Datasheet

LT3489
3
3489f
TEMPERATURE (˚C)
–50
FEEDBACK VOLTAGE (V)
1.25
1.26
1.27
25 75
3489 G01
1.24
1.23
–25 0
50 100 125
1.22
1.21
TEMPERATURE (°C)
–50
1.6
OSCILLATOR FREQUENCY (MHz)
1.8
2.0
2.2
2.4
–25 0 25 50
3489 G02
75 100 125
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
1.5
2.0
2.5
25
75
3489 03
1.0
0.5
0
–25 0 50
3.0
3.5
4.0
100
SWITCH CURRENT (A)
1
0
V
CE(SAT)
(mV)
100
200
300
400
500
600
0.5 1.0 1.5 2.0
3489 G04
2.5
–50°C
25°C
125°C
TEMPERATURE (˚C)
–50
QUIESCENT CURRENT (mA)
3.0
3.5
4.0
25 75
3489 G05
2.5
2.0
–25 0
50 100 125
1.5
1.0
V
OUT
100mV/DIV
AC COUPLED
I
L
1A/DIV
V
SW
10V/DIV
200ns/DIVV
IN
= 3.3V
A
VDD
= 8V
I
LOAD
, A
VDD
= 400mA
V
ON
= 23V, 10mA
V
OFF
= –8V, 20mA
3489 G06
Feedback Pin Voltage Oscillator Frequency Current Limit
Switch V
CE(SAT)
Voltage Quiescent Current
Switching Waveform for
the Cover Page Circuit
TYPICAL PERFOR A CE CHARACTERISTICS
UW
T
A
= 25°C unless otherwise noted.