參數(shù)資料
型號(hào)： LTC3544EUD
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 0.8 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC16
封裝： 3 X 3 MM, LEAD FREE, PLASTIC, MO220WEED-2, QFN-16
文件頁(yè)數(shù)： 5/16頁(yè)
文件大小： 295K
代理商： LTC3544EUD
LTC3544
13
3544fa
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the LTC3544. These items are also illustrated graphically
in Figures 3 and 4. Check the following in your layout:
1. The power traces, consisting of the PGND trace, the
GNDA trace, the SW traces, the PVIN trace and the VCC
trace should be kept short, direct and wide.
2. Does each of the VFBx pins connect directly to the
respective feedback resistors? The resistive dividers
must be connected between the (+) plate of the corre-
sponding output lter capacitor (e.g., C13) and GNDA.
If the circuit being powered is at such a distance from
the part where voltage drops along circuit traces are
large, consider a Kelvin connection from the powered
circuit back to the resistive dividers.
APPLICATIONS INFORMATION
3. Keep C8 and C9 as close to the part as possible.
4. Keep the switching nodes (SWx) away from the sensi-
tive VFBx nodes.
5. Keep the ground connected plates of the input and
output capacitors as close as possible.
6. Care should be taken to provide enough space between
unshielded inductors in order to minimize any trans-
former coupling.
Design Example
As a design example, consider using the LTC3544 as a
portable application with a Li-Ion battery. The battery
provides VIN ranging from 2.8V to 4.2V. The demand at
2.5V is 250mA necessitating the use of the 300mA output
for this requirement.
C6
R5
R6
L2
C4
VOUT3
C12
R8
R11
L3
C10
VOUT2
C3
C1
R2
VOUT4
3544 F03
R3
SW200B
SW300
PGND
PVIN
SW1000
RUN100
GNDA
C15
R15
R16
RUN100
VFB100
RUN200A
SW200A
VFB200B
VFB200A
VFB200B
VFB300
RUN300
RUN200B
VFB200A
VCC GNDA
PGND
VCC
2.25V TO 5.5V
PVIN
2.25V TO 5.5V
C8
L4
L1
LTC3544
C9
C13
VOUT1
Figure 3. LTC3544 Layout Diagram
Figure 4. LTC3544 Suggested Layout
C1
C9
C10
GND
L1
L4
L2
L3
PGND
3544 F04
VCC
C4
C3
C2
相關(guān)PDF資料
PDF描述
LTC3547BEDDB 0.7 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO8
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LTC3549EDCB#TR 0.6 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6
LTC3553EUD#TRPBF 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3544EUD#PBF 功能描述:IC REG BUCK SYNC ADJ QUAD 16QFN 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(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
LTC3544EUD#TRPBF 功能描述:IC REG BUCK SYNC ADJ QUAD 16QFN 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
LTC3544EUDPBF 制造商:Linear Technology 功能描述:2.25MHz Sync Step-Down Converter LTC3544
LTC3544EUD-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA
LTC3544EUD-TR 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA
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