Linear Technology LT3956 Series Manual page 6

LT3956
Typical perForMance characTerisTics
Quiescent Current
vs Switching Frequency
12
10
8
6
4
2
0
0 400 600
200
SWITCHING FREQUENCY (kHz)
SW Pin Current Limit
vs Duty Cycle
4.5
4.0
3.5
3.0
2.5
0 25 50
DUTY CYCLE (%)
ISP/ISN Input Bias Current
vs CTRL Voltage
80
60
40
20
0
0 0.5 1
CTRL (V)

INTV Current Limit
CC
vs Temperature
20
NOT SWITCHING
18
16
14
12
10
800 1000 –50 –25
3956 G13
LED Current Sense Threshold
vs FB Voltage
312.5
V = 2V
CTRL
250.0
187.5
125.0
62.50
0
75 100 1.2 1.22
3956 G16
Switch On-Resistance
vs Temperature
180
160
ISP
140
120
100
80
60
ISN
40
20
0
–50 –25
1.5 2
3956 G19
T = 25°C, unless otherwise noted.
A
25 50 125
0 75 100
TEMPERATURE (°C)
3956 G14
1.24 1.26 1.28
FB VOLTAGE (V)
3956 G17
0 25 50 75 100 125
TEMPERATURE (°C)
3956 G20
INTV Voltage vs Temperature
CC
7.4
7.3
7.2
7.1
7.0
–50 0 25 50
–25
TEMPERATURE (°C)
INTV Dropout Voltage
CC
vs INTV Current
CC
0
–0.5
–1.0
–1.5
–2.0
–2.5
0 6 9
3
LDO CURRENT (mA)
PWMOUT Waveform
C = 2.2nF
PWMOUT
PWM
INPUT
PWMOUT
5V/DIV
200ns/DIV
75 100 125
3956 G15
–40°C
25°C
125°C
12 15
3956 G18
3956 G21
3956f