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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 22/24頁 |
| 文件大?。?/td> | 367K |
| 代理商： | LT3681EDE |
LT3681
7
3681f
PI FU CTIO S
UU
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PG (Pin 1): The PG pin is the open collector output of an
internal comparator. PG remains low until the FB pin is
within 10% of the nal regulation voltage. PG output is
valid when VIN is above 3.5V and RUN/SS is high.
BIAS (Pin 2): The BIAS pin supplies the current to the
LT3681’s internal regulator. Tie this pin to the lowest
available voltage source above 3V (typically VOUT). This
architecture increases efciency especially when the input
voltage is much higher than the output.
FB (Pin 3): The LT3681 regulates the FB pin to 1.265V.
Connect the feedback resistor divider tap to this pin.
VC (Pin 5): The VC pin is the output of the internal error
amplier. The voltage on this pin controls the peak switch
current. Tie an RC network from this pin to ground to
compensate the control loop.
RT (Pin 6): Oscillator Resistor Input. Connecting a resistor
to ground from this pin sets the switching frequency.
DA (Pin 8): This is the anode of the integrated power
Schottky diode. High frequency, large amplitude currents
ow through this pin, so tie it to ground through a low
impedance connection.
DC (Pin 9, Exposed Pad 16): These pins connect to the
cathode of the integrated power Schottky diode. High fre-
quency, large amplitude currents ow through these pins,
so tie them to SW through a low impedance connection.
BD (Pin 10): This pin connects to the anode of the internal
boost Schottky diode.
BOOST (Pin 11): This pin is used to provide a drive
voltage, higher than the input voltage, to the internal
bipolar NPN power switch. Connect a capacitor between
this pin and SW.
SW (Pin 12): The SW pin is the output of the internal
power switch. Connect this pin to the inductor, DC and
boost capacitor.
VIN (Pin 13): The VIN pin supplies current to the LT3681’s
internal regulator and to the internal power switch. This
pin must be locally bypassed.
RUN/SS (Pin 14): The RUN/SS pin is used to put the
LT3681 in shutdown mode. Tie to ground to shut down
the LT3681. Tie to 2.3V or more for normal operation. If
the shutdown feature is not used, tie this pin to the VIN
pin. RUN/SS also provides a soft-start function; see the
Applications Information section.
GND (Pins 4, 7, Exposed Pad 15): All three of these
terminals internally connect to the LT3681 control IC’s
signal return, while exposed pad 15 performs the added
function of providing a low thermal resistance heat ow
path between the IC and the system heatsink. Tie all of
these terminals to a copper pour on the top layer of the
printed circuit board. Please refer to the Applications
Information section for more details.
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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:- 標準包裝: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)計資源:Design Support Tool 標準包裝: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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