Datasheet

2
LTC1474/LTC1475
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Operating Ambient Temperature Range
Commercial ............................................ 0°C to 70°C
Industrial ............................................ –40°C to 85°C
Junction Temperature (Note 1)............................ 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
Input Supply Voltage (V
IN
).........................–0.3V to 20V
Switch Current (SW, SENSE).............................. 750mA
Switch Voltage (SW) ............. (V
IN
– 20V) to (V
IN
+ 0.3V)
V
FB
(Adjustable Versions) ..........................–0.3V to 12V
V
OUT
(Fixed Versions)................................ –0.3V to 20V
LBI, LBO ....................................................–0.3V to 20V
RUN, SENSE ..................................–0.3V to (V
IN
+ 0.3V)
PACKAGE/ORDER INFORMATION
W
U
U
S8 PART MARKING
1475
1475I
147533
14755
Consult factory for Military grade parts.
1474
1474I
147433
14745
474I33
1474I5
LTBW
LTCR
LTCS
MS8 PART MARKING
LTBK
LTCP
LTCQ
MS8 PART MARKING S8 PART MARKING
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
1
2
3
4
8
7
6
5
V
OUT
/V
FB
LBO
LBI
GND
RUN
V
IN
SENSE
SW
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
1
2
3
4
8
7
6
5
V
OUT
/V
FB
LBO
LBI/OFF
GND
ON
V
IN
SENSE
SW
1
2
3
4
V
OUT
/V
FB
LBO
LBI
GND
8
7
6
5
RUN
V
IN
SENSE
SW
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
1
2
3
4
V
OUT
/V
FB
LBO
LBI/OFF
GND
8
7
6
5
ON
V
IN
SENSE
SW
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 150°C/W T
JMAX
= 125°C, θ
JA
= 110°C/W T
JMAX
= 125°C, θ
JA
= 110°C/WT
JMAX
= 125°C, θ
JA
= 150°C/W
ORDER PART NUMBER ORDER PART NUMBER ORDER PART NUMBERORDER PART NUMBER
LTC1475CMS8
LTC1475CMS8-3.3
LTC1475CMS8-5
LTC1474CS8
LTC1474IS8
LTC1474CS8-3.3
LTC1474CS8-5
LTC1474IS8-3.3
LTC1474IS8-5
LTC1474CMS8
LTC1474CMS8-3.3
LTC1474CMS8-5
LTC1475CS8
LTC1475IS8
LTC1475CS8-3.3
LTC1475CS8-5