Datasheet

LT3761
6
3761f
Typical perFormance characTerisTics
INTV
CC
Current Limit vs
vs Temperature
INTV
CC
Dropout Voltage
vs Current, Temperature
V
ISP-ISN
C/10 Threshold
vs Temperature
SENSE Current Limit Threshold
vs Temperature
EN/UVLO Hysteresis Current
vs Temperature
EN/UVLO Threshold
vs Temperature
T
A
= 25°C, unless otherwise noted.
PWM Signal Generator Duty Ratio
vs DIM/SS Current
PWM Signal Generator Frequency
vs Duty Ratio
3761 G10
SENSE THRESHOLD (mV)
TEMPERATURE (°C)
90
100
110
95
105
–50 0
50
75
–25
25
100
150125
3761 G11
EN/UVLO CURRENT (µA)
TEMPERATURE (°C)
1.8
2.0
2.6
2.4
2.8
2.2
–50 0 50 75–25 25 100 150125
3761 G12
EN/UVLO THRESHOLD (V)
TEMPERATURE (°C)
1.19
1.23
1.27
1.21
1.25
–50 0 50 75–25 25 100 150125
FALLING
RISING
3761 G13
INTV
CC
CURRENT LIMIT (mA)
TEMPERATURE (°C)
30
34
40
32
36
38
–50 0
50
75
–25
25
100
150125
LDO CURRENT (mA)
3761 G14
0 5 10 15 2520 30
–1.8
–1.2
–1.4
–1.6
–0.8
–0.4
–0.6
0
–1.0
–0.2
LDO DROPOUT (V)
T
A
= –45°C
V
IN
= 7V
T
A
= 130°C
T
A
= 25°C
PWMOUT Waveform
200ns/DIV
PWM
INPUT
PWMOUT
5V/DIV
3761 G18
C
PWMOUT
= 2.2nF
DIM/SS CURRENT (µA)
–10
PWMOUT DUTY RATIO (%)
100
60
20
80
40
0
20 4010 300
3761 G16
50
DUTY RATIO (%)
0
PWMOUT FREQUENCY (Hz)
340
280
320
300
260
6040 8020
3761 G17
100
C
PWM
= 47nF
3761 G15
V
ISP-ISN
(mV)
TEMPERATURE (°C)
10
15
30
25
35
20
–50 0 50 75–25 25 100 150125
ISP = 24V
ISN = 0V