Linear Technology LT3956 Series, Manual, Page: 5 / 20

LT3956
3956f
Typical perForMance characTerisTics
FB Regulation Voltage (V
FB
)
vs Temperature V
REF
Voltage vs Temperature V
REF
Voltage vs V
IN
Switching Frequency vs R
T
Switching Frequency
vs Temperature
EN/UVLO Hysteresis Current
vs Temperature
T
A
= 25°C, unless otherwise noted.
R
T
(k)
SWITCHING FREQUENCY (kHz)
3956 G07
10000
1000
100
10
10 100
3956 G04
V
FB
(V)
TEMPERATURE (°C)
–50 0 50 75 –25 25 100 125
1.20
1.22
1.24
1.26
1.28
1.21
1.23
1.25
1.27
3956 G05
V
REF
(V)
TEMPERATURE (°C)
–50 0 50 75 –25 25 100 125
1.96
1.98
2.00
2.02
2.04
1.97
1.99
2.01
2.03
V
IN
(V)
1.96
V
REF
(V)
1.98
2.00
2.02
2.04
1.97
1.99
2.01
2.03
3956 G06
0 20 40 80 60
3956 G08
SWITCHING FREQUENCY (kHz)
TEMPERATURE (°C)
–50 0 50 75 –25 25 100 125
300
400
500
350
450
R
T
= 26.7k
3956 G09
TEMPERATURE (°C)
–50 0 50 75 –25 25 100 125
1.6
I
EN/UVLO
(µA)
2.0
2.4
1.8
2.2
Quiescent Current vs V
IN
SW Pin Current Limit
vs Temperature
EN/UVLO Threshold
vs Temperature
3956 G12
EN/UVLO VOLTAGE (V)
TEMPERATURE (°C)
1.18
1.22
1.28
1.20
1.24
1.26
EN/UVLO RISING
EN/UVLO FALLING
–50 0 50 75 –25 25 100 125
V
IN
(V)
0
V
IN
CURRENT (mA)
1.0
2.0
0.5
1.5
3956 G10
0 20 40 80 60
PWM = 0V
CURRENT LIMIT (A)
4.2
4.0
3.8
3.6
4.4
3956 G11
TEMPERATURE (°C)
–50 0 50 75
–25
25 100 125