Datasheet

LT3755/LT3755-1/LT3755-2
6
37551fd
Typical perForMance characTerisTics
INTV
CC
Voltage vs V
IN
INTV
CC
Current Limit
vs Temperature INTV
CC
Voltage vs Temperature
Quiescent Current vs V
IN
SENSE Current Limit Threshold
vs Temperature
SHDN/UVLO Threshold
vs Temperature
V
IN
(V)
0
V
IN
CURRENT (mA)
1.0
2.0
0.5
1.5
37551 G10
0 10 20 4030
PWM = 0V
37551 G11
SENSE THRESHOLD (mV)
TEMPERATURE (°C)
90
100
110
95
105
–50 0
50
75
–25
25
100
150125
37551 G12
SHDN/UVLO VOLTAGE (V)
TEMPERATURE (°C)
1.18
1.22
1.28
1.20
1.24
1.26
SHDN/UVLO RISING
SHDN/UVLO FALLING
–50 0
50
75
–25
25
100
150125
0 10 20 4030
V
IN
(V)
0
V
INTVCC
(V)
4
8
2
6
37551 G13
37551 G14
INTV
CC
CURRENT LIMIT (mA)
TEMPERATURE (°C)
30
34
40
32
36
38
–50 0
50
75
–25
25
100
150125
37551 G15
INTV
CC
(V)
TEMPERATURE (°C)
–50 0
50
75
–25
25
100
150125
7.0
7.2
7.4
7.1
7.3
T
A
= 25°C, unless otherwise noted.
SENSE Current Limit Threshold
vs Duty Cycle
V
(ISP-ISN)
Threshold vs FB Voltage
Gate Rise/Fall Time
vs Capacitance
DUTY CYCLE (%)
95
SENSE THRESHOLD (mV)
105
115
100
110
37551 G16
0 25 50 75 100
FB VOLTAGE (V)
37551 G17
1.2 1.22 1.24 1.26 1.28
0
50
125
25
75
100
V
(ISP – ISN)
THRESHOLD (mV)
V
CTRL
= 2V
CAPACITANCE (nF)
37551 G18
0 2 4 6 108
0
40
100
20
60
80
TIME (ns)
GATE RISE
TIME
GATE
FALL TIME
10% TO 90%