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參數(shù)資料
| 型號(hào)： | LTC3526LEDC#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.55 A SWITCHING CONTROLLER, 1250 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 2 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WCCD-2, DFN-6 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 339K |
| 代理商： | LTC3526LEDC#PBF |
LTC3526L/LTC3526LB
0
3526lfc
VIN > VOUT OPERATION
TheLTC3526L/LTC3526LBwillmaintainvoltageregulation
evenwhentheinputvoltageisabovethedesiredoutput
voltage.Notethattheefficiencyismuchlowerinthismode,
andthemaximumoutputcurrentcapabilitywillbeless.
RefertotheTypicalPerformanceCharacteristics.
SHORT-CIRCUIT PROTECTION
TheLTC3526L/LTC3526LBoutputdisconnectfeatureal-
lowsoutputshortcircuitwhilemaintainingamaximum
internallysetcurrentlimit.Toreducepowerdissipation
undershort-circuitconditions,thepeakswitchcurrent
limitisreducedto400mA(typical).
SCHOTTKY DIODE
Althoughnotrecommended,addingaSchottkydiodefrom
SWtoVOUTwillimproveefficiencybyabout2%.Note
thatthisdefeatstheoutputdisconnectandshort-circuit
protectionfeatures.
PCB LAYOUT GUIDELINES
ThehighspeedoperationoftheLTC3526L/LTC3526LB
demands careful attention to board layout. A careless
layoutwillresultinreducedperformance.Figure2shows
therecommendedcomponentplacement.Alargeground
pincopperareawillhelptolowerthedietemperature.A
multilayerboardwithaseparategroundplaneisideal,but
notabsolutelynecessary.
COMPONENT SELECTION
Inductor Selection
TheLTC3526L/LTC3526LBcanutilizesmallsurfacemount
chipinductorsduetotheirfast1MHzswitchingfrequency.
Inductorvaluesbetween3.3Hand6.8Haresuitablefor
mostapplications.Largervaluesofinductancewillallow
slightlygreateroutputcurrentcapability(andlowerthe
BurstModethreshold)byreducingtheinductorripplecur-
rent.Increasingtheinductanceabove10Hwillincrease
component size while providing little improvement in
outputcurrentcapability.
Theminimuminductancevalueisgivenby:
L
V
Ripple V
IN MIN
OUT MAX
IN MIN
OUT
>
(
)
(
)
(
)
(
)
(
–
M
MAX)
where:
Ripple=Allowableinductorcurrentripple(ampspeak-
peak)
VIN(MIN)=Minimuminputvoltage
VOUT(MAX)=Maximumoutputvoltage
Theinductorcurrentrippleistypicallysetfor20%to
40%ofthemaximuminductorcurrent.Highfrequency
ferritecoreinductormaterialsreducefrequencydependent
powerlossescomparedtocheaperpowderedirontypes,
improvingefficiency.TheinductorshouldhavelowESR
(seriesresistanceofthewindings)toreducetheI2Rpower
Figure 2. Recommended Component Placement for Single Layer Board
+
SW
LTC3526L
1
GND
MINIMIZE
TRACE ON FB
AND SW
2
VIN
MULTIPLE VIAS
TO GROUND PLANE
VIN
VOUT
FB
SHDN
3526l F02
3
6
5
4
ApplicAtions inForMAtion
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3526LEDC-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:550mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN |
| LTC3527 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up |
| LTC3527-1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters |
| LTC3527EUD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters |
| LTC3527EUD#PBF | 功能描述:IC REG BOOST SYNC ADJ DL 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 |
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