LT3695 Series
3
3695fa
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 10V, V
RUN/SS
= 10V, unless otherwise noted. (Note 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Operating Voltage (Note 6)
LT3695
V
BD
= 3.3V
V
BD
< 3V
l
l
3.4
3.4
3.6
4.3
V
V
LT3695-3.3 V
OUT1,2
= 3.3V
l
3.4
3.6
V
LT3695-5
V
OUT1,2
= 5V
l
3.4
3.6
V
V
IN
Overvoltage Lockout
l
36
38
39.9
V
Quiescent Current from V
IN
LT3695
V
RUN/SS
= 0.2V V
BD
= 3.3V
V
RUN/SS
= 10V, V
BD
= 3.3V, Not Switching
V
RUN/SS
= 10V, V
BD
= 0V, Not Switching
l
0.01
35
90
0.5
60
160
μA
μA
μA
LT3695-3.3 V
RUN/SS
= 10V, V
OUT1,2
= 3.3V, Not Switching
l
35
60
μA
LT3695-5
V
RUN/SS
= 10V, V
OUT1,2
= 5V, Not Switching
l
35
60
μA
Quiescent Current from BD Pin
LT3695
V
RUN/SS
= 0.2V, V
BD
= 3.3V
V
RUN/SS
= 10V, V
BD
= 3.3V, Not Switching
V
RUN/SS
= 10V, V
BD
= 0V, Not Switching
l
35
0.01
55
0
0.5
100
–5
μA
μA
μA
Quiescent Current from OUT1,2 Pins
LT3695-3.3 V
RUN/SS
= 0.2V
V
RUN/SS
= 10V, V
OUT1,2
= 3.3V, Not Switching
l
5
43
10
65
15
112
μA
μA
LT3695-5
V
RUN/SS
= 0.2V
V
RUN/SS
= 10V, V
OUT1,2
= 5V, Not Switching
l
5
43
10
65
15
112
μA
μA
Minimum BD Pin Voltage: LT3695
2.8
3
V
Feedback Voltage: LT3695
l
792
785
800
800
808
815
mV
mV
FB Pin Bias Current: LT3695
FB Pin Voltage = 800mV
l
–5
–40
nA
Reference Voltage Line Regulation
3.6V < V
IN
< 36V
0.001
0.005
%/V
Output Voltage
LT3695-3.3
l
3.27
3.25
3.3
3.3
3.33
3.35
V
V
LT3695-5
l
4.95
4.925
5
5
5.05
5.075
V
V
Error Amp g
m
I
VC
= ±1.5μA
430
μS
Error Amp Voltage Gain
1300
V/V
V
C
Source Current
50
μA
V
C
Sink Current
50
μA
V
C
Pin to Switch Current Gain
1.25
A/V
V
C
Switching Threshold
0.4
0.6
0.8
V
V
C
Clamp Voltage
2
V
Switching Frequency
R
RT
= 8.06k
R
RT
= 29.4k
R
RT
= 158k
1.98
0.9
225
2.2
1.0
250
2.42
1.1
275
MHz
MHz
kHz
Minimum Switch Off-Time
E- and I-Grades
H-Grade
l
l
130
130
210
250
ns
ns
Switch Current Limit (Note 7)
SYNC = 0V
SYNC = 3.3V or Clocked
1.45
1.18
1.7
1.4
2
1.66
A
A
