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LTC3890 Datasheet, PDF (2/36 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller | |||
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LTC3890
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (VIN) ......................... â0.3V to 65V
Topside Driver Voltages
BOOST1, BOOST2 ................................ â0.3V to 71V
Switch Voltage (SW1, SW2) ........................ â5V to 65V
(BOOST1-SW1), (BOOST2-SW2) ................ â0.3V to 6V
RUN1, RUN2 ............................................... â0.3V to 8V
Maximum Current Sourced into Pin from
Source > 8V .....................................................100μA
SENSE1+, SENSE2+, SENSE1â
SENSE2â Voltages...................................... â0.3V to 28V
PLLIN/MODE, FREQ Voltages .............. â0.3V to INTVCC
ILIM, PHASMD Voltages ....................... â0.3V to INTVCC
EXTVCC ...................................................... â0.3V to 14V
ITH1, ITH2, VFB1, VFB2 Voltages................... â0.3V to 6V
PGOOD1, PGOOD2 Voltages ....................... â0.3V to 6V
TRACK/SS1, TRACK/SS2 Voltages .............. â0.3V to 6V
Operating Junction Temperature Range
(Note 2) ................................................. â40°C to 125°C
Maximum Junction Temperature (Note 3) ............ 125°C
Storage Temperature Range................... â65°C to 150°C
PIN CONFIGURATION
TOP VIEW
32 31 30 29 28 27 26 25
SENSE1â 1
24 BOOST1
FREQ 2
23 BG1
PHASMD 3
CLKOUT 4
PLLIN/MODE 5
SGND 6
RUN1 7
33
SGND
22 VIN
21 PGND
20 EXTVCC
19 INTVCC
18 BG2
RUN2 8
17 BOOST2
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm à 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/W
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3890EUH#PBF
LTC3890EUH#TRPBF 3890
32-Lead (5mm à 5mm) Plastic QFN
â40°C to 125°C
LTC3890IUH#PBF
LTC3890IUH#TRPBF
3890
32-Lead (5mm à 5mm) Plastic QFN
â40°C to 125°C
Consult LTC Marketing for parts speciï¬ed with wider operating temperature ranges. *The temperature grade is identiï¬ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based ï¬nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel speciï¬cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the speciï¬cations which apply over the full operating
junction temperature range, otherwise speciï¬cations are at TJ = 25°C. VIN = 12V, VRUN1,2 = 5V, EXTVCC = 0V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
VIN
VFB1,2
Input Supply Operating Voltage Range
Regulated Feedback Voltage
(Note 4) ITH1,2 Voltage = 1.2V
â40°C to 125°C
â40°C to 85°C
4
60
V
V
l 0.788 0.800 0.812
V
0.792 0.800 0.808
V
IFB1,2
VREFLNREG
Feedback Current
Reference Voltage Line Regulation
(Note 4)
(Note 4) VIN = 4.5V to 60V
±5
±50
nA
0.002 0.02
%/V
3890f
2
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