- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44986 > LT3686EDD#PBF (LINEAR TECHNOLOGY CORP) 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數(shù)資料
| 型號： | LT3686EDD#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 9/28頁 |
| 文件大?。?/td> | 509K |
| 代理商： | LT3686EDD#PBF |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當(dāng)前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
LT3686
17
3686fc
the LT3686 is turned on with its EN/UVLO 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 the 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 9 shows plots of minimum load to start
and to run as a function of input voltage. In many cases
ApplicAtions inForMAtion
the discharged output capacitor will present a load to the
switcher which will allow it to start. At light loads, the
inductor current becomes discontinuous and the effective
duty cycle can be very high. This reduces the minimum
input voltage to approximately 400mV above VOUT. At
higher load currents, the inductor current is continuous
and the duty cycle is limited by the maximum duty cycle,
requiring a higher input voltage to maintain regulation.
As the LT3686 enters dropout, the boost capacitor voltage
willbelimitedbyVOUT,whichisfixedbythemaximumduty
cycle. If the boost capacitor’s voltage during dropout falls
Figure 9a. Typical Minimum Input Voltage, VOUT = 3.3V,
f = 1MHz, L = 15H, Mode < 0.4V
ILOAD (mA)
1
0
V IN
(V)
1
2
4
5
6
3
7
10
100
1000
3686 F09a
START
RUN
SUSTAIN
ILOAD (mA)
1
0
V IN
(V)
1
2
4
5
6
7
8
3
9
10
100
1000
3686 F09b
START
RUN
SUSTAIN
ILOAD (mA)
1
0
V IN
(V)
1
2
4
5
6
7
3
10
100
1000
3686 F09c
RUN
ILOAD (mA)
1
0
V IN
(V)
1
2
4
5
7
6
8
3
10
100
1000
3686 F09d
RUN
Figure 9b. Typical Minimum Input Voltage, VOUT = 5V,
f = 1MHz, L = 22H, Mode < 0.4V
Figure 9c. Typical Minimum Input Voltage, VOUT = 3.3V,
f = 1MHz, L = 15H, Mode > 0.8V
Figure 9d. Typical Minimum Input Voltage, VOUT = 5V,
f = 1MHz, L = 22H, Mode > 0.8V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT3686IDD#TRPBF | 2.65 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| LT3688IFE#TRPBF | SWITCHING REGULATOR, PDSO24 |
| LT3688EUF#PBF | SWITCHING REGULATOR, PQCC24 |
| LT3688IFE#PBF | SWITCHING REGULATOR, PDSO24 |
| LT3688HFE#PBF | SWITCHING REGULATOR, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3686EDDTRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:37V/1.2A Step-Down Regulator in 3mm × 3mm DFN |
| LT3686HDD#PBF | 功能描述:IC REG BUCK ADJ 1.2A 10-DFN 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 |
| LT3686HDD#PBF | 制造商:Linear Technology 功能描述:IC PWM STEP-DOWN DC/DC CONVERTER DFN10 制造商:Linear Technology 功能描述:IC, PWM STEP-DOWN DC/DC CONVERTER, DFN10 |
| LT3686HDD#TRPBF | 功能描述:IC REG BUCK ADJ 1.2A 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:2,500 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，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LT3686IDD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:37V/1.2A Step-Down Regulator in 3mm × 3mm DFN |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。