | IC REG LDO 1.2V .15A 6-MLF |
| MIC5249-2.8YMM | IC REG LDO 2.8V .3A 8-MSOP |
| MIC5252-2.85YML TR | IC REG LDO 2.85V .15A 6-MLF |
| MIC5253-2.8YC5 TR | IC REG LDO 2.8V .1A SC70-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5247 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:150mA Low-Voltage レCap Linear Regulator Preliminary Information |
| MIC5247_06 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:150mA Low-Voltage μCap Linear Regulator |
| MIC5247-1.55BM5 TR | 功能描述:IC REG LDO 1.55V .15A 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 |
| MIC5247-1.5BM5 | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC5247-1.5BM5 TR | 功能描述:IC REG LDO 1.5V .15A 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 |
发布紧急采购，3分钟左右您将得到回复。