参数资料
| 型号： | MIC2211-YMYML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 9/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.9V/2.8V 10-MLF |
| 标准包装： | 5,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.9V，2.8V |
| 输入电压： | 2.25 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.12V @ 150mA，0.24V @ 300mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 150mA，300mA |
| 电流 - 限制（最小）： | 150mA，300mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘，10-MLF? |
| 供应商设备封装： | 10-MLF?（3x3） |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC2211-YMYMLTR MIC2211-YMYMLTR-ND |
MIC2211
Functional Description
Adjustable Regulator Design
Micrel, Inc.
The MIC2211 is a high performance, low quiescent current,
power management IC consisting of two μ Cap low dropout
regulators. The ?rst 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.
R1
R2
VOUT1
ADJ1
GND
VOUT2
ADJ2
R1
R2
Enable 1 and 2
V OUT
1.250
Theenableinputsallowforlogiccontrolofbothoutputvolt-
ages 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 ?oating.
Input Capacitor
Good bypassing is recommended from input to ground to
help improve AC performance. A 1 μ F capacitor or greater
located close to the IC is recommended.
Bypass Capacitor
The internal reference voltage of the MIC2211 can be bypassed
with a capacitor to ground to reduce output noise and increase
power supply rejection (PSRR). A quick-start feature allows
for quick turn-on of the output voltage regardless of the size
of the capacitor. The recommended nominal bypass capacitor
is 0.01 μ F, but it can be increased without limit.
Output Capacitor
Each regulator output requires a 1 μ F ceramic output capaci-
tor for stability. The output capacitor value can be increased
to improve transient response, but performance has been
optimized for a 1 μ F 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 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 operat-
ing 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.
MIC2211 Adjustable Regulator Design
The MIC2211 allows the programming of the output voltages
1 and 2 anywhere between 1.25V and 5.5V, the maximum
operating rating of the part. Two resistors are required for each
output. Appropriate resistor values are required to prevent
the low quiescent current performance being compromised.
Resistor values recommended are between 100k? and
500k?.
The resistor values are calculated by:
R1 = R2 – 1
where V OUT is the desired output voltage. Calculate sepa-
rately for each output.
October 2005
9
M9999-101805
相关PDF资料 |
PDF描述 |
|---|---|
| RCB70DHNN | CONN EDGECARD 140PS DIP .050 SLD |
| MIC2211-WOYML TR | IC REG LDO 1.6V/2.9V 10-MLF |
| MIC2211-WMYML TR | IC REG LDO 1.6V/2.8V 10-MLF |
| RCB70DHND | CONN EDGECARD 140PS DIP .050 SLD |
| MIC2211-VVYML TR | IC REG LDO 1.6V/1.9V 10-MLF |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2212 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Dual uCap LDO and Power-On Reset |
| MIC2212_06 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Dual レCap LDO and Power-On Reset |
| MIC2212-1.85BML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Dual uCap LDO and Power-On Reset |
| MIC2212-1.8BML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Dual uCap LDO and Power-On Reset |
| MIC2212-2.6BML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Dual uCap LDO and Power-On Reset |
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