參數(shù)資料
型號(hào)： MCP1702
廠商： Microchip Technology Inc.
英文描述： 250 mA Low Quiescent Current LDO Regulator
中文描述： 250毫安低靜態(tài)電流LDO穩(wěn)壓器
文件頁(yè)數(shù)： 11/26頁(yè)
文件大小： 689K
代理商： MCP1702
2007 Microchip Technology Inc.
DS22008B-page 11
MCP1702
4.0
DETAILED DESCRIPTION
4.1
Output Regulation
A portion of the LDO output voltage is fed back to the
internal error amplifier and compared with the precision
internal bandgap reference. The error amplifier output
will adjust the amount of current that flows through the
P-Channel pass transistor, thus regulating the output
voltage to the desired value. Any changes in input
voltage or output current will cause the error amplifier
to respond and adjust the output voltage to the target
voltage (refer to Figure 4-1).
4.2
Overcurrent
The MCP1702 internal circuitry monitors the amount of
current flowing through the P-Channel pass transistor.
In the event of a short-circuit or excessive output
current, the MCP1702 will turn off the P-Channel
device for a short period, after which the LDO will
attempt to restart. If the excessive current remains, the
cycle will repeat itself.
4.3
Overtemperature
The internal power dissipation within the LDO is a
function of input-to-output voltage differential and load
current. If the power dissipation within the LDO is
excessive, the internal junction temperature will rise
above the typical shutdown threshold of 150°C. At that
point, the LDO will shut down and begin to cool to the
typical turn-on junction temperature of 130°C. If the
power dissipation is low enough, the device will
continue to cool and operate normally. If the power
dissipation remains high, the thermal shutdown
protection circuitry will again turn off the LDO,
protecting it from catastrophic failure.
FIGURE 4-1:
Block Diagram.
+
-
MCP1702
V
IN
V
OUT
GND
+V
IN
Error Amplifier
Voltage
Reference
Overcurrent
Overtemperature
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP1702-1202E/CB 制造商:Microchip Technology Inc 功能描述:
MCP1702-1202E/TO 功能描述:低壓差穩(wěn)壓器 - LDO Low Iq 250mA LDO Vin 13.2V max Vout=1.2V RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MCP1702-1502E/TO 功能描述:低壓差穩(wěn)壓器 - LDO Low Iq 250mA LDO Vin 13.2V max Vout=1.5V RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MCP1702-1802E/TO 功能描述:低壓差穩(wěn)壓器 - LDO LDO w/ Low Quiescent RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MCP1702-2502E/TO 功能描述:低壓差穩(wěn)壓器 - LDO LDO w/ Low Quiescent RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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