Datasheet

LTC3853
2
3853fa
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (V
IN
) ......................... 28V to –0.3V
Topside Driver Voltages
BOOST1, BOOST2, BOOST3 .................. 34V to –0.3V
Switch Voltage (SW1, SW2, SW3) ................ 28V to –5V
INTV
CC
, RUN1, RUN2, RUN3, PGOOD12, PGOOD3,
DRV
CC12
, EXTV
CC
, (BOOST1-SW1),
(BOOST2-SW2), (BOOST3-SW3) ................. 6V to –0.3V
SENSE1
+
, SENSE2
+
, SENSE1
,
SENSE2
Voltages ..................................... 5.7V to –0.3V
SENSE3
+
, SENSE3
.................................... 14V to –0.3V
V
FB2
........................................................ 300µA Max I
FB2
MODE/PLLIN, I
LIM
,TK/SS1,
TK/SS2, TK/SS3 Voltages ..................... INTV
CC
to –0.3V
I
TH1
, I
TH2
, I
TH3
, V
FB1
, V
FB3
Voltages ...... INTV
CC
to –0.3V
INTV
CC
Peak Output Current ................................150mA
Operating Junction Temperature Range
(Note 3) .................................................. –40°C to 125°C
Storage Temperature Range ................... –65°C to 125°C
(Note 1)
3940 38 37 36 35 34 33 32 31
11 20
12 13 14 15
TOP VIEW
41
16 17 18 19
22
23
24
25
26
27
28
29
9
8
7
6
5
4
3
2
TK/SS2
TK/SS3
SNSP1
SNSN1
SNSP2
SNSN2
SNSP3
SNSN3
V
FB1
I
TH1
BG1
DRV
CC12
BG2
SW2
TG2
BOOST2
V
IN
EXTV
CC
INTV
CC
BG3
TK/SS1
I
LIM
FREQ/PLLFLTR
MODE/PLLIN
RUN1
RUN2
RUN3
BOOST1
TG1
SW1
SGND
V
FB2
I
TH2
V
FB3
I
TH3
PGOOD3
PGOOD12
BOOST3
TG3
SW3
21
30
10
1
UJ PACKAGE
40-LEAD (6mm × 6mm) PLASTIC QFN
T
JMAX
= 125°C, θ
JA
= 33°C/W
EXPOSED PAD (PIN 41) IS PGND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3853EUJ#PBF LTC3853EUJ#TRPBF LTC3853UJ 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C
LTC3853IUJ#PBF LTC3853IUJ#TRPBF LTC3853UJ 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3853EUJ LTC3853EUJ#TR LTC3853UJ 40-Lead (6mm × 6mm) Plastic QFN –40°C to 125°C
LTC3853IUJ LTC3853IUJ#TR LTC3853UJ 40-Lead (6mm × 6mm) 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/