Datasheet

LT3690
8
3690fa
Typical perForMance characTerisTics
Switching Waveforms,
Burst Mode Operation
Switching Waveforms, Transition
from Burst Mode Operation to Full
Frequency
Switching Waveforms, Full
Frequency Continuous Operation
V
CCINT
vs V
IN
V
VCCINT
Current Limit V
CCINT
Pin Voltage
T
A
= 25°C, unless otherwise noted.
Switching Frequency
vs Temperature
Minimum Switch On-Time
vs Temperature
Soft-Start Pin Current
vs Temperature
–50 50 1000 7525–25 150125
TEMPERATURE (°C)
FREQUENCY (kHz)
650
570
550
590
610
630
3690 G26
R
T
= 32.4k
–50 50 1000 7525–25 150125
TEMPERATURE (°C)
MINIMUM SWITCH ON-TIME (ns)
240
200
40
0
80
120
160
3690 G27
–50 50 1000 7525–25 150125
TEMPERATURE (°C)
SOFT-START PIN CURRENT (µA)
–1.2
–1.4
–2.4
–2.8
–2.6
–2.2
–2.0
–1.8
–1.6
3690 G28
V
IN
PIN VOLTAGE (V)
0
V
CCINT
PIN VOLTAGE (V)
5
1
0
2
3
4
3 986 741 2 5
3690 G29
10
V
CCINT
PIN VOLTAGE (V)
0
V
CCINT
PIN CURRENT (mA)
0
–40
–50
–30
–20
–10
3 41 2
3690 G30
5
TEMPERATURE (°C)
–50
V
CCINT
PIN VOLTAGE (V)
5
1
0
2
3
4
–25 12510050 750 25
3690 G31
150
5µs/DIV
V
SW
5V/DIV
I
L
0.5A/DIV
V
OUT
10mV/DIV
3690 G32
V
IN
= 12V, I
LOAD
= 20mA
FRONT PAGE APPLICATION
1µs/DIV
V
SW
5V/DIV
I
L
0.5A/DIV
V
OUT
10mV/DIV
3690 G33
V
IN
= 12V, I
LOAD
= 200mA
FRONT PAGE APPLICATION
1µs/DIV
V
SW
5V/DIV
I
L
1A/DIV
V
OUT
10mV/DIV
3690 G34
V
IN
= 12V, I
LOAD
= 2A
FRONT PAGE APPLICATION