LT3468 Linear Technology, LT3468 Datasheet - Page 4

• Manufacturer Part Number: LT3468
• Description: Photoflash Capacitor Charger in ThinSOT
• Manufacturer: Linear Technology

10V/DIV
1A/DIV
LT3468/LT3468-1
LT3468-1 curves use the circuit of Figure 2 unless otherwise noted.
4
TYPICAL PERFOR A CE CHARACTERISTICS
V
I
0.700
0.660
0.620
0.580
0.540
0.500
PRI
SW
324
323
322
321
320
319
318
–40
2
LT3468-1 Switching Waveform
LT3468 Output Voltage
LT3468-1 Switch Current Limit
V
V
V
V
IN
OUT
IN
OUT
T
A
= 3.6V
–20
= 3V
= 100V
= 25 C
T
3
= 0V
A
= –40 C
0
TEMPERATURE ( C)
4
20
V
1 s/DIV
IN
5
(V)
T
40
A
= 85 C
6
60
W
7
80
3468 G09
3468 G12
3468 G15
U
100
8
10V/DIV
10V/DIV
1A/DIV
1A/DIV
V
I
V
I
PRI
PRI
SW
SW
324
323
322
321
320
319
318
2
LT3468-1 Output Voltage
LT3468 Switching Waveform
LT3468-1 Switching Waveform
V
V
IN
OUT
= 3.6V
= 100V
3
T
V
V
T
A
A
IN
OUT
T
= 85 C
A
= 25 C
= 3.6V
= –40 C
4
= 300V
V
1 s/DIV
1 s/DIV
IN
5
(V)
6
7
3468 G10
LT3468 curves use the circuit of Figure 1 and
3468 G13
3468 G16
8
10V/DIV
1A/DIV
V
I
PRI
SW
1.5
1.4
1.3
1.2
1.1
50
45
40
35
30
25
20
15
10
5
0
–40
LT3468 Switching Waveform
0
LT3468 Switch Current Limit
LT3468/LT3468-1 Switch
Breakdown Voltage
V
V
SW PIN IS RESISTIVE UNTIL BREAKDOWN
VOLTAGE DUE TO INTEGRATED
RESISTORS. THIS DOES NOT INCREASE
QUIESCENT CURRENT OF PART
IN
OUT
10 20 30 40 50 60 70 80 90 100
–20
= 3V
= 0V
V
V
IN
OUT
SWITCH VOLTAGE (V)
0
= 3.6V
TEMPERATURE ( C)
= 300V
20
T = –40 C
1 s/DIV
40
V
IN
T = 25 C
= V
60
CHARGE
T = 85 C
80
3468 G11
3468 G14
3468 G17
= 5V
34681i
100