參數(shù)資料
型號： LTC3614EUDD#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 10.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC24
封裝： 3 X 5 MM, LEAD FREE, PLASTIC, QFN-24
文件頁數(shù)： 18/30頁
文件大?。?/td> 438K
代理商： LTC3614EUDD#PBF
LTC3614
25
3614fa
Assuming worst-case conditions of VIN=2VOUT,CINshould
be selected for a maximum current rating of:
IRMS = 4A
1.8V
3.6V
3.6V
1.8V
–1
= 2ARMS
Decoupling PVIN with four 10μF to 22μF capacitors is
adequate for most applications.
If we set R2 = 196k, the value of R1 can now be determined
by solving the following equation.
R1 = 196k
1.8V
0.6V
1
A value of 392k will be selected for R1.
Finally, dene the soft start-up time choosing the proper
value for the capacitor and the resistor connected to
TRACK/SS. If we set minimum tSS = 5ms and a resistor
of 2MΩ, the following equation can be solved with the
maximum SVIN = 5.5V :
CSS =
5ms
2MΩ In
5.5V
5.5V – 0.6V
= 21.6nF
The standard value of 22nF guarantees the minimum
soft-start up time of 5ms.
Figure 1 shows the schematic for this design example.
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the LTC3614:
1. A ground plane is recommended. If a ground plane layer
is not used, the signal and power grounds should be
segregated with all small-signal components returning
to the SGND pin at one point which is then connected
to the PGND pin close to the LTC3614.
2. Connect the (+) terminal of the input capacitor(s), CIN,
as close as possible to the PVIN pin, and the (–) terminal
as close as possible to the exposed pad, PGND. This
capacitor provides the AC current into the internal power
MOSFETs.
3. Keep the switching node, SW, away from all sensitive
small-signal nodes.
4. Flood all unused areas on all layers with copper. Flood-
ing with copper will reduce the temperature rise of
power components. Connect the copper areas to PGND
(exposed pad) for best performance.
5. Connect the VFB pin directly to the feedback resistors.
The resistor divider must be connected between VOUT
and SGND.
APPLICATIONS INFORMATION
相關(guān)PDF資料
PDF描述
LTC3615EFE-1#TRPBF SWITCHING REGULATOR, PDSO24
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LTC3615EUF#PBF SWITCHING REGULATOR, PQCC24
LTC3615EFE#PBF SWITCHING REGULATOR, PDSO24
LTC3615IFE-1#PBF SWITCHING REGULATOR, PDSO24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3614IUDD#PBF 功能描述:IC REG BUCK SYNC ADJ 4A 24QFN 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
LTC3614IUDD#TRPBF 功能描述:IC REG BUCK SYNC ADJ 4A 24QFN 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
LTC3614MPUDD#PBF 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 4A 24QFN
LTC3614MPUDD#TRPBF 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 4A 24QFN
LTC3615EFE#PBF 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP 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
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