Datasheet
LT3579/LT3579-1
2
35791fa
For more information www.linear.com/LT3579
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
IN
Voltage .................................................–0.3V to 40V
SW1/SW2 Voltage .....................................–0.4V to 42V
R
T
Voltage ....................................................–0.3V to 5V
SS, FB Voltage .........................................–0.3V to 2.5V
V
C
Voltage ...................................................–0.3V to 2V
SHDN Voltage ............................................–0.3V to 40V
SYNC Voltage ............................................–0.3V to 5.5V
GATE Voltage .............................................–0.3V to 80V
(Note 1)
FE PACKAGE
20-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
9
10
TOP VIEW
20
19
18
17
16
15
14
13
12
11
FB
V
C
GATE
FAULT
V
IN
SW1
SW1
SW1
SW1
SW1
SYNC
SS
R
T
SHDN
CLKOUT
SW2
SW2
SW2
SW2
SW2
21
GND
T
JMAX
= 125°C, θ
JA
= 38°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
20 19 18 17
7 8
TOP VIEW
21
GND
UFD PACKAGE
20-LEAD (4mm × 5mm) PLASTIC QFN
9 10
6
5
4
3
2
1
11
12
13
14
15
16
GATE
FAULT
V
IN
SW1
SW1
SW1
R
T
SHDN
CLKOUT
SW2
SW2
SW2
FB
V
C
SS
SYNC
SW1
GND
GND
SW2
T
JMAX
= 125°C, θ
JA
= 34°C/W, θ
JC
= 2.7°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3579EFE#PBF LT3579EFE#TRPBF LT3579FE 20-Lead Plastic TSSOP –40°C to 125°C
LT3579IFE#PBF LT3579IFE#TRPBF LT3579FE 20-Lead Plastic TSSOP –40°C to 125°C
LT3579EUFD#PBF LT3579EUFD#TRPBF 3579
20-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3579IUFD#PBF LT3579IUFD#TRPBF 3579
20-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3579EFE-1#PBF LT3579EFE-1#TRPBF LT3579FE-1 20-Lead Plastic TSSOP –40°C to 125°C
LT3579IFE-1#PBF LT3579IFE-1#TRPBF LT3579FE-1 20-Lead Plastic TSSOP –40°C to 125°C
LT3579EUFD-1#PBF LT3579EUFD-1#TRPBF 35791
20-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3579IUFD-1#PBF LT3579IUFD-1#TRPBF 35791
20-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.
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/
FAULT .........................................................–0.3V to 40V
FAULT Current .....................................................±0.5mA
CLKOUT .......................................................–0.3V to 3V
CLKOUT Current ....................................................±1mA
Operating Junction Temperature Range
LT3579E (Notes 2, 4)
.........................–40°C to 125°C
LT3579I (Notes 2, 4) .......................... –40°C to 125°C
Storage Temperature Range ...................–65°C to 150°C