Datasheet

LTC3835
2
3835fd
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (V
IN
) ......................... 36V to –0.3V
Top Side Driver Voltage (BOOST) ............... 42V to –0.3V
Switch Voltage (SW) ..................................... 36V to –5V
INTV
CC
, (BOOST-SW), CLKOUT, PGOOD ... 8.5V to –0.3V
RUN, TRACK/SS ......................................... 7V to –0.3V
SENSE
+
, SENSE
–
Voltages ........................ 11V to –0.3V
PLLIN/MODE, PHASMD, PLLLPF ......... INTV
CC
to –0.3V
EXTV
CC
...................................................... 10V to –0.3V
I
TH
, V
FB
Voltages ...................................... 2.7V to –0.3V
(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
CLKOUT
PLLLPF
I
TH
TRACKS/SS
V
FB
SGND
PGND
BG
INTV
CC
EXTV
CC
PHASMD
PLLIN/MODE
PGOOD
SENSE
+
SENSE
–
RUN
BOOST
TG
SW
V
IN
21
SGND
T
JMAX
= 125°C, q
JA
= 35°C/W
EXPOSED PAD (PIN 21) IS SGND MUST BE SOLDERED TO PCB
20 19 18 17
7 8
TOP VIEW
UFD PACKAGE
20-PIN (4mm × 5mm) PLASTIC QFN
9 10
6
5
4
3
2
1
11
12
13
14
15
16
I
TH
TRACK/SS
V
FB
SGND
PGND
BG
PGOOD
SENSE
+
SENSE
–
RUN
BOOST
TG
PLLLPF CLKOUT PHASMD PLLIN/MODE
INTV
CC
EXTV
CC
V
IN
SW
21
SGND
T
JMAX
= 125°C, q
JA
= 37°C/W
EXPOSED PAD (PIN 21) IS SGND MUST BE SOLDERED TO PCB
PIN CONFIGURATION
Peak Output Current <10µs (TG,BG) ...........................3A
INTV
CC
Peak Output Current ................................. 50mA
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range
FE Package ........................................ –65°C to 150°C
Storage Temperature Range
UFD Package ..................................... –65°C to 125°C
Lead Temperature (FE Package, Soldering, 10 sec) ... 300°C