Datasheet
LTC3789
2
3789fa
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Input Supply Voltage (V
IN
) ......................... 40V to –0.3V
Topside Driver Voltages
(BOOST1, BOOST2)................................... 46V to –0.3V
Switch Voltage (SW1, SW2) .......................... 40V to –5V
Current Sense Voltages (I
OSENSE
+
, I
OSENSE
–
).. 40V to –0.3V
BOOST1, BOOST2 – SW1, SW2 ................... 6V to –0.3V
TG1, TG2 – SW1, SW2 ................................. 6V to –0.3V
EXTV
CC
Voltage ......................................... 14V to –0.3V
INTV
CC
Voltage ............................................ 6V to –0.3V
SENSE
+
, SENSE
–
Voltages ....................INTV
CC
to –0.3V
MODE/PLLIN, SS Voltages ...................INTV
CC
to –0.3V
(Note 1)
V
INSNS
, V
OUTSNS
........................................ 40V to –0.3V
BG1, BG2 Voltages ............................... INTV
CC
to –0.3V
I
TH
, FREQ, I
LIM
Voltages .......................INTV
CC
to –0.3V
V
FB
Voltage ............................................... 2.7V to –0.3V
RUN, PGOOD Voltage .................................. 6V to –0.3V
Operating Junction Temperature Range
(Notes 2, 3) ............................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 125°C
INTV
CC
Peak Output Current ................................100mA
Lead Temperature (Soldering, 10 sec.)
GN Package ......................................................300°C
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3789EGN#PBF LTC3789EGN#TRPBF LTC3789 28-Lead Narrow Plastic SSOP –40°C to 125°C
LTC3789IGN#PBF LTC3789IGN#TRPBF LTC3789 28-Lead Narrow Plastic SSOP –40°C to 125°C
LTC3789EUFD#PBF LTC3789EUFD#TRPBF 3789 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C
LTC3789IUFD#PBF LTC3789IUFD#TRPBF 3789 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.
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/
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
GN PACKAGE
28-LEAD NARROW PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
FB
SS
SENSE
+
SENSE
–
I
TH
SGND
MODE/PLLIN
FREQ
RUN
V
INSNS
V
OUTSNS
I
LIM
I
OSENSE
+
I
OSENSE
–
PGOOD
SW1
TG1
BOOST1
PGND
BG1
V
IN
INTV
CC
EXTV
CC
BG2
BOOST2
TG2
SW2
TRIM
T
JMAX
= 125°C, θ
JA
= 80°C/W
9 10
TOP VIEW
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
SENSE
–
I
TH
SGND
MODE/PLLIN
FREQ
RUN
V
INSNS
V
OUTSNS
BOOST1
PGND
BG1
V
IN
INTV
CC
EXTV
CC
BG2
BOOST2
SENSE
+
SS
V
FB
PGOOD
SW1
TG1
I
LIM
I
OSENSE
+
I
OSENSE
–
TRIM
SW2
TG2
7
17
18
19
20
21
22
16
8
15
29
SGND
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 29) IS SGND, MUST BE SOLDERED TO PCB
pin conFiguraTion