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| 型号： | MIC2225-4KYMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 12/15页 |
| 文件大小： | 354K |
| 描述： | IC REG DL BUCK/LINEAR 10TMLF |
| 标准包装： | 1 |
| 拓扑： | 降压（降压）（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 2MHz |
| 电压/电流 - 输出 1： | 1.2V，600mA |
| 电压/电流 - 输出 2： | 2.6V，300mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-UFDFN，10-TMLF? |
| 供应商设备封装： | 10-TMLF?（2x2） |
| 包装： | 标准包装 |
| 产品目录页面： | 1092 (CN2011-ZH PDF) |
| 其它名称： | 576-3100-6 |
Micrel, Inc.
MIC2225
February 2008
12
M9999-022008-D
Application Information
The MIC2225 is a 600mA PWM and 300mA LDO dual
power supply. Both PWM output and LDO outputs are
independent and are controlled by EN and ENLDO pins
respectively. These enable pins are logic level
compatible.
Input Capacitor
A minimum 1礔 ceramic is recommended on the VIN pin
for bypassing. X5R or X7R dielectrics are recommended
for the input capacitor. Y5V dielectrics loose most of
their capacitance over temperature and are therefore,
not recommended.
A minimum 1礔 is recommended for placement close to
the VIN and PGND pins for high frequency filtering.
Smaller case size capacitors are recommended due to
their lower ESR and ESL. Please refer to layout
recommendations for proper layout of the input
capacitor.
Output Capacitor
Even though the MIC2225 is optimized for a 2.2礔
output capacitor, output capacitance can be varied from
1礔 to 10礔. The MIC2225 utilizes Type III internal
compensation and utilizes an internal high frequency
zero to compensate for the double pole roll off of the LC
filter. For this reason, larger output capacitors can create
instabilities. X5R or X7R dielectrics are recommended
for the output capacitor. Y5V dielectrics lose most of
their capacitance over temperature and are therefore,
not recommended.
In addition to a 2.2礔, a small 10nF is recommended
close to the load for high frequency filtering. Smaller
case size capacitors are recommended due to there
lower ESR and ESL.
Inductor Selection
The MIC2225 is designed for use with a 2.2礖 inductor.
Proper selection should ensure that the inductor can
handle the maximum average and peak currents
required by the load. Maximum current ratings for the
inductor are generally given in two methods; permissible
DC current and saturation current. Permissible DC
current can be rated either for a 40癈 temperature rise
or a 10% to 20% loss in inductance. Ensure that the
inductor selected can handle the maximum operating
current. When saturation current is specified, make sure
that there is enough margin so that the peak current will
not saturate the inductor. Peak inductor current can be
calculated as follows:
L
f
2
V
V
1
V
I
I
IN
OUT
OUT
OUT
PK
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?/DIV>
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+
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2225-4MYMT | 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: |
| MIC2225-4MYMT TR | 功能描述:直流/直流开关调节器 Ultra Small Dual Channel DC/DC + LDO RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC2225-4MYMT-TR | 功能描述:Linear And Switching Voltage Regulator IC 2 Output Step-Down (Buck) (1), Linear (LDO) (1) 2MHz 10-UFDFN, 10-TMLF? 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 拓扑:降压（降压）（1），线性（LDO）（1） 功能:任何功能 输出数:2 频率 - 开关:2MHz 电压/电流 - 输出 1:1.2V，600mA 电压/电流 - 输出 2:2.8V，300mA 电压/电流 - 输出 3:- 带 LED 驱动器:无 带监控器:无 带定序器:无 电压 - 电源:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFDFN，10-TMLF? 供应商器件封装:10-TMLF?（2x2） 标准包装:1 |
| MIC2225-4OYMT | 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: |
| MIC2225-4OYMT TR | 功能描述:直流/直流开关调节器 Ultra Small Dual Channel DC/DC + LDO RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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