LT3694/LT3694-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
IN
, EN/UVLO (Note 6) ............................... –0.3V to 70V
BST ...........................................................................55V
BST Above SW ..........................................................25V
PGOOD......................................................................16V
TRK/SS, V
C
, FB, RT, SYNC Pins ...................................6V
BIAS, LIM2, LIM3 Pins ...............................................7V
Operating Junction Temperature Range (Notes 2 and 5)
LT3694E ............................................. –40°C to 125°C
LT3694I .............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 Sec)
(TSSOP Only) ................................................... 300°C
PIN CONFIGURATION
TOP VIEW
GND
GND
SW
SW
V
IN
V
IN
TOP VIEW
V
IN
EN/UVLO
SYNC(CLKOUT)
PGOOD
RT
TRK/SS1
TRK/SS2
FB2
DRV2
1
2
3
4
5
6
7
8
9
21
GND
20 SW
19 DA
18 BST
17 BIAS
16 V
C1
15 FB1
14 TRK/SS3
13 FB3
12 DRV3
11 LIM3
28 27 26 25 24 23
EN/UVLO 1
SYNC (CLKOUT) 2
PGOOD 3
RT 4
TRK/SS1 5
TRK/SS2 6
FB2 7
DRV2 8
9 10 11 12 13 14
LIM2
LIM3
GND
GND
GND
GND
29
GND
22 DA
21 BST
20 BIAS
19 V
C1
18 FB1
17 TRK/SS3
16 FB3
15 DRV3
LIM2 10
UFD PACKAGE
28-LEAD (4mm
×
5mm) PLASTIC QFN
θ
JA
= 34°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
LT3694-1 PINOUT IS SHOWN IN PARENTHESIS
FE PACKAGE
20-LEAD PLASTIC TSSOP
θ
JA
= 38°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
LT3694-1 PINOUT IS SHOWN IN PARENTHESIS
ORDER INFORMATION
LEAD FREE FINISH
LT3694EUFD#PBF
LT3694IUFD#PBF
LT3694EFE#PBF
LT3694IFE#PBF
LT3694-1EUFD#PBF
LT3694-1IUFD#PBF
LT3694-1EFE#PBF
LT3694-1IFE#PBF
TAPE AND REEL
LT3694EUFD#TRPBF
LT3694IUFD#TRPBF
LT3694EFE#TRPBF
LT3694IFE#TRPBF
LT3694-1EUFD#TRPBF
LT3694-1IUFD#TRPBF
LT3694-1EFE#TRPBF
LT3694-1IFE#TRPBF
PART MARKING*
3694
3694
LT3694FE
LT3694FE
36941
36941
LT3694FE-1
LT3694FE-1
PACKAGE DESCRIPTION
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
20-Lead Plastic TSSOP
20-Lead Plastic TSSOP
28-Lead (4mm
×
5mm) Plastic QFN
28-Lead (4mm
×
5mm) Plastic QFN
20-Lead Plastic TSSOP
20-Lead Plastic TSSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–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/
36941fb
2
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