Low Voltage Regulators ........................................................................................................................................ 20
Applications Information .......................................................................................................24
High Voltage Buck Controller ................................................................................................................................ 24
Low Voltage Buck Regulators ............................................................................................................................... 34
(Notes 2, 3) ..............................................–40C to 150°C
Storage Temperature Range .................. –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
PGOOD
V
OUTRPG
ITH
SENSE
+
SENSE
–
V
OUT
/EXTV
CC
TRACK/SS
V
IN
RUN
BOOST
SW
TG
48
47
46
45
44
43
42
41
40
39
38
37
RST
1
TEMP 2
EN1 3
FB1 4
V
INA
5
SWA 6
SWB 7
V
INB
8
V
INC
9
SWC 10
SWD 11
V
IND
12
49
GND
36
35
34
33
32
31
30
29
28
27
26
25
BG
INTV
CC
EN4
FB4
V
INH
SWH
SWG
V
ING
V
INF
SWF
SWE
V
INE
UK PACKAGE
48-LEAD (7mm
×
7mm) PLASTIC QFN
T
JMAX
= 150°C,
θ
JA
= 34°C/W
EXPOSED PAD (PIN 49) IS GND, MUST BE SOLDERED TO PCB
FB2 13
EN2 14
C1 15
C2 16
C3 17
RT 18
PLL/MODE 19
WDI 20
WDO 21
CT 22
EN3 23
FB3 24
For more information
www.analog.com
3
Rev 0
LTC3372
ORDER INFORMATION
LEAD FREE FINISH
LTC3372EUK#PBF
LTC3372IUK#PBF
LTC3372HUK#PBF
TAPE AND REEL
LTC3372EUK#TRPBF
LTC3372IUK#TRPBF
LTC3372HUK#TRPBF
PART MARKING*
LTC3372UK
LTC3372UK
LTC3372UK
PACKAGE DESCRIPTION
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2), V
IN
= 12V, V
RUN
= 5V, V
OUT
= V
INA-H
= 3.3V unless
otherwise noted.
SYMBOL
V
IN
I
Q
(Forced
Continuous/
Pulse-
Skipping
Mode)
I
Q
(Burst
Mode)
PARAMETER
V
IN
Pin Operating Voltage Range
No-Load V
IN
Pin DC Current
No-Load V
OUT
/EXTV
CC
Pin + SENSE
–
Pin
DC Current
No-Load V
IN
Pin DC Current
No-Load V
OUT
/EXTV
CC
Pin + SENSE
–
Pin
DC Current
No-Load V
IN
Pin DC Current
No-Load V
OUT
/EXTV
CC
Pin DC Current
HV Controller On Only
HV Controller and One LV Regulator On
Additional I
Q
, per LV Regulator On
Additional I
Q
, Watchdog On (Float CT Pin)
Additional I
Q
, TEMP On (Float TEMP Pin)
No-Load SENSE
–
Pin DC Current
No-Load V
IN
Pin DC Current
HV Controller On Only
HV Controller and LV Regulator On
Additional I
Q
, Watchdog On (Float CT Pin)
Additional I
Q
, TEMP On (Float TEMP Pin)
No-Load V
OUT
/EXTV
CC
Pin DC Current
HV Controller On Only
HV Controller and One LV Regulator On
Additional I
Q
, per LV Regulator On
Additional I
Q
, Watchdog On (Float CT Pin)
Additional I
Q
, TEMP On (Float TEMP Pin)
I
Q
(Note 4)
(Burst
Mode)
Total No-Load Input Supply Current
HV Controller On Only
HV Controller and One LV Regulator On
Additional I
Q
, per LV Regulator On
Additional I
Q
, Watchdog On (Float CT Pin)
Additional I
Q
, TEMP On (Float TEMP Pin)
Total No-Load Input Supply Current
HV Controller On Only
HV Controller and One LV Regulator On
Additional I
Q
, per LV Regulator On
Additional I
Q
, Watchdog On (Float CT Pin)
Additional I
Q
, TEMP On (Float TEMP Pin)
I
SD
V
IN
Pin Current in Shutdown
PLL/MODE = GND
(Burst Mode)
V
IN
= 12V, V
INA-H
= V
OUT
(LV
Regulators Powered from HV
Regulator’s Output), No Load on
V
OUT
or V
OUT1-4
.
PLL/MODE = INTV
CC
/(INTV
CC
/2) V
OUTPRG
=
Run = V
IN
INTV
CC
EN1-4 = GND
(5V V
OUT
)
V
OUTPRG
=
GND
(3.3V V
OUT
)
V
OUTPRG
=
INTV
CC
(5V V
OUT
)
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
4.5
TYP
7
1450
1300
130
4
20
52
+26
+7
+15
0.5
22
23
+1
+2
4
29
+23
+6
+13
15
31
+14
+4
+8
23
33
+9
+3
+7
3.5
MAX
60
UNITS
V
µA
µA
µA
µA
10
46
74
+39
+12
2
42
33
+4.2
8.5
39
+33
+8
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
μA
Rev 0
l
CT = TEMP = INTV
CC
(Watchdog V
OUTPRG
=
l
GND
and TEMP Monitor Off, Unless
(3.3V V
OUT
)
Otherwise Specified)
l
PLL/MODE = GND
V
IN
= 12V, V
INA-H
= V
OUT
(LV
Regulators Powered from HV
Regulator’s Output), No Load on
V
OUT
or V
OUT1-4
V
OUTPRG
=
INTV
CC
(5V V
OUT
)
l
35
45
+20
+6
V
OUTPRG
=
l
GND
CT = TEMP = INTV
CC
(Watchdog
(3.3V V
OUT
)
and TEMP Monitor Off, unless
otherwise specified)
RUN = EN1-4 = GND
46
46
+12
+7
8
4
For more information
www.analog.com
LTC3372
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
