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| 型号： | MIC2219-PSBMLTR |
| 厂商： | MICREL INC |
| 元件分类： | 固定正电压多路输出LDO稳压器 |
| 英文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO10 |
| 封装： | 3 X 3 MM, MLF-10 |
| 文件页数： | 10/10页 |
| 文件大小： | 219K |
| 代理商： | MIC2219-PSBMLTR |
April 2005
9
M9999-042105
MIC2219
Micrel, Inc.
Functional Diagram
OUT1
FB1
OUT2
FB2
GND
EN2
CBYP
EN1
VIN
LDO1
LDO2
Reference
MIC2219 Fixed Voltage Block Diagram
Functional Description
The MIC2219 is a high performance, low quiescent current
power management IC consisting of two Cap low-dropout
regulators. The first regulator is capable of sourcing 150mA
at output voltages from 1.25V to 5V. The second regulator is
capable of sourcing 300mA of current at output voltages from
1.25V to 5V.
Enable 1 and 2
The enable inputs allow for logic control of both output
voltages with individual enable inputs. The enable input is
active high, requiring 1.8V for guaranteed operation. The
enable input is CMOS logic and cannot by left floating.
Input Capacitor
Good bypassing is recommended from input to ground to
help improve AC performance. A 1F capacitor or greater
located close to the IC is recommended.
Bypass Capacitor
The internal reference voltage of the MIC2219 can be by-
passed with a capacitor to ground to reduce output noise and
increase power supply rejection (PSRR). A quick-start fea-
ture allows for quick turn-on of the output voltage regardless
of the size of the capacitor. The recommended nominal
bypass capacitor is 0.01F, but it can be increased without
limit.
Output Capacitor
Each regulator output requires a 1F ceramic output capaci-
tor for stability. The output capacitor value can be increased
to improve transient response, but performance has been
optimized for a 1F ceramic type output capacitor.
X7R/X5R dielectric-type ceramic capacitors are recom-
mended because of their temperature performance. X7R-
type capacitors change capacitance by 15% over their oper-
ating 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 capaci-
tor with Y5V dielectric, the value must be much higher than an
X7R ceramic capacitor to ensure the same minimum capaci-
tance over the equivalent operating temperature range.
相关PDF资料 |
PDF描述 |
|---|---|
| MIC2219-PSYMLTR | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO10 |
| MIC2219 | Dynamically Adjustable Dual uCap LDO |
| MIC2219-3.0BML | Dynamically Adjustable Dual uCap LDO |
| MIC2219-3.3BML | Dynamically Adjustable Dual uCap LDO |
| MIC2341-5YTQ | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2219-PSYML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Dynamically Adjustable Dual uCap LDO |
| MIC2219-PSYML TR | 功能描述:低压差稳压器 - LDO Dynamically Adjustable Dual 150mA/300mA Cap in 3mm x 3mm 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 |
| MIC22200 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:2A Integrated Switch Synchronous Buck Regulator with Frequency Programmable from 800kHz to 4MHz |
| MIC22200YML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:2A Integrated Switch Synchronous Buck Regulator with Frequency Programmable from 800kHz to 4MHz |
| MIC22200YML TR | 功能描述:直流/直流开关调节器 2A Integrated Switch Synchronous Buck Regulator with Frequency Programmable from 800KHz to 4MHz 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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