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| 型号： | MCP1754ST-1802E/CB |
| 厂商： | Microchip Technology |
| 文件页数： | 17/42页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V .15A SOT-23A-3 |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 输入电压： | 3.6 V ~ 16 V |
| 电压 - 压降（标准）： | 0.3V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23A-3 |
| 包装： | 标准包装 |
| 其它名称： | MCP1754ST-1802E/CBDKR |
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MCP1754/MCP1754S
4.0
DEVICE OVERVIEW
MCP1754S will supply higher load currents of up to
typically 250 mA. This allows for device usage in
The MCP1754/MCP1754S is a 150 mA output current,
Low Dropout (LDO) voltage regulator. The low dropout
voltage of 300 mV typical at 150 mA of current makes
it ideal for battery-powered applications. The input
voltage range is 3.6V to 16.0V. Unlike other high output
current LDOs, the MCP1754/MCP1754S typically
draws only 150 μA of quiescent current for a 150 mA
load. The MCP1754 adds a shutdown control input pin
and a power good output pin. The output voltage
applications that have pulsed load currents having an
average output current value of 150 mA or less.
Output overload conditions may also result in an over-
temperature shutdown of the device. If the junction
temperature rises above 150°C (typical), the LDO will
“Overtemperature Protection” for more information
on overtemperature shutdown.
options are fixed.
4.3
Output Capacitor
4.1
LDO Output Voltage
The MCP1754/MCP1754S requires a minimum output
The MCP1754/MCP1754S LDO has a fixed output
voltage. The output voltage range is 1.8V to 5.5V.
capacitance of 1 μF for output voltage stability. Ceramic
capacitors are recommended because of their size,
cost and environmentally robust qualities.
4.2
Output Current and Current
Limiting
Aluminum-electrolytic and tantalum capacitors can be
used on the LDO output as well. The Equivalent Series
Resistance (ESR) of the electrolytic output capacitor
The MCP1754/MCP1754S LDO is tested and ensured
to supply a minimum of 150 mA of output current. The
MCP1754/MCP1754S has no minimum output load, so
the output load current can go to 0 mA and the LDO will
continue to regulate the output voltage to within
tolerance.
The MCP1754/MCP1754S also incorporates a true
output current foldback. If the output load presents an
excessive load due to a low impedance short circuit
condition, the output current and voltage will fold back
towards 30 mA and 0V respectively.
The output voltage and current will resume normal
levels when the excessive load is removed. If the
should be no greater than 2.0 Ω . The output capacitor
should be located as close to the LDO output as is
practical. Ceramic materials X7R and X5R have low
temperature coefficients and are well within the
acceptable ESR range required. A typical 1 μF X7R
0805 capacitor has an ESR of 50 milliohms.
Larger LDO output capacitors can be used with the
MCP1754/MCP1754S to improve dynamic
performance and power supply ripple rejection
performance. A maximum of 1000 μF is
recommended. Aluminum-electrolytic capacitors are
not recommended for low temperature applications of
< -25°C.
overload condition is a soft overload, the MCP1754/
Typical Current FoldBack - 5V Output
6
5
4
3
2
1
0
Increasing Load
Decreasing Load
0.000
0.050
0.100
0.150
0.200
0.250
I OUT (A)
FIGURE 4-1:
Typical Current Foldback.
? 2011 Microchip Technology Inc.
DS22276A-page 17
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| MCP1754ST-3302E/CB | 功能描述:低压差稳压器 - LDO LDO 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 |
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| MCP1754ST-5002E/CB | 功能描述:低压差稳压器 - LDO LDO 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 |
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