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| 型号： | MIC5156-3.3YM |
| 厂商： | Micrel Inc |
| 文件页数： | 9/13页 |
| 文件大小： | 271K |
| 描述： | IC REG CTRLR SGL 3.3V 8-SOIC |
| 标准包装： | 95 |
| 类型： | 正，固定式 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 电流 - 电源： | 2.7mA |
| 输入电压： | 3 V ~ 36 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1096 (CN2011-ZH PDF) |
| 其它名称： | 576-2355 MIC5156-3.3YM-ND |
August 2005
9
MIC5156/5157/5158
MIC5156/5157/5158
Micrel, Inc.
Adjustable Congurations
Micrels MIC5156 [adjustable] and MIC5158 require an ex-
ternal resistive divider to set the output voltage from 1.235V
to 36V. For best results, use a 10k?resistor for R2. See
equation (1) and gure (2).
1)
1
= 1 ?10
4
( - 1)
V
OUT
1.235
GND
S
EA*
MIC5157/8
R1
R2
10k
V
OUT
G
Figure 2. Typical Resistive Divider
Input Filter Capacitor
The Super LDO requires an input bypass capacitor for accom-
modating wide changes in load current and for decoupling
the error amplier and charge pump. A medium to large value
low-ESR (equivalent series resistance) capacitor is best,
mounted close to the device.
Output Filter Capacitor
An output lter capacitor may be used to reduce ripple and
improve load regulation. Stable operation does not require
a large capacitor, but for transient load regulation the size of
the output capacitor may become a consideration. Common
aluminum electrolytic capacitors perform nicely; very low-ESR
capacitors are not necessary. Increased capacitance (rather
than reduced ESR) is preferred. The capacitor value should
be large enough to provide sufcient I = C ?dV/dt current
consistent with the required transient load regulation quality.
For a given step increase in load current, the output voltage will
drop by about dV = I ?dt/C, where I represents the increase
in load current over time t. This relationship assumes that
all output current was being supplied via the MOSFET pass
device prior to the load increase. Small (0.01礔 to 10礔) lm
capacitors parallel to the load will further improve response
to transient loads.
Some linear regulators specify a minimum required output lter
capacitance because the capacitor determines the dominant
pole of the system, and thereby stabilizes the system. This
is not the situation for the MIC5156/7/8; its dominant pole is
determined within its error amplier.
GND
S
EA
MIC5157
or
MIC5158
G
V
IN
Figure 1b. Connections for Adjustable Output
GND
MIC5156
G
V
IN
EA
* Optional 16V zener diode
recommended in applications
whereV
G
is greater than 18V
*
Figure 1c. MIC5156 Connections for
Adjustable Output
MOSFET Gate-to-Source Protection
When using the adjustable version of the MIC5156, an external
16V zener diode placed from gate-to-source is recommended
for MOSFET protection. All other versions of the Super LDO
regulator controller use the internal gate-to-source clamp.
Output Voltage Conguration
Fixed Congurations
The MIC5156-3.3 and MIC5156-5.0 are preset for 3.3V and
5.0V respectively.
The MIC5157 operates at 3.3V when the 3.3V pin is connected
to the S (source) pin; 5.0V when the 5.0V pin is connected to
the S pin; or 12V if the 3.3V and 5.0V pins are open.
The MIC5158 operates at a xed 5V (without an external
resistive divider) if the 5V FB pin is connected to EA.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5156-5.0BM | 功能描述:IC REG CTRLR SGL 5V 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性晶体管驱动器 系列:- 产品培训模块:More Information on LDOs 标准包装:2,500 系列:- 类型:正，固定式 输出数:2 输出电压:2.8V，3.3V 电流 - 电源:12mA 输入电压:5 V ~ 22 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| MIC5156-5.0BM TR | 功能描述:IC REG CTRLR SGL 5V 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性晶体管驱动器 系列:- 产品培训模块:More Information on LDOs 标准包装:2,500 系列:- 类型:正，固定式 输出数:2 输出电压:2.8V，3.3V 电流 - 电源:12mA 输入电压:5 V ~ 22 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| MIC5156-5.0BN | 功能描述:IC REG CTRLR SGL 5V 8-DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性晶体管驱动器 系列:- 产品培训模块:More Information on LDOs 标准包装:2,500 系列:- 类型:正，固定式 输出数:2 输出电压:2.8V，3.3V 电流 - 电源:12mA 输入电压:5 V ~ 22 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| MIC5156-5.0YM | 功能描述:低压差控制器 - LDO Super LDO Regulator-Adjustable(Lead Free) RoHS:否 制造商:Micrel 最大输入电压:5.5 V 输出电压:Adjustable 输出电流:10 mA 负载调节: 输出类型:Adjustable, Fixed 输出端数量:1 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-6 |
| MIC5156-5.0YM TR | 功能描述:低压差控制器 - LDO Super LDO Regulator-Adjustable(Lead Free) RoHS:否 制造商:Micrel 最大输入电压:5.5 V 输出电压:Adjustable 输出电流:10 mA 负载调节: 输出类型:Adjustable, Fixed 输出端数量:1 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-6 |
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