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LTC3868IUH Datasheet(PDF) 2 Page - Linear Technology

Part # LTC3868IUH
Description  Low IQ, Dual 2-Phase Synchronous Step-Down Controller
Download  38 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3868IUH Datasheet(HTML) 2 Page - Linear Technology

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LTC3868

3868fb
pin conFiguraTion
absoluTe MaxiMuM raTings
(Note 1)
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1
TOP VIEW
SENSE1
FREQ
PHASMD
CLKOUT
PLLIN/MODE
SGND
RUN1
RUN2
BOOST1
BG1
VIN
PGND
EXTVCC
INTVCC
BG2
BOOST2
UH PACKAGE
32-LEAD (5mm 5mm) PLASTIC QFN
33
SGND
TJMAX=125°C,θJA=34°C/W
EXPOSEDPAD(PIN33)ISSGND,MUSTBESOLDEREDTOPCB
orDer inForMaTion
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3868EUH#PBF
LTC3868EUH#TRPBF
3868
32-Lead(5mm
×5mm)PlasticQFN
–40°Cto85°C
LTC3868IUH#PBF
LTC3868IUH#TRPBF
3868
32-Lead(5mm
×5mm)PlasticQFN
–40°Cto85°C
ConsultLTCMarketingforpartsspecifiedwithwideroperatingtemperatureranges.*Thetemperaturegradeisidentifiedbyalabelontheshipping
container.ConsultLTCMarketingforinformationonnon-standardleadbasedfinishparts.
Formoreinformationonleadfreepartmarking,goto:http://www.linear.com/leadfree/
Formoreinformationontapeandreelspecifications,goto:http://www.linear.com/tapeandreel/
InputSupplyVoltage(VIN)......................... –0.3Vto28V
TopsideDriverVoltages
BOOST1,BOOST2................................. –0.3Vto34V
SwitchVoltage(SW1,SW2)........................ –5Vto28V
(BOOST1-SW1),(BOOST2-SW2)................ –0.3Vto6V
RUN1,RUN2................................................ –0.3Vto8V
MaximumCurrentSourcedintoPinfrom
Source>8V......................................................100µA
SENSE1+,SENSE2+,SENSE1
SENSE2Voltages...................................... –0.3Vto16V
PLLIN/MODE,FREQVoltages.............. –0.3VtoINTVCC
ILIM,PHASMDVoltages....................... –0.3VtoINTVCC
EXTVCC...................................................... –0.3Vto14V
ITH1,ITH2,VFB1,VFB2Voltages...................... –0.3Vto6V
PGOOD1,PGOOD2Voltages....................... –0.3Vto6V
SS1,SS2,INTVCCVoltages......................... –0.3Vto6V
OperatingTemperatureRange(Note2)... –40°Cto85°C
JunctionTemperature(Note3)............................. 125°C
StorageTemperatureRange................... –65°Cto150°C
elecTrical characTerisTics
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
InputSupplyOperatingVoltageRange
4
24
V
VFB1,2
RegulatedFeedbackVoltage
(Note4)ITH1,2Voltage=1.2V
l
0.788
0.8
0.812
V
IFB1,2
FeedbackCurrent
(Note4)
±5
±50
nA
VREFLNREG
ReferenceVoltageLineRegulation
(Note4)VIN=4.5Vto24V
0.002
0.02
%/V
VLOADREG
OutputVoltageLoadRegulation
(Note4)
MeasuredinServoLoop,
∆ITHVoltage=1.2Vto0.7V
l
0.01
0.1
%
(Note4)
MeasuredinServoLoop,
∆ITHVoltage=1.2Vto2V
l
–0.01
–0.1
%
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VRUN1,2 = 5V, EXTVCC = 0V unless otherwise noted.


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