参数资料
| 型号： | MIC5310-GGYML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V .15A 8MLF |
| 标准包装： | 5,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 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： | 8-VFDFN 裸露焊盘，8-MLF? |
| 供应商设备封装： | 8-MLF?（2x2） |
| 包装： | 带卷 (TR) |
?
Micrel, Inc.
Applications Information
Enable/Shutdown
The MIC5310 comes with dual active-high enable pins
that allow each regulator to be enabled 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 MIC5310 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 MIC5310 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 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.
MIC5310
Bypass Capacitor
A capacitor can be placed from the noise bypass pin
to ground to reduce output voltage noise. The
capacitor bypasses the internal reference. A 0.1μF
capacitor is recommended for applications that require
low-noise outputs. The bypass capacitor can be
increased, further reducing noise and improving
PSRR. Turn on time increases slightly with respect to
bypass capacitance. A unique, quick start circuit
allows the MIC5310 to drive a large capacitor on the
bypass pin without significantly slowing turn on time.
No-Load Stability
Unlike many other voltage regulators, the MIC5310
will remain stable and in regulation with no load. This
is especially important in CMOS RAM keep alive
applications.
Thermal Considerations
The MIC5310 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 <100μA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
P D = (3.3V – 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:
? T J(MAX) - T A
P D(MAX) =
JA
T J(max) = 125°C, the maximum junction temperature of
the die θ JA thermal resistance = 90°C/W.
The table below shows junction-to-ambient thermal
resistance for the MIC5310 in different packages.
March 2011
9
M9999-032411- C
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5310-GWYML TR | 功能描述:低压差稳压器 - LDO Dual 150mA LDO in 2mm x 2mm MLF (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 |
| MIC5310-JGYML TR | 功能描述:低压差稳压器 - LDO Dual 150mA LDO in 2mm x 2mm MLF (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 |
| MIC5310-JJYML TR | 功能描述:低压差稳压器 - LDO Dual 150mA LDO in 2mm by 2mm MLF (Lead Free Compliant) 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 |
| MIC5310-KDYML TR | 功能描述:低压差稳压器 - LDO Dual 150mA LDO in 2mm by 2mm MLF (Lead Free Compliant) 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 |
| MIC5310-KDYML-TR | 功能描述:Linear Voltage Regulator IC Positive Fixed 2 Output 2.6V, 1.85V 150mA 8-MLF? (2x2) 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:2.6V，1.85V 电流 - 输出:150mA 电压 - 跌落（典型值）:0.035V @ 150mA 稳压器数:2 电压 - 输入:2.3 V ~ 5.5 V 电流 - 限制（最小值）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 供应商器件封装:8-MLF?（2x2） 标准包装:1 |
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