LT3641_15 Datasheet, PDF (2/28 Pages) Linear Technology – Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer

LT3641
ABSOLUTE MAXIMUM RATINGS (Note 1)
V_IN, 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
V_IN2, SYNC, EN2, PGOOD2, 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 (V_IN2 + 0.3V)
Operating Junction Temperature Range (Note 2)
LT3641E ................................................. –40°C to 125°C
LT3641I.................................................. –40°C to 125°C
LT3641H................................................. –40°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature, FE Only (Soldering, 10 sec) .... 300°C
PIN CONFIGURATION
TOP VIEW
FB2 1
PGOOD2 2
28 SS2
27 EN2
EN/UVLO 3
26 GND
SYNC 4
25 SW2
SS1 5
FB1 6
24 V_IN2
23 GND
RT 7
29
22 V_IN
RST2 8
GND
21 BST
RST1 9
20 SW
WDO 10
19 SW1
CWDT 11
18 DA
CPOR 12
WDE 13
17 NC
16 GND
WDI 14
15 GND
FE PACKAGE
28-LEAD PLASTIC TSSOP
θ_JA = 30°C/W, θ_JC = 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
21 V_IN2
FB1 3
20 GND
RT 4
RST2 5
RST1 6
WDO 7
29
19 V_IN
GND
18 BST
17 SW
16 SW1
CWDT 8
15 DA
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
θ_JA = 43°C/W, θ_JC = 3.4°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
LT3641EFE#PBF
LT3641EFE#TRPBF
LT3641FE
28-Lead Plastic TSSOP
–40°C to 125°C
LT3641IFE#PBF
LT3641IFE#TRPBF
LT3641FE
28-Lead Plastic TSSOP
–40°C to 125°C
LT3641HFE#PBF
LT3641HFE#TRPBF
LT3641FE
28-Lead Plastic TSSOP
–40°C to 150°C
LT3641EUFD#PBF
LT3641EUFD#TRPBF
3641
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3641IUFD#PBF
LT3641IUFD#TRPBF
3641
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/
3641fa
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