Datasheet

LT3514
6
3514fa
For more information www.linear.com/LT3514
FB Voltage vs RUN/SS Soft Start Current
Switching Frequency
vs Temperature
Switch Voltage Drop
Switch and Diode Current Limit,
Channel 3
Switch and Diode Current Limit
RUN/SS VOLTAGE (mV)
0
FB VOLTAGE (mV)
400
1200
3514 G16
0
400
200 600
1000
800
900
800
700
200
300
100
500
600
TEMPERATURE (°C)
–50
I
RUN/SS
(µA)
–1.8
–1.2
125
3514 G17
–2.0
0
–25 25
75
50 100
0
–0.6
–0.8
–0.2
–0.4
–1.6
–1.4
–1.0
SWITCH CURRENT (mA)
0
SWITCH VOLTAGE DROP (mV)
100
2000
3514 G19
0
500
1500
1000
700
600
500
400
200
300
CHANNELS 1, 4
CHANNEL 3
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
2.4
125
3514 G20
2.0
0
–25 25
75
50 100
4.0
3.8
2.8
2.2
2.6
3.2
3.6
3.0
3.4
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
1.2
125
3514 G21
1.0
0
–25 25
75
50 100
2.0
1.9
1.4
1.1
1.3
1.5
1.7
1.8
1.6
CHANNELS 1, 4
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
INPUT VOLTAGE (V)
0
INPUT QUIESCENT CURRENT (mA)
25
45
3514 G15
10
0
10
5 15
25
20 30
40
35
40
35
15
20
5
30
ALL SS = 2V
ALL SS = 0V
Input Quiescent Current vs Input
Voltage
TEMPERATURE (°C)
–50
FREQUENCY (MHz)
0.90
150
3514 G18
0.80
50
250–25 75
125
100
1.20
1.10
1.15
1.05
0.85
0.95
1.00
R
T
= 18.2k
Input Voltage Undervoltage
Lockout
V
IN
Pin Current
TEMPERATURE (°C)
–50
UVLO (V)
2.2
2.8
125
3514 G13
2.0
0
–25 25
75
50 100
3.6
3.4
3.2
2.4
2.6
3.0
V
EN/UVLO
(V)
0
I
VIN
(µA)
4
6
2.0
3514 G14
0
0.4
0.2 0.6
1.0
0.8 1.2
1.6
1.4
1.8
10
9
8
2
3
1
5
7