Datasheet

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 2V
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