BD Voltage ................................................................30V
RT , V
C
Voltage ............................................................5V
RT Pin Current .........................................................1mA
SYNC Voltage ............................................................20V
FB Voltage ...................................................................5V
PG Voltage ................................................................30V
Operating Junction Temperature Range (Notes 4, 5)
LT3695E ............................................. –40°C to 125°C
LT3695I .............................................. –40°C to 125°C
LT3695H ............................................ –40°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
17
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C/W WITH EXPOSED PAD SOLDERED
θ
JA
= 110°C/W WITHOUT EXPOSED PAD SOLDERED
ORDER INFORMATION
LEAD FREE FINISH
LT3695EMSE#PBF
LT3695IMSE#PBF
LT3695HMSE#PBF
TAPE AND REEL
LT3695EMSE#TRPBF
LT3695IMSE#TRPBF
LT3695HMSE#TRPBF
PART MARKING*
3695
3695
3695
PACKAGE DESCRIPTION
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
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.
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/
3695f
2
LT3695
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Operating Voltage (Note 6)
V
IN
Overvoltage Lockout
Quiescent Current from V
IN
V
RUN/SS
= 0.2V
V
RUN/SS
= 10V, V
BD
= 3.3V, Not Switching
V
RUN/SS
= 10V, V
BD
= 0V, Not Switching
V
RUN/SS
= 0.2V
V
RUN/SS
= 10V, V
BD
= 3.3V, Not Switching
V
RUN/SS
= 10V, V
BD
= 0V, Not Switching
V
BD
= 3.3V
V
BD
< 3V
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
RUN/SS
= 10V, unless otherwise noted. (Note 4)
CONDITIONS
l
l
l
l
MIN
TYP
3.4
3.4
MAX
3.6
4.3
39.9
0.5
60
160
0.5
100
–5
3
808
815
–40
0.005
UNITS
V
V
V
μA
μA
μA
μA
μA
μA
V
mV
mV
nA
%/V
μS
V/V
μA
μA
A/V
36
38
0.01
35
90
Quiescent Current from BD Pin
l
35
0.01
55
0
2.8
800
800
–5
0.001
430
1300
50
50
1.25
Minimum BD Pin Voltage
Feedback Voltage
FB Pin Bias Current
Reference Voltage Line Regulation
Error Amp g
m
Error Amp Voltage Gain
V
C
Source Current
V
C
Sink Current
V
C
Pin to Switch Current Gain
V
C
Switching Threshold
V
C
Clamp Voltage
Switching Frequency
R
RT
= 8.06k
R
RT
= 29.4k
R
RT
= 158k
E- and I-Grades
H-Grade
SYNC = 0V
SYNC = 3.3V or Clocked
I
SW
= 1A
1.25
V
SW
= 0V, V
IN
= 36V
l
l
l
792
785
FB Pin Voltage = 800mV
3.6V < V
IN
< 36V
I
VC
= ±1.5μA
l
0.4
1.98
0.9
225
0.6
2
2.2
1.0
250
130
130
0.8
2.42
1.1
275
210
250
2
1.66
1.95
1
V
V
MHz
MHz
kHz
ns
ns
A
A
mV
A
μA
Minimum Switch Off-Time
Switch Current Limit (Note 7)
Switch V
CESAT
DA Pin Current to Stop OSC
Switch Leakage Current
1.45
1.18
1.7
1.4
350
1.6
0.01
3695f
3
LT3695
ELECTRICAL CHARACTERISTICS
PARAMETER
Boost Schottky Diode Voltage Drop
Boost Schottky Diode Reverse Leakage
Minimum Boost Voltage (Note 8)
BOOST Pin Current
RUN/SS Pin Current
RUN/SS Input Voltage High
RUN/SS Input Voltage Low
PG Leakage Current
PG Sink Current
PG Threshold as % of V
FB
PG Threshold Hysteresis
SYNC Threshold Voltage
SYNC Input Frequency
Note 1:
Stresses beyond those listed under absolute maximum ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect the device
reliability and lifetime.
Note 2:
Positive currents flow into pins, negative currents flow out of pins.
Minimum and maximum values refer to absolute values.
Note 3:
Absolute maximum voltage at V
IN
and RUN/SS pins is 60V for
nonrepetitive 1 second transients, and 36V for continuous operation.
Note 4:
The LT3695E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3695I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3695H is guaranteed over the full –40°C to
150°C operating junction temperature range.
V
PG
= 5V
V
PG
= 0.4V
Measured at FB Pin (Pin Voltage Rising)
Measured at FB Pin
300
0.3
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
RUN/SS
= 10V, unless otherwise noted. (Note 4)
CONDITIONS
I
BSD
= 50mA
V
SW
= 10V, V
BD
= 0V
l
MIN
TYP
720
0.1
1.7
10.5
4.5
12
MAX
900
1
2.3
17.5
7.5
20
0.2
UNITS
mV
μA
V
mA
μA
μA
V
V
μA
μA
%
mV
mV
MHz
I
SW
= 0.5A
V
RUN/SS
= 2.5V
V
RUN/SS
= 10V
l
2.5
0.1
100
88
1000
90
12
550
800
2.2
92
1
Note 5:
This IC includes overtemperature protection that is intended to
protect the devices during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specified maximum operating junction temperature may impair device
reliability.
Note 6:
This is the voltage necessary to keep the internal bias circuitry in
regulation.
Note 7:
Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at higher duty cycles.
Note 8:
This is the minimum voltage across the boost capacitor needed to
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