参数资料
| 型号： | MIC5376-2.8YC5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.8V .15A SC70-5 |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.8V |
| 输入电压： | 最高 5.5V |
| 电压 - 压降（标准）： | 0.12V @ 150mA |
| 稳压器数量： | 1 |
| 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-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1106 (CN2011-ZH PDF) |
| 其它名称： | 576-3383-6 |
VIN VOUT 3
C1
C2
2.2μF
2.2μF
6.3V
6.3V
EN
ADJ
GND
R2
267k
Micrel, Inc.
Application Information
MIC5375/6/7/8 is Low noise 150mA LDO. The
MIC5376/8 includes an auto-discharge circuit that is
switched on when the regulator is disabled through the
enable pin. The MIC5375/6/7/8 regulator is protected
from damage due to fault conditions, offering linear
current limiting and thermal shutdown.
Input Capacitor
The MIC5375/6/7/8 is a high-performance, high
bandwidth device. An input capacitor of 1μF 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
MIC5375/6/7/8
Enable/Shutdown
The MIC5375/6/7/8 is provided with an active-high
enable pin that allows the regulator to be disabled.
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.
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.
Adjustable Regulator Design
The MIC5377/8 adjustable version allows setting the
output voltage down to 1V with the use of two external
feedback resistors.
U1 MIC5377/8-xxYMT
J1 2 J3
VIN VOUT
R1
619k
J5 1 7
EN
4,5,6,8
J2 J4
GND GND
V OUT = V REF ? ? 1 +
R 1 ?
R 2 ? ?
For output voltages ≥ 2.5V, the MIC5375/6/7/8 requires
a minimum 1μF output capacitor. For output voltages
below 2.5V a 2.2μF minimum output capacitor is
required. The design is optimized for use with low-ESR
?
?
?
ceramic chip capacitors. High ESR capacitors are not
recommended because they may cause high frequency
oscillation. The output capacitor can be increased, but
performance 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
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
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 MIC5375/6/7/8
will remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
Thermal Considerations
The MIC5375/6/7/8 is designed to provide 150mA of
continuous current in a very small package. Maximum
ambient operating temperature can be calculated based
on the output current and the voltage drop across the
part. For example if the input voltage is 3.6V, the output
voltage is 2.8V, and the output current = 150mA. The
actual power dissipation of the regulator circuit can be
determined using the equation:
P D = (V IN – V OUT1 ) I OUT + 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 – 2.8V) × 150mA
P D = 0.12W
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) = ? ?
?
?
applications.
? T J(max) ? T A
? θ JA
?
?
T J(max) = 125°C, the maximum junction temperature of the
die, θ JA thermal resistance = 250°C/W for the YMT
package and 256.5°C/W for the SC-70-5 package.
January 2009
8
M9999-011309-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5377YC5 TR | 功能描述:低压差稳压器 - LDO Low Dropout Single 150mA LDO in 5ld SC70 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 |
| MIC5377YC5-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 1.5 V ~ 4.5 V 150mA SC-70-5 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，可调式 电压 - 输出:1.5 V ~ 4.5 V 电流 - 输出:150mA 电压 - 跌落（典型值）:0.12V @ 150mA 稳压器数:1 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:5-TSSOP，SC-70-5，SOT-353 供应商器件封装:SC-70-5 标准包装:1 |
| MIC5377YMT TR | 功能描述:低压差稳压器 - LDO Low Dropout Single 150mA LDO in 1.2mm x 1.2mm TMLF 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 |
| MIC5377YMT-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 1.5 V ~ 4.5 V 150mA 8-TMLF? (1.2x1.2) 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，可调式 电压 - 输出:1.5 V ~ 4.5 V 电流 - 输出:150mA 电压 - 跌落（典型值）:0.12V @ 150mA 稳压器数:1 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:8-UFDFN 裸露焊盘，8-TMLF? 供应商器件封装:8-TMLF?（1.2x1.2） 标准包装:1 |
| MIC5378YC5 TR | 功能描述:低压差稳压器 - LDO Low Dropout Single 150mA LDO WITH Active Shutdown in 5ld SC70 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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