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| 型号： | MIC5380-SSYFT 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 6MLF |
| 产品培训模块： | MIC5380/81 Overview |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.155V @ 150mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 150mA |
| 电流 - 限制（最小）： | 200mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-UFQFN，6-TMLF? |
| 供应商设备封装： | 6-TMLF?（1x1） |
| 包装： | 标准包装 |
| 产品目录页面： | 1106 (CN2011-ZH PDF) |
| 其它名称： | 576-3453-6 |
package. The MIC5381 includes an auto-
Thin MLF
Micrel, Inc.
Application Information
MIC5380/1 is a dual 150mA LDO in a small 1mm x 1mm
?
discharge circuit for each of the LDO outputs that is
activated when the output is disabled. The MIC5380/1
regulator is fully protected from damage due to fault
conditions through linear current limiting and thermal
shutdown.
Input Capacitor
The MIC5380/1 is a high-performance, high bandwidth
device. An input capacitor of 1μF capacitor is required
from the input-to-ground to provide stability. Low-ESR
ceramic capacitors provide optimal performance at a
minimum of space. Additional high-frequency capacitors,
such as small-valued NPO dielectric-type capacitors,
help filter out high-frequency noise and are good
practice in any RF-based circuit. X5R or X7R dielectrics
are recommended for the input capacitor. Y5V dielectrics
lose most of their capacitance over temperature and are
therefore, not recommended.
Output Capacitor
The MIC5380/1 requires an output capacitor of 1μF or
greater to maintain stability. The design is optimized for
use with low-ESR ceramic chip capacitors. High ESR
capacitors may cause high frequency oscillation. The
output capacitor can be increased, but performance has
been optimized for a 1μF ceramic output capacitor and
does not improve significantly with larger capacitance.
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature
performance. X7R-type capacitors change capacitance
by 15% over their operating temperature range and are
the most stable type of ceramic capacitors. Z5U and
Y5V dielectric capacitors change value by as much as
MIC5380/1
Enable/Shutdown
The MIC5380/1 comes with two active-high enable pins
that allow each regulator to be disabled independently.
Forcing the enable pin low disables the regulator and
sends it into a “zero” off-mode-current state. In this state,
current consumed by the regulator goes nearly to zero.
When disabled the MIC5381 switches a 30 ? (typical)
load on the regulator output to discharge the external
capacitor.
Forcing the enable pin high enables the output voltage.
The active-high enable pin uses CMOS technology and
the enable pin cannot be left floating; a floating enable
pin may cause an indeterminate state on the output.
Thermal Considerations
The MIC5380/1 is designed to provide 150mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature can
be calculated based upon the output current and the
voltage drop across the part. For example, if the input
voltage is 3.6V, and the output voltage 3.0V for V OUT1 ,
3.0V for V OUT2 and output current = 150mA, then the
actual power dissipation of the regulator circuit can be
calculated using the equation:
P D = (V IN – V OUT1 ) I OUT1 + (V IN – V OUT2 ) I OUT2 + V IN I GND
Because this device is CMOS and the ground current is
typically <100μA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
P D = (3.6V – 3.0V) × 150mA + (3.6V – 3.0V) × 150mA
P D = 0.18W
To determine the maximum ambient operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
P D(MAX) = ? ?
?
?
50% and 60%, respectively, over their operating
temperature ranges. To use a ceramic chip capacitor
with Y5V dielectric, the value must be much higher than
? T J(MAX) ? T A
? θ JA
?
?
an X7R ceramic capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
No-Load Stability
Unlike many other voltage regulators, the MIC5380/1 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
T J(max) = 125°C, and the maximum junction temperature
of the die, θ JA , thermal resistance = 150°C/W.
Substituting P D for P D(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit. The junction-to-
ambient thermal resistance for the minimum footprint is
150°C/W.
The maximum power dissipation must not be exceeded
for proper operation.
November 2008
8
M9999-110608-A
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| MIC5381-G4YFT TR | 功能描述:低压差稳压器 - LDO Dual 150mA LDO with Auto Discharge in 1.0mm x 1.0mm Thin MLF 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 |
| MIC5381-G4YFT-TR | 功能描述:Linear Voltage Regulator IC Positive Fixed 2 Output 1.8V, 1.2V 150mA 6-TMLF? (1x1) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 稳压器拓扑:正，固定式 电压 - 输出:1.8V，1.2V 电流 - 输出:150mA 电压 - 跌落（典型值）:0.155V @ 150mA 稳压器数:2 电压 - 输入:2.5 V ~ 5.5 V 电流 - 限制（最小值）:200mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFQFN，6-TMLF? 供应商器件封装:6-TMLF?（1x1） 标准包装:1 |
| MIC5381-M4YFT TR | 功能描述:低压差稳压器 - LDO Dual 150mA LDO with Auto Discharge in 1.0mm x 1.0mm Thin MLF 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 |
| MIC5381-M4YFT-TR | 功能描述:Linear Voltage Regulator IC Positive Fixed 2 Output 2.8V, 1.2V 150mA 6-TMLF? (1x1) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 稳压器拓扑:正，固定式 电压 - 输出:2.8V，1.2V 电流 - 输出:150mA 电压 - 跌落（典型值）:0.155V @ 150mA 稳压器数:2 电压 - 输入:2.5 V ~ 5.5 V 电流 - 限制（最小值）:200mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFQFN，6-TMLF? 供应商器件封装:6-TMLF?（1x1） 标准包装:1 |
| MIC5381-MGYFT TR | 功能描述:低压差稳压器 - LDO Dual 150mA LDO with Auto Discharge in 1.0mm x 1.0mm Thin MLF 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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