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参数资料
| 型号： | MIC5156-5.0BM |
| 厂商： | MICREL INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | Super LDO⑩ Regulator Controller |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封装： | SOIC-8 |
| 文件页数： | 11/13页 |
| 文件大小： | 271K |
| 代理商： | MIC5156-5.0BM |
August 2005
7
MIC5156/5157/5158
MIC5156/5157/5158
Micrel, Inc.
Functional Description
A Super LDO Regulator is a complete regulator built around
Micrel’s Super LDO Regulator Controller.
Refer to Block Diagrams MIC5156, MIC5157, and
MIC5158.
Version Differences
The MIC5156 requires an external voltage for MOSFET gate
drive and is available in 3.3V xed output, 5V xed output, or
adjustable output versions. With 8-pins, the MIC5156 is the
smallest of the Super LDO Regulator Controllers.
The MIC5157 and MIC5158 each have an internal charge
pump which provides MOSFET gate drive voltage. The
MIC5157 has a selectable xed output of 3.3V, 5V, or 12V.
The MIC5158 may be congured for a xed 5V or adjustable
output.
Enable (EN)
With at least 3.0V on VDD, applying a TTL low to EN places
the controller in shutdown mode. A TTL high on EN enables
the internal bias circuit which powers all internal circuitry. EN
must be pulled high if unused. The voltage applied to EN may
be as high as 36V.
The controller draws less than 1A in shutdown mode.
Gate Enhancement
The Super LDO Regulator Controller manages the gate-
1.235V
Bandgap
Reference
VCP
Clamp
Internal
Bias
Error
Amp
75mV
35mV
EA
S (Source)
ILIMIT
Comparator
D (Drain)
[ ILIMIT]
G (Gate)
VCP
VDD
VOUT
Comparator
to all
internal blocks
GND
Regulated
+3.6V Output
+5V Input
Q1
IRFZ44
RS
3m
1F
16.6V
32k
10k
5V
FB
Oscillator
Charge Pump
Tripler
C1+ C1– C2+ C2–
0.1F
C1
C2
C3
FLAG
19.1k
10.0k
EN
Enable
Shutdown
CL
Block Diagram MIC5158
Block Diagram with External Components
Adjustable Power Supply, 3.6V Conguration
to-source enhancement voltage for an external N-channel
MOSFET(regulatorpasselement)placedbetweenthesupply
and the load. The gate-to-source voltage may vary from 1V
to 16V depending upon the supply and load conditions.
Because the source voltage (output) approaches the drain
voltage (input) when the regulator is in dropout and the
MOSFET is fully enhanced, an additional higher supply
voltage is required to produce the necessary gate-to-source
enhancement. This higher gate drive voltage is provided by
an external gate drive supply (MIC5156) or by an internal
charge pump (MIC5157 and MIC5158).
Gate Drive Supply Voltage (MIC5156 only)
The gate drive supply voltage must not be more than 14V
above the supply voltage (VP – VDD < 14V). The minimum
necessary gate drive supply voltage is:
VP = VOUT + VGS + 1
where:
VP = gate drive supply voltage
VOUT = regulator output voltage
VGS = gate-to-source voltage for full
MOSFET gate enhancement
The error amplier uses the gate drive supply voltage to drive
the gate of the external MOSFET. The error amplier output
can swing to within 1V of VP.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5156BM | 功能描述:IC REG CTRLR SGL POS ADJ 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) |
| MIC5156BM TR | 功能描述:IC REG CTRLR SGL POS ADJ 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) |
| MIC5156BN | 功能描述:IC REG CTRLR SGL POS ADJ 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-MIC5157-MIC5158稳压控制器 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| MIC5156YM | 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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