LT3695 Series
6
3695fa
BOOST Pin Current
Feedback Voltage
Switching Frequency
Frequency Foldback: LT3695
Switch Current Limit
Switch Current Limit
(SYNC Pin Grounded)
Switch Voltage Drop
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT (A)
1.3
1.1
1.5
1.7
100
3695 G10
0.7
0.9
0.5
20
40
60
80
1.9
SYNC < 0.3V
SYNC > 0.8V
OR CLOCKED
SWITCH CURRENT (A)
0
VOL
TAGE DROP (mV)
300
1.25
3695 G12
100
200
0
0.25
0.50
0.75
1.00
400
SWITCH CURRENT (A)
0
BOOST PIN CURRENT (mA)
20
25
15
10
30
1.25
3695 G13
5
0
0.25
0.50
0.75
1.00
35
FB PIN VOLTAGE (mV)
0
FREQUENCY (kHz)
1000
900
3695 G17
800
600
400
200
0
100 200 300 400
600 700 800
500
1200
R
RT
= 29.4k
TEMPERATURE (°C)
–50
FEEDBACK VOL
TAGE (mV)
810
790
800
780
770
0
50
–25
25
100
3695 G14
150
75
125
TEMPERATURE (°C)
–50
FREQUENCY (MHz)
1.20
1.15
1.10
1.05
1.00
0.80
0.85
0.90
0.95
0
50
–25
25
100
3695 G16
150
75
125
R
T
= 29.4k
TEMPERATURE (°C)
–50
SWITCH CURRENT LIMIT (A)
1.9
1.7
1.5
1.3
1.1
0.5
0.7
0.9
0
50
–25
25
100
3695 G11
150
75
125
DC = 10%
DC = 90%
Output Voltage:
LT3695-3.3, LT3695-5
Frequency Foldback: LT3695-3.3
TEMPERATURE (°C)
–50
OUTPUT
V
O
LT
AGE (V)
OUTPUT
V
O
LT
AGE (V)
3.35
3.25
3.15
3.30
3.20
3.10
5.15
5.05
4.95
5.10
5.00
4.90
0
50
–25
25
100
3695 G15
150
75
125
LT3695-3.3
LT3695-5
FREQUENCY (kHz)
0
0.5
1.5
1
2
2.5
3695 G18
3
3.5
0
200
400
600
800
1000
1200
OUTPUT VOLTAGE (V)
R
RT
= 29.4k
