Datasheet
LTC3868-1
2
38681fd
ABSOLUTE MAXIMUM RATINGS
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3868EUFD-1#PBF LTC3868EUFD-1#TRPBF 38681
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC3868IUFD-1#PBF LTC3868IUFD-1#TRPBF 38681
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC3868EGN-1#PBF LTC3868EGN-1#TRPBF LTC3868GN-1 28-Lead Plastic SSOP –40°C to 85°C
LTC3868IGN-1#PBF LTC3868IGN-1#TRPBF LTC3868GN-1 28-Lead Plastic SSOP –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping
container.Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
F
or more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
Input Supply Voltage (V
IN
) ......................... –0.3V to 28V
Topside Driver Voltages
BOOST1, BOOST2 ................................. –0.3V to 34V
Switch Voltage (SW1, SW2) ........................ –5V to 28V
PLLIN/MODE,
(BOOST1-SW1), (BOOST2-SW2) ................ –0.3V to 6V
RUN1, RUN2 ............................................... –0.3V to 8V
Maximum Current Sourced into Pin from
Source >8V ......................................................100µA
SENSE1
+
, SENSE2
+
, SENSE1
–
SENSE2
–
Voltages ...................................... –0.3V to 16V
9 10
TOP VIEW
29
SGND
UFD PACKAGE
28-LEAD (4mm s 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
SENSE1
+
SENSE1
–
FREQ
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
–
BOOST1
BG1
V
IN
PGND
EXTV
CC
INTV
CC
BG2
BOOST2
V
FB1
I
TH1
SS1
PGOOD1
TG1
SW1
SENSE2
+
V
FB2
I
TH2
SS2
TG2
SW2
7
17
18
19
20
21
22
16
8
15
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 29) IS SGND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
GN PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
I
TH1
V
FB1
SENSE1
+
SENSE1
–
FREQ
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
–
SENSE2
+
V
FB2
I
TH2
SS2
SS1
PGOOD1
TG1
SW1
BOOST1
BG1
V
IN
PGND
EXTV
CC
INTV
CC
BG2
BOOST2
SW2
TG2
T
JMAX
= 125°C, θ
JA
= 90°C/W
PIN CONFIGURATION
FREQ Voltages ..................................... –0.3V to INTV
CC
EXTV
CC
...................................................... –0.3V to 14V
I
TH1
, I
TH2
, V
FB1
, V
FB2
Voltages ..................... –0.3V to 6V
PGOOD1 Voltage ......................................... –0.3V to 6V
SS1, SS2, INTV
CC
Voltages ......................... –0.3V to 6V
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
SSOP ................................................................ 300°C