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| 型号： | MCP1826ST-0802E/DB |
| 厂商： | Microchip Technology |
| 文件页数： | 18/36页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 0.8V 1A SOT223-3 |
| 产品培训模块： | High Current LDOs |
| 标准包装： | 4,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 0.8V |
| 输入电压： | 2.3 V ~ 6 V |
| 电压 - 压降（标准）： | 0.25V @ 1A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1A（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223-3 |
| 包装： | 带卷 (TR) |
| 其它名称： | MCP1826ST-0802E/DBTR |
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MCP1826/MCP1826S
the 30 μs delay, the LDO output enters its soft-start
period as it rises from 0V to its final regulation value. If
the SHDN input signal is pulled low during the 30 μs
delay period, the timer will be reset and the delay time
will start over again on the next rising edge of the
SHDN input. The total time from the SHDN input going
high (turn-on) to the LDO output being in regulation is
typically 100 μs. See Figure 4-4 for a timing diagram of
the SHDN input.
4.7 Dropout Voltage and Undervoltage
Lockout
Dropout voltage is defined as the input-to-output
voltage differential at which the output voltage drops
2% below the nominal value that was measured with a
V R + 0.5V differential applied. The MCP1826/
MCP1826S LDO has a very low dropout voltage
specification of 300 mV (typical) at 1000 mA of output
T OR
400 ns (typ)
for maximum dropout voltage specifications.
The MCP1826/MCP1826S LDO operates across an
30 μs
SHDN
V OUT
FIGURE 4-4:
Diagram.
70 μs
Shutdown Input Timing
input voltage range of 2.3V to 6.0V and incorporates
input Undervoltage Lockout (UVLO) circuitry that keeps
the LDO output voltage off until the input voltage
reaches a minimum of 2.00V (typical) on the rising
edge of the input voltage. As the input voltage falls, the
LDO output will remain on until the input voltage level
reaches 1.82V (typical).
Since the MCP1826/MCP1826S LDO undervoltage
lockout activates at 1.82V as the input voltage is falling,
the dropout voltage specification does not apply for
output voltages that are less than 1.8V.
For high-current applications, voltage drops across the
PCB traces must be taken into account. The trace
resistances can cause significant voltage drops
between the input voltage source and the LDO. For
applications with input voltages near 2.3V, these PCB
trace voltage drops can sometimes lower the input
voltage enough to trigger a shutdown due to
undervoltage lockout.
4.8
Overtemperature Protection
The MCP1826/MCP1826S LDO has temperature-
sensing circuitry to prevent the junction temperature
from exceeding approximately 150 ° C. If the LDO
junction temperature does reach 150 ° C, the LDO
output will be turned off until the junction temperature
cools to approximately 140 ° C, at which point the LDO
output will automatically resume normal operation. If
the internal power dissipation continues to be
excessive, the device will again shut off. The junction
temperature of the die is a function of power dissipa-
tion, ambient temperature and package thermal
Issues” for more information on LDO power
dissipation and junction temperature.
DS22057A-page 18
? 2007 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
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| MCP1826ST-1202E/DB | 功能描述:低压差稳压器 - LDO 1A 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 |
| MCP1826ST-1202E/EB | 功能描述:低压差稳压器 - LDO 1A 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 |
| MCP1826ST-1802E/DB | 功能描述:低压差稳压器 - LDO 1A 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 |
| MCP1826ST-1802E/EB | 功能描述:低压差稳压器 - LDO 1A 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 |
| MCP1826ST-2502E/DB | 功能描述:低压差稳压器 - LDO 1A CMOS LDO Vout 2.5V 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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