参数资料
| 型号： | MIC5327-2.8YMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.8V .3A 4-TMLF |
| 产品培训模块： | MIC23xxx HyperLight Load™ Regulators |
| 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）： | 0.18V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA |
| 电流 - 限制（最小）： | 400mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 4-UFDFN 裸露焊盘，4-TMLF? |
| 供应商设备封装： | 4-TMLF?（1.2x1.6） |
| 包装： | 标准包装 |
| 产品目录页面： | 1094 (CN2011-ZH PDF) |
| 其它名称： | 576-3266-6 |
Micrel, Inc.
Applications Information
The MIC5327 is a low quiescent current, low dropout
regulator designed for optimal performance in a small
space. The MIC5327 regulator is fully protected from
damage due to fault conditions, offering linear current
limiting and thermal shutdown.
Input Supply Voltage
V IN provides the supply to power the LDO. The minimum
input voltage is 2.3V allowing conversion from typical
lithium ion batteries and low voltage supplies.
Input Capacitor
The MIC5327 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 with
minimum space required. Additional high frequency
capacitors, such as small value NPO dielectric type
capacitors, help filter out high frequency noise and are
good practice in any RF circuit.
Output Capacitor
MIC5327
uses CMOS technology and cannot be left floating; a
floating enable pin may cause an unknown output state.
Thermal Considerations
The MIC5327 is designed to provide 300mA continuous
output current from a very small footprint package.
Maximum ambient operating temperature can be
calculated based on the output current and the voltage
drop across the part. For example: given that the input
voltage is 3.6V, the output voltage is 2.8V and the output
current is 300mA. The 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) × 300mA
P D = 0.24W
To determine the maximum ambient operating
temperature use the junction to ambient thermal
resistance of the device and the following basic
equation:
P D(max) = ? ?
?
?
The MIC5327 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
? T J(max) ? T A
? θ JA
?
?
capacitors may cause high frequency oscillation. The
output capacitor can be increased, but performance has
been optimized for a 1μF ceramic output capacitor.
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. 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.
Minimum Load Current
The MIC5327 does not require a minimum load to
maintain output voltage regulation.
Enable/Shutdown
The MIC5327 comes with an active high enable pin that
enables the regulator. 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. The active high enable pin
The maximum junction temperature of the die, T J(max) =
125°C.The package thermal resistance, θ JA = 173°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.
For example, when operating the MIC5327 at an input
voltage of 3.6V and 300mA load with a minimum
footprint layout, the maximum ambient operating
temperature T A can be determined as follows:
0.24W = (125°C – T A )/(173°C/W)
T A = 83°C
Therefore a 2.8V 300mA application can accept an
ambient operating temperature of 83.0°C in a 1.2mm x
1.6mm Thin MLF ? package. For a full discussion of heat
sinking and thermal effects on voltage regulators, refer
to the “Regulator Thermals” section of Micrel’s Designing
with Low Dropout Voltage Regulators handbook. This
information can be found on Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
September 2008
7
M9999-093008-A
相关PDF资料 |
PDF描述 |
|---|---|
| MIC5330-MKYML TR | IC REG LDO 2.8V/2.6V .3A 8-MLF |
| MIC5331-J4YMT TR | IC REG LDO 2.5V/1.2V .3A 8TMLF |
| MIC5332-MMYMT TR | IC REG LDO 2.8V .3A 8TMLF |
| MIC5333-PNYMT TR | IC REG LDO 3V/2.85V .3A 10TMLF |
| MIC5335-MFYMT TR | IC REG LDO 2.8V/1.5V .3A 6-MLF |
相关代理商/技术参数 |
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| MIC5330-GFYML TR | 功能描述:低压差稳压器 - LDO Dual 300mA 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 |
| MIC5330-GFYMLTR | 制造商:RF Micro Devices Inc 功能描述: |
| MIC5330-GGYML TR | 功能描述:低压差稳压器 - LDO Dual 300mA 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 |
| MIC5330-GWYML TR | 功能描述:低压差稳压器 - LDO Dual 300mA 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 |
| MIC5330-JGYML | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
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