參數(shù)資料
型號(hào)： LP2985A-31DBVT
廠商： Texas Instruments, Inc.
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
中文描述： 無(wú)電容，NMOS管，150mA的低壓差穩(wěn)壓器的反向電流保護(hù)
文件頁(yè)數(shù)： 12/23頁(yè)
文件大?。?/td> 528K
代理商： LP2985A-31DBVT
SLVS522C JULY 2004 REVISED OCTOBER 2004
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
reverse input-output voltage
There is an inherent diode present across the PNP pass element of the LP2985.
VOUT
VIN
With the anode connected to the output, this diode is reverse biased during normal operation, since the input
voltage is higher than the output. However, if the output is pulled higher than the input for any reason, this diode
is forward biased and can cause a parasitic silicon-controlled rectifier (SCR) to latch, resulting in high current
flowing from the output to the input. Thus, to prevent possible damage to the regulator in any application where
the output may be pulled above the input, an external Schottky diode should be connected between the output
and input. With the anode on output, this Schottky limits the reverse voltage across the output and input pins
to
0.3 V, preventing the regulator’s internal diode from forward biasing.
VOUT
VIN
Schottky
LP2985
相關(guān)PDF資料
PDF描述
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LP2985A-33DBVRE4 功能描述:低壓差穩(wěn)壓器 - LDO 150-mA 1% Tolerance Low-Noise LDO 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
LP2985A-33DBVRG4 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output 150mA Fixed(3.3V) Lo Quies 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
LP2985A-33DBVT 功能描述:低壓差穩(wěn)壓器 - LDO 150-mA 1% Tolerance Low-Noise LDO 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
LP2985A-33DBVTE4 功能描述:低壓差穩(wěn)壓器 - LDO 150-mA 1% Tolerance Low-Noise LDO 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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