- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄30767 > LT3684IMSE (LINEAR TECHNOLOGY CORP) 4 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數(shù)資料
| 型號： | LT3684IMSE |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大小： | 326K |
| 代理商： | LT3684IMSE |
LT3684
15
3684f
proper start-up, the minimum input voltage is also limited
by the boost circuit. If the input voltage is ramped slowly,
or the LT3684 is turned on with its RUN/SS pin when the
output is already in regulation, then the boost capacitor
may not be fully charged. Because the boost capacitor is
charged with the energy stored in the inductor, the circuit
will rely on some minimum load current to get the boost
circuit running properly. This minimum load will depend
on input and output voltages, and on the arrangement of
the boost circuit. The minimum load generally goes to
zero once the circuit has started. Figure 5 shows a plot
of minimum load to start and to run as a function of input
voltage. In many cases the discharged output capacitor
will present a load to the switcher and the minimum input
to start will be the same as the minimum input to run.
This occurs, for example, if RUN/SS is asserted after VIN
is applied. The plots show the worst-case situation where
VIN is ramping very slowly. For lower start-up voltage, the
boost diode can be tied to VIN; however, this restricts the
input range to one-half of the absolute maximum rating
of the BOOST pin.
At light loads, the inductor current becomes discontinu-
ous and the effective duty cycle can be very high. This
reduces the minimum input voltage to approximately
300mV above VOUT. At higher load currents, the inductor
current is continuous and the duty cycle is limited by the
maximum duty cycle of the LT3684, requiring a higher
input voltage to maintain regulation.
Figure 4. Three Circuits For Generating The Boost Voltage
Figure 5. The Minimum Input Voltage Depends on
Output Voltage, Load Current and Boost Circuit
APPLICATIONS INFORMATION
VIN
BOOST
SW
BD
VIN
VOUT
4.7
F
C3
GND
LT3684
VIN
BOOST
SW
BD
VIN
VOUT
4.7
F
C3
D2
GND
LT3684
VIN
BOOST
SW
BD
VIN
VOUT
4.7
F
C3
GND
LT3684
3684 FO4
(4a) For VOUT > 2.8V
(4b) For 2.5V < VOUT < 2.8V
(4c) For VOUT < 2.5V
3684 F05
LOAD CURRENT (A)
0.001
INPUT
VOL
TAGE
(V)
4.0
4.5
5.0
10
3.5
3.0
2.0
0.01
0.1
1
2.5
6.0
5.5
TO START
TO RUN
VOUT = 3.3V
TA = 25°C
L = 4.7
H
f = 800kHz
LOAD CURRENT (A)
0.001
INPUT
VOL
TAGE
(V)
5.0
6.0
7.0
10
4.0
2.0
0.01
0.1
1
3.0
8.0
TO START
TO RUN
VOUT = 5V
TA = 25°C
L = 4.7
H
f = 800kHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT3684EDD#TR | 4 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3694-1EUFD#PBF | 2.6 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PQCC28 |
| LT3694-1EUFD#TRPBF | 2.6 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PQCC28 |
| LT3694IUFD#TRPBF | 2.6 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PQCC28 |
| LT3694IFE#PBF | 2.6 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3684IMSE#PBF | 功能描述:IC REG BUCK ADJ 2A 10MSOP 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)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT3684IMSE#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.8MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.8MHZ, MSOP-10 |
| LT3684IMSE#TRPBF | 功能描述:IC REG BUCK ADJ 2A 10MSOP 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(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 |
| LT3685 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:36V, 2.6A Monolithic Buck |
| LT3685EDD#PBF | 功能描述:IC REG BUCK ADJ 2A 10DFN 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)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。