參數(shù)資料
型號(hào)： LT3681EDE
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 4.4 A SWITCHING REGULATOR, 3100 kHz SWITCHING FREQ-MAX, PDSO14
封裝： 4 X 3 MM, PLASTIC, DFN-14
文件頁(yè)數(shù)： 8/24頁(yè)
文件大?。?/td> 367K
代理商： LT3681EDE
LT3681
16
3681f
Caution should be used when synchronizing more than
50% above the initial switching frequency (as set by the
RT resistor) because at higher clock frequencies the
amplitude of the internal slope compensation used to
prevent subharmonic switching is reduced. This type of
subharmonic switching only occurs at input voltages less
than twice output voltage. Higher inductor values will tend
to reduce this problem.
Reversed Input Protection
In some systems, the output may be held high when the
input to the LT3681 is absent. This may occur in battery
charging applications or in battery backup systems where
Figure 8. Diode D4 Prevents a Shorted Input from Discharging a Backup Battery Tied
to the Output. It Also Protects the Circuit from a Reversed Input. The LT3681 Runs Only
When the Input is Present
VIN
BOOST
DA
BD
FB
RUN/SS
VC
SW
DC
D4
MBRS140
VIN
LT3681
3681 F08
VOUT
BACKUP
GND
APPLICATIONS INFORMATION
a battery or some other supply is diode ORed with the
LT3681’s output. If the VIN pin is allowed to oat and the
RUN/SS pin is held high (either by a logic signal or because
it is tied to VIN), then the LT3681’s internal circuitry will
pull its quiescent current through its SW pin. This is ne
if your system can tolerate a few mA in this state. If you
ground the RUN/SS pin, the SW pin current will drop to
essentially zero. However, if the VIN pin is grounded while
the output is held high, then parasitic diodes inside the
LT3681 can pull large currents from the output through
the SW pin and the VIN pin. Figure 8 shows a circuit that
will run only when the input voltage is present and that
protects against a shorted or reversed input.
相關(guān)PDF資料
PDF描述
LT3686AEMSE#PBF 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO12
LT3686AHMSE#TRPBF 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO12
LT3686AHMSE#PBF 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO12
LT3686AIMSE#TRPBF 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO12
LT3686AIDD#PBF 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT3681EDE#PBF 功能描述:IC REG BUCK ADJ 2A 14DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
LT3681EDE#PBF 制造商:Linear Technology 功能描述:IC STEP-DOWN REGULATOR DFN-14
LT3681EDE#TRPBF 功能描述:IC REG BUCK ADJ 2A 14DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
LT3681EDEPBF 制造商:Linear Technology 功能描述:36V 2.8MHz Step-Down Regulator LT3681
LT3682 制造商:LINER 制造商全稱:Linear Technology 功能描述:42V, 750mA Step-Down Regulator with 2.5μA
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