参数资料
| 型号： | MIC5320-46MYMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 4.6V/2.8V .15A 6-TMLF |
| 标准包装： | 5,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 4.6V，2.8V |
| 输入电压： | 2.3 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.035V @ 150mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 150mA |
| 电流 - 限制（最小）： | 300mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-UFDFN 裸露焊盘，6-TMLF? |
| 供应商设备封装： | 6-TMLF?（1.6x1.6） |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC5320-46MYMTTR MIC5320-46MYMTTR-ND |
Micrel, Inc.
Applications Information
Enable/Shutdown
The MIC5320 comes with dual 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. 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.
Input Capacitor
The MIC5320 is a high-performance, high bandwidth
device. Therefore, it requires a well-bypassed input
supply for optimal performance. A 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.
Output Capacitor
The MIC5320 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
MIC5320
Thermal Considerations
The MIC5320 is designed to provide 150mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature
can be calculated based on the output current and the
voltage drop across the part. Given that the input
voltage is 3.3V, the output voltage is 2.8V for V OUT1 ,
1.5V for V OUT2 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 OUT1 + (V IN – V OUT2 ) I OUT2 +
V IN I GND
Because this device is CMOS and the ground current
is typically <150μA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
P D = (3.3V – 2.8V) × 150mA + (3.3V -1.5) ×
150mA
P D = 0.345W
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:
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
P D(MAX) =
?
?
T J(MAX) - T A
JA
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
T J(max) = 125°C, the maximum junction temperature of
the die θ JA thermal resistance = 100°C/W.
The table below shows junction-to-ambient thermal
resistance for the MIC5320 in different packages.
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.
Package
6-Pin 1.6x1.6 Thin MLF ?
θ JA Recommended
Minimum Footprint
100°C/W
θ JC
2°C/W
No-Load Stability
Unlike many other voltage regulators, the MIC5320
will remain stable and in regulation with no load. This
is especially important in CMOS RAM keep-alive
applications.
Thermal Resistance
February 2011
10
M9999-021111-H
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC-5320A0-S1E | 制造商:ADVANTECH 制造商全称:Advantech Co., Ltd. 功能描述:AdvancedTCA? 10GbE CPU Blade with Intel? Xeon? 5500 Series Processor |
| MIC-5320A1-S1E | 制造商:ADVANTECH 制造商全称:Advantech Co., Ltd. 功能描述:AdvancedTCA? 10GbE CPU Blade with Intel? Xeon? 5500 Series Processor |
| MIC-5320A2-S1E | 制造商:ADVANTECH 制造商全称:Advantech Co., Ltd. 功能描述:AdvancedTCA? 10GbE CPU Blade with Intel? Xeon? 5500 Series Processor |
| MIC5320-GFYD6 TR | 功能描述:低压差稳压器 - LDO Dual 150mA LDO Thin SOT Dual Enable (Lead Free) 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 |
| MIC5320-GFYD6TR | 制造商:RF Micro Devices Inc 功能描述: |
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