参数资料
| 型号： | MIC5373-MG4YMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 17/22页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.8V/1.8V/1.2V 16MLF |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.8V，1.8V，1.2V |
| 输入电压： | 1.7 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.17V @ 150mA，0.275V @ 150mA，0.275V @ 150mA |
| 稳压器数量： | 3 |
| 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： | 16-UFQFN 裸露焊盘，16-MLF? |
| 供应商设备封装： | 16-MLF（2.5x2.5） |
| 包装： | 标准包装 |
| 其它名称： | 576-3911-6 |
Micrel, Inc.
Application Information
MIC5373/83 is a triple output device with three 200mA
LDOs. The MIC5373/83 incorporates a POR function
with the capability to monitor any voltage using POR_IN.
The monitored voltage can be set to any voltage
threshold level to trigger the POR flag. A delay on the
POR flag may also be set with an external capacitor at
the DLY pin. All the LDOs have current limit and thermal
shutdown protection to prevent damage from fault
conditions. MIC5373 has active high enables while the
MIC5383 has active low enables.
Input Capacitor
MIC5373/83
Thermal Considerations
The MIC5373/83 is designed to provide three outputs up
to 200mA each 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
voltages are 3.6V and the output voltages are 3.3V,
2.5V, and 1.8V each with an output current = 150mA.
The actual power dissipation of the regulator circuit can
be determined using Equation 2:
P D = (V INLDO1/2 – V OUT1 ) I OUT1 +
The MIC5373/83 is a high-performance, high-bandwidth
device. An input capacitor of 1μF from the input pin to
ground is required to provide stability. Low-ESR ceramic
capacitors provide optimal performance in small board
(V INLDO1/2 – V OUT2 ) I OUT2 +
(V INLDO3 – V OUT3 ) I OUT3 + V IN x I GND
Eq. 2
area. 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 MIC5373/83 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.
As the MIC5373/83 is a CMOS device, the ground current
is typically <100μA over the load range, the power
dissipation contributed by the ground current is <1% and
may be ignored for this calculation, as illustrated in
Equation 3:
P D ≈ (3.6V – 2.8V)150mA+(3.6V-1.8V)150mA+
(3.6V-1.2V)150mA
P D ≈ 0.75W Eq. 3
To determine the maximum ambient operating
temperature of the package, use the junction to ambient
thermal resistance of the device and Equation 4:
P D(MAX) = ? ?
?
?
X7R and X5R dielectric ceramic capacitors are
recommended because of their temperature
performance. X7R capacitors change capacitance by
15% over their operating temperature range and are the
? T J(MAX) ? T A
? θ JA
?
?
Eq. 4
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 MIC5373/83
will remain stable and in regulation with no load.
T J(MAX) = 125°C
θ JA = 100°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 maximum power dissipation must not be exceeded
for proper operation.
September 2012
17
M9999-091712
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相关代理商/技术参数 |
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| MIC5373-SJGYMT TR | 功能描述:低压差稳压器 - LDO Triple 200mA LDO w/User Defined Voltage Monitoring 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 |
| MIC5373-SJGYMT-TR | 功能描述:Linear Voltage Regulator IC Positive Fixed 3 Output 3.3V, 2.5V, 1.8V 200mA 16-TMLF? (2.5x2.5) 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:3.3V，2.5V，1.8V 电流 - 输出:200mA 电压 - 跌落（典型值）:0.17V @ 150mA，0.275V @ 150mA，0.275V @ 150mA 稳压器数:3 电压 - 输入:1.7 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:16-UFQFN 裸露焊盘，16-MLF? 供应商器件封装:16-TMLF?（2.5x2.5） 标准包装:1 |
| MIC5374-MG44YMT TR | 功能描述:低压差稳压器 - LDO Triple 200mA LDO w/User defined voltage monitoring and real time clock 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 |
| MIC5374-MG44YMT-TR | 功能描述:Linear Voltage Regulator IC Positive Fixed 4 Output 2.8V, 1.8V, 1.2V, 1.2V 200mA, 200mA, 200mA, 1mA 16-TMLF? (2.5x2.5) 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，1.8V，1.2V，1.2V 电流 - 输出:200mA，200mA，200mA，1mA 电压 - 跌落（典型值）:0.17V @ 150mA，0.275V @ 150mA，0.275V @ 150mA，0.275V @ 150mA 稳压器数:4 电压 - 输入:1.7 V ~ 5.5 V 电流 - 限制（最小值）:200mA，200mA，200mA，2mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-UFQFN 裸露焊盘，16-MLF? 供应商器件封装:16-TMLF?（2.5x2.5） 标准包装:1 |
| MIC5374-SJG1YMT TR | 功能描述:低压差稳压器 - LDO Triple 200mA LDO w/User defined voltage monitoring and real time clock 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 |
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