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參數(shù)資料
| 型號(hào)： | 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)： | 14/28頁 |
| 文件大?。?/td> | 509K |
| 代理商： | LT3686EDD#PBF |
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LT3686
21
3686fc
ApplicAtions inForMAtion
supply, the input network should be designed to prevent
this overshoot. Figure 15 shows the waveforms that re-
sult when an LT3686 circuit is connected to a 24V supply
through six feet of 24-gauge twisted pair. The first plot is
the response with a 2.2μF ceramic capacitor at the input.
The input voltage rings as high as 35V and the input cur-
rent peaks at 20A. One method of damping the tank circuit
is to add another capacitor with a series resistor to the
circuit. In Figure 15b an aluminum electrolytic capacitor
has been added. This capacitor’s high equivalent series
resistance damps the circuit and eliminates the voltage
overshoot. The extra capacitor improves low frequency
ripple filtering and can slightly improve the efficiency of
the circuit, though it is likely to be the largest component
in the circuit. An alternative solution is shown in Figure
15c. A 1Ω resistor is added in series with the input to
eliminate the voltage overshoot (it also reduces the peak
input current). A 0.1μF capacitor improves high frequency
filtering. This solution is smaller and less expensive than
theelectrolyticcapacitor.Forhighinputvoltagesitsimpact
on efficiency is minor, reducing efficiency less than one
half percent for a 5V output at full load operating from 24V.
Figure 15. A Well Chosen Input Network Prevents Input Voltage Overshoot and Ensures Reliable Operation
When the LT3686 Is Connected to a Live Supply
+
LT3686
2.2F
VIN
20V/DIV
IIN
5A/DIV
20s/DIV
VIN
CLOSING SWITCH
SIMULATES HOT PLUG
IIN
(15a)
(15b)
(15c)
LOW
IMPEDANCE
ENERGIZED
24V SUPPLY
STRAY
INDUCTANCE
DUE TO 6 FEET
(2 METERS) OF
TWISTED PAIR
+
LT3686
2.2F
10F
35V
AI.EI.
LT3686
2.2F
0.1F
1
3686 F15
VIN
20V/DIV
IIN
5A/DIV
20s/DIV
VIN
20V/DIV
IIN
5A/DIV
20s/DIV
DANGER!
RINGING VIN MAY EXCEED
ABSOLUTE MAXIMUM
RATING OF THE LT3686
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 |
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