LT3640IFE 查看數據表（PDF） - Linear Technology
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LT3640IFE Datasheet PDF : 24 Pages
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LT3640
Absolute Maximum Ratings (Note 1)
VIN, EN/UVLO Voltage (Note 7)..................................55V
WDE Voltage..............................................................30V
BST Above SW, SW1 Voltage........................ –0.3V to 6V
SW1 Above SW Voltage............................... –0.3V to 6V
VIN2, SYNC, EN2, PGOOD, WDI,
WDO, RST1, RST2, Voltages........................ –0.3V to 6V
SS1, SS2, FB1, FB2, RT, CWDT,
CPOR Voltages……….............................. –0.3V to 2.5V
SW2 Voltage................................. –0.3V to (VIN2 + 0.3V)
Operating Junction Temperature Range (Note 2)
LT3640E.................................................. –40°C to 125°C
LT3640I.................................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature, FE Only (Soldering, 10 sec)..... 300°C
Pin Configuration
TOP VIEW
FB2 1
28 SS2
PGOOD 2
27 EN2
EN/UVLO 3
26 GND
SYNC 4
25 SW2
SS1 5
24 VIN2
FB1 6
23 GND
RT 7
29
22 VIN
RST2 8
GND
21 BST
RST1 9
20 SW
WDO 10
19 SW1
CWDT 11
18 DA
CPOR 12
17 NC
WDE 13
16 GND
WDI 14
15 GND
FE PACKAGE
28-LEAD PLASTIC TSSOP
θJA = 30°C/W, θJC = 8°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
28 27 26 25 24 23
SYNC 1
22 SW2
SS1 2
FB1 3
21 VIN2
20 GND
RT 4
RST2 5
29
19 VIN
GND
18 BST
RST1 6
17 SW
WDO 7
16 SW1
CWDT 8
15 DA
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm s 5mm) PLASTIC QFN
θJA = 34°C/W, θJC = 2.7°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3640EFE#PBF
LT3640EFE#TRPBF
LT3640FE
28-Lead Plastic TSSOP
–40°C to 125°C
LT3640IFE#PBF
LT3640IFE#TRPBF
LT3640FE
28-Lead Plastic TSSOP
–40°C to 125°C
LT3640EUFD#PBF
LT3640EUFD#TRPBF
3640
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3640IUFD#PBF
LT3640IUFD#TRPBF
3640
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
3640f
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