Datasheet

LT3695 Series
7
3695fa
Minimum Switch On-Time
Soft-Start
TYPICAL PERFORMANCE CHARACTERISTICS
RUN/SS Pin Current
T
A
= 25°C, unless otherwise noted.
Boost Diode Forward Voltage
Error Amplifi er Output Current:
LT3695
RUN/SS PIN VOLTAGE (V)
0
RUN/SS PIN CURRENT (µA)
10
8
35 40
3695 G22
4
2
6
0
5
10 15 20 3025
12
FB PIN ERROR VOLTAGE (mV)
–200
V
C
PIN CURRENT (µA)
0
10
20
30
–10
40
50
200
3659 G24
–40
–30
–50
–20
–60
–100
0 100
60
LOAD CURRENT (mA)
1
INPUT VOLTAGE (V)
4.0
3.5
4.5
1000
3695 G27
2.5
3.0
2.0
10 100
5.0
V
OUT
= 3.3V
L = 10µH
f = 800kHz
RUN/SS PIN VOLTAGE (V)
0
SWITCH CURRENT LIMIT (A)
1.4
0.8
1.0
1.2
1.6
1.8
3.5
3695 G21
0.4
0.2
0.6
0
0.5
1.0 1.5 2.0 3.02.5
2.0
SYNC < 0.3V
BOOST DIODE CURRENT (A)
0
BOOST DIODE V
F
(V)
1.0
0.8
1.2
1
3695 G23
0.4
0.2
0.6
0
0.25
0.5 0.75
1.4
Minimum Input Voltage
TEMPERATURE (°C)
–50
MINIMUM SWITCH ON TIME (ns)
120
100
80
60
40
0
20
050–25 25 100
3695 G20
15075 125
I
OUT
= 1A
Error Amplifi er Output Current:
LT3695-3.3
Frequency Foldback: LT3695-5
FREQUENCY (kHz)
0
1
324
3695 G19
5
0
200
400
600
800
1000
1200
OUTPUT VOLTAGE (V)
R
RT
= 29.4k
0
10
20
30
–10
40
50
–40
–30
–50
–20
–60
60
V
C
PIN CURRENT (µA)
–750
–500
–250 0 250
3695 G25
500 750
OUTPUT ERROR VOLTAGE (mV)
0
10
20
30
–10
40
50
–40
–30
–50
–20
–60
60
V
C
PIN CURRENT (µA)
–900
–600
–300 0 300
3695 G26
600 900
OUTPUT ERROR VOLTAGE (mV)
Error Amplifi er Output Current:
LT3695-5