Datasheet

3
LT3439
sn3439 3439fs
Minimum Input Voltage
vs Temperature
Oscillator Frequency
vs Temperature
Supply Current vs Slew Resistor
Switch Voltage Drop
vs Switch Current
SHDN Pin Hysteresis Current
vs Temperature
Current Limit vs Temperature
Supply Current in Shutdown Mode
vs Temperature
SHDN Pin Voltage Threshold
vs Temperature
SYNC Pin Voltage Threshold
vs Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50
INPUT VOLTAGE (V)
2.500
2.550
2.600
125 150
3439 G01
2.450
2.400
2.300
–25
0
25 50 75 100
2.350
2.750
2.700
2.650
TEMPERATURE (°C)
–50
SUPPLY CURRENT (µA)
6
8
10
2.7V
5V
125 150
3439 G02
4
2
0
–25
0
25 50 75 100
16
14
12
17.5V
TEMPERATURE (°C)
–50
OSCILLATOR FREQUENCY (kHz)
95
100
105
125 150
3439 G03
90
85
80
–25
0
25 50 75 100
120
115
110
R
T
= 16.9k
C
T
= 680pF
SWITCH CURRENT (A)
0.1 0.2 0.3
0
SWITCH VOLTAGE (V)
0.1
0.3
0.4
0.5
0.7 0.8 0.9
0.9
3439 G04
0.2
0.4 0.5 0.6 1.0
0.6
0.7
0.8
25°C
85°C
125°C
SLEW RESISTOR (Ω)
0
0
SUPPLY CURRENT (mA)
5
15
20
25
10000
20000
3439 G05
10
30000
40000
T
A
= 25°C
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
1.6
1.8
2.0
25 75 150
3439 G07
1.4
1.2
1.0
0.8
–25 0
50
100 125
TEMPERATURE (°C)
–50
THRESHOLD VOLTAGE (V)
1.30
1.31
1.32
125 150
3439 G08
1.29
1.28
1.27
–25
0
25 50 75 100
1.35
1.34
1.33
TEMPERATURE (°C)
–50
1.0
VOLTAGE THRESHOLD (V)
1.1
1.2
1.3
1.4
050
100
150
3439 G09
1.5
1.6
–25 25
75
125
TEMPERATURE (°C)
–50
SHDN PIN CURRENT (µA)
18
20
22
25
3439 G06
16
14
–25 0 15050 75 100 125
12
10
24