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| 型号： | MCP1824T-0802E/OT |
| 厂商： | Microchip Technology |
| 文件页数： | 18/34页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 0.8V .3A SOT23-5 |
| 产品培训模块： | High Current LDOs |
| 标准包装： | 3,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 0.8V |
| 输入电压： | 2.1 V ~ 6 V |
| 电压 - 压降（标准）： | 0.2V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
| 其它名称： | MCP1824T-0802E/OTTR |
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MCP1824/MCP1824S
4.0 DEVICE OVERVIEW
The MCP1824/MCP1824S is a 300 mA output current,
Low Dropout (LDO) voltage regulator. The low dropout
The allowable resistance value range for resistor R 2 is
from 10 k Ω to 200 k Ω . Solving Equation 4-1 for R 1
voltage of 200 mV typical at 300 mA of current makes
it ideal for battery-powered applications. The input
voltage range is 2.1V to 6.0V. Unlike other high output
EQUATION 4-2:
CALCULATING ADJ PIN
RESISTOR VALUES
R 1 = R 2 ------------- – 1
current LDOs, the MCP1824/MCP1824S only draws a
maximum of 220 μA of quiescent current. The
MCP1824 adds a shutdown control input pin and a
Where:
V OUT
V ADJ
power good output pin. The two output voltage options
are fixed or adjustable. The adjustable option is
available on the MCP1824 devices. The adjustable out-
put voltage is set using two external resistors.
V OUT
V ADJ
=
=
LDO Output Voltage
ADJ Pin Voltage
(typically 0.41V)
4.1
LDO Output Voltage
4.2
Output Current and Current
The MCP1824 LDO is available with either a fixed
output voltage or an adjustable output voltage. The
output voltage range is 0.8V to 5.0V for either version.
The MCP1824S LDO is available as a fixed voltage
device.
Limiting
The MCP1824/MCP1824S LDO is tested and ensured
to supply a minimum of 300 mA of output current. The
MCP1824/MCP1824S has no minimum output load, so
the output load current can go to 0 mA and the LDO will
4.1.1
ADJUST INPUT
continue to regulate the output voltage to within
The adjustable version of the MCP1824 uses the ADJ
pin to get the output voltage feedback for output voltage
regulation. This allows the user to set the output volt-
age of the device with two external resistors. The nom-
inal voltage for ADJ is 0.41V.
MCP1824. Resistors R 1 and R 2 form the resistor
divider network necessary to set the output voltage.
With this configuration, Equation 4-1 represents the
equation for setting V OUT .
tolerance.
The MCP1824/MCP1824S also incorporates an output
current limit. If the output voltage falls below 0.7V due
to an overload condition (usually represents a shorted
load condition), the output current is limited to 720 mA
(typical). If the overload condition is a soft overload, the
MCP1824/MCP1824S will supply higher load currents
of up to 900 mA. The MCP1824/MCP1824S should not
be operated in this condition continuously as it may
result in failure of the device. However, this does allow
for device usage in applications that have higher
EQUATION 4-1:
CALCULATING V OUT
pulsed load currents having an average output current
value of 300 mA or less.
V OUT = V ADJ ------------------
Where:
R 1 + R 2
R 2
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
V OUT
V ADJ
=
=
LDO Output Voltage
ADJ Pin Voltage
(typically 0.41V)
temperature Protection” for more information on
overtemperature shutdown.
MCP1824-ADJ
V OUT
O ff
On
SHDN
1 2 3 4 5
ADJ
R 1
C2
1 μF
V IN
C 1
4.7 μF
GND
R 2
FIGURE 4-1:
Typical Adjustable Output
Voltage Application Circuit.
DS22070A-page 18
2007 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP1824T-1202E/DC | 功能描述:低压差稳压器 - LDO 300 mA CMOS LDO Vout 1.2V ETR 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 |
| MCP1824T-1202E/DC | 制造商:Microchip Technology Inc 功能描述:; Input Voltage Primary Max:6V; Output V |
| MCP1824T-1202E/OT | 功能描述:低压差稳压器 - LDO 300 mA CMOS LDO Vout 1.2V ETR 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 |
| MCP1824T-1202E/OT | 制造商:Microchip Technology Inc 功能描述:; Input Voltage Primary Max:6V; Output V |
| MCP1824T-1802E/DC | 功能描述:低压差稳压器 - LDO 300 mA CMOS LDO Vout 1.8V ETR 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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