LT3975
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Note 1)
TOP VIEW
V , EN Voltage (Note 3) ...........................................42V
IN
1
2
3
4
5
6
7
8
SYNC
PG
FB
SS
16
15
14
BOOST Pin Voltage ...................................................55V
BOOST Pin Above SW Pin.........................................30V
FB, RT, SYNC, SS Voltage...........................................6V
PG Voltage................................................................30V
OUT Voltage..............................................................16V
Operating Junction Temperature Range (Note 2)
OUT
BOOST
SW
RT
17
GND
13 EN
12
11
10
9
V
V
V
IN
IN
IN
SW
SW
NC
NC
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
= 40°C/W
JA
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
LT3975E............................................. –40°C to 125°C
LT3975I.............................................. –40°C to 125°C
LT3975H ............................................ –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)...................300°C
ORDER INFORMATION
LEAD FREE FINISH
LT3975EMSE#PBF
LT3975IMSE#PBF
LT3975HMSE#PBF
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3975EMSE#TRPBF
LT3975IMSE#TRPBF
LT3975HMSE#TRPBF
3975
3975
3975
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
–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.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
PARAMETER
Minimum Input Voltage
CONDITIONS
(Note 3)
MIN
TYP
4
MAX
4.3
UNITS
V
l
Dropout Comparator Threshold
Dropout Comparator Threshold Hysteresis
(V – OUT) Falling
IN
430
500
25
570
mV
mV
Quiescent Current from V
V
V
V
Low
0.7
1.6
1.3
2.7
30
µA
µA
µA
IN
EN
EN
EN
High, V
High, V
Low
Low
SYNC
SYNC
l
l
FB Pin Current
V
= 1.5V
0.1
12
nA
FB
Feedback Voltage
1.183
1.173
1.197
1.197
1.212
1.222
V
V
l
FB Voltage Line Regulation
Switching Frequency
4.3V < V < 40V (Note 3)
0.0003
0.01
%/V
IN
R = 11.8k
1.8
0.8
160
2.25
1
200
2.7
1.2
240
MHz
MHz
kHz
T
R = 41.2k
T
R = 294k
T
Minimum Switch On-Time
Minimum Switch Off-Time (Note 4)
105
150
ns
ns
200
3975f
2
Linear [ Linear ]
