參數(shù)資料
型號： MCP1725
廠商： Microchip Technology Inc.
英文描述： 500 mA, Low Voltage, Low Quiescent Current LDO Regulator
中文描述： 500毫安，低電壓，低靜態(tài)電流LDO穩(wěn)壓器
文件頁數(shù)： 19/32頁
文件大?。?/td> 1000K
代理商： MCP1725
2006 Microchip Technology Inc.
DS22026A-page 19
MCP1725
4.8
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
+ 0.6V differential applied. The MCP1725 LDO has
a very low dropout voltage specification of 210 mV
(typical) at 0.5A of output current. See
Section 1.0
“Electrical Characteristics”
for maximum dropout
voltage specifications.
The MCP1725 LDO operates across an 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 2.18V (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
2.04V (typical).
Since the MCP1725 LDO undervoltage lockout
activates at 2.04V as the input voltage is falling, the
dropout voltage specification does not apply for output
voltages that are less than 1.9V.
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.
4.9
Overtemperature Protection
The MCP1725 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 dissipation, ambient temperature and
package
thermal
resistance.
“Application Circuits/Issues”
for more information
on LDO power dissipation and junction temperature.
See
Section 5.0
相關PDF資料
PDF描述
MCP1726 1A, Low Voltage, Low Quiescent Current LDO Regulator
MCP1727 1.5A, Low Voltage, Low Quiescent Current LDO Regulator
MCP1801 150 mA, High PSRR, Low Quiescent Current LDO
MCP1802 300 mA, High PSRR, Low Quiescent Current LDO
MCP1827T-1202EAB 1.5A, Low Voltage, Low Quiescent Current LDO Regulator
相關代理商/技術參數(shù)
參數(shù)描述
MCP1725-0802E/MC 功能描述:低壓差穩(wěn)壓器 - LDO 500mA CMOS LDO Vout=0.8V 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
MCP1725-0802E/SN 功能描述:低壓差穩(wěn)壓器 - LDO 500mA CMOS LDO Vout=0.8V 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
MCP1725-1202E/MC 功能描述:低壓差穩(wěn)壓器 - LDO 500mA CMOS LDO 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
MCP1725-1202E/SN 功能描述:低壓差穩(wěn)壓器 - LDO 500mA CMOS LDO 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
MCP1725-1802E/MC 功能描述:低壓差穩(wěn)壓器 - LDO 500mA CMOS LDO Vout=1.8V 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
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