參數(shù)資料
型號(hào)： LP2981-28YZUR
廠商： Texas Instruments, Inc.
英文描述： 100-MA ULTRA DROPOUT REGULATOR WITH SHUTDOWN
中文描述： 100馬超差穩(wěn)壓器具有關(guān)斷
文件頁(yè)數(shù)： 14/20頁(yè)
文件大小： 346K
代理商： LP2981-28YZUR
SLVS521B JULY 2004 REVISED OCTOBER 2004
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
reverse input-output voltage
An inherent diode is present across the PNP pass element of the LP2981.
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 one V
BE
higher than the input, or if the input
is abruptly stepped below the output, this diode is forward biased and can cause a parasitic silicon-controlled
rectifier (SCR) to latch, resulting in current flowing from the output to the input (values in excess of 100 mA can
cause damage). Thus, to prevent possible damage to the regulator in any application where the output may be
pulled above the input, an external Schottky diode must 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
LP2981
pin 4: NC
Pin 4 must be left OPEN. Do not connect anything to this pin, as it is used for post package trim.
相關(guān)PDF資料
PDF描述
LP2981-29YZUR Circular Connector; MIL SPEC:MIL-C-26482, Series I, Crimp; Body Material:Aluminum; Series:PT00; No. of Contacts:4; Connector Shell Size:8; Connecting Termination:Crimp; Circular Shell Style:Wall Mount Receptacle; Body Style:Straight
LP2981-30YZUR Circular Connector; MIL SPEC:MIL-C-26482, Series I, Crimp; Body Material:Aluminum; Series:PT00; No. of Contacts:4; Connector Shell Size:8; Connecting Termination:Crimp; Circular Shell Style:Wall Mount Receptacle; Body Style:Straight
LP2981-32YZUR 100-MA ULTRA DROPOUT REGULATOR WITH SHUTDOWN
LP2981A-18YEQR Computers; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No
LP2981A-18YEUR V.35 FEMALE - RS232 MALE ADAPT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP2981-29DBVR 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output 100mA Fixed(2.9V) Shutdown 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
LP2981-29DBVRG4 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output 100mA Fixed(2.9V) Shutdown 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
LP2981-29DBVT 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output 100mA Fixed(2.9V) Shutdown 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
LP2981-29DBVTG4 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output 100mA Fixed(2.9V) Shutdown 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
LP2981-3.3BUP6 WAF 制造商:Texas Instruments 功能描述:
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