Datasheet
LTC3766
2
3766fa
For more information www.linear.com/LTC3766
absoluTe MaxiMuM raTings
V
CC
Voltage .................................................–0.3V to 12V
V
IN
Voltage ................................................. –0.3V to 33V
RUN Voltage............................................... –0.3V to 33V
SW
Low Impedance Source ............................ –5V to 40V
Current Fed .......... 2mA DC or 0.2A for <1μs Into Pin*
V
AUX
, V
S
+
, V
S
–
, V
SOUT
, NDRV Voltages ...... –0.3V to 16V
ITH, I
S
+
, REGSD Voltages ............................ –0.3V to 6V
PHASE Voltage ............................................. –0.3V to 6V
I
S
–
, SGD, FGD Voltages ...............................–0.3V to 12V
FS/SYNC, FB, MODE Voltages .....................–0.3V to 12V
(Note 1)
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
SG
FG
V
SEC
MODE
PHASE
FB
ITH
RUN
SS
I
PK
V
SOUT
V
S
+
V
S
–
GND
V
CC
PGND
PT
+
PT
–
V
AUX
SW
V
IN
NDRV
FGD
SGD
I
S
+
I
S
–
REGSD
FS/SYNC
T
JMAX
= 125°C, θ
JA
= 95°C/W
9 10
TOP VIEW
29
GND
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
MODE
PHASE
FB
ITH
RUN
SS
I
PK
V
SOUT
PT
–
V
AUX
SW
V
IN
NDRV
FGD
SGD
I
S
+
V
SEC
FG
SG
V
CC
PGND
PT
+
V
S
+
V
S
–
GND
FS/SYNC
REGSD
I
S
–
7
17
18
19
20
21
22
16
8
15
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
pin conFiguraTion
V
SEC
Voltage ................................................ –0.3V to 3V
I
PK
, SS Voltages ........................................... –0.3V to 4V
Operating Junction Temperature Range (Notes 2,3)
LTC3766E, LTC3766I ......................... –40°C to 125°C
LTC3766H .......................................... –40°C to 150°C
LTC3766MP ....................................... –55°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec )
GN Package ..................................................... 300°C
*The LTC3766 contains an internal 50V clamp that limits the voltage on the
SW pin.