Datasheet
LTC4089-3
6
40893f
For more information www.linear.com/4089-3
TYPICAL PERFORMANCE CHARACTERISTICS
High Voltage Regulator
Maximum Load Current, L = 10µH
High Voltage Regulator
Maximum Load Current, L = 33µH
High Voltage Regulator
Switch Voltage Drop
High Voltage Regulator
Switch Frequency
High Voltage Regulator
Frequency Foldback
High Voltage Regulator
Soft-Start
High Voltage Switch Current Limit
High Voltage Regulator
Typical Minimum Input Voltage
T
A
= 25°C, unless otherwise specified.
V
IN
(V)
5
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
20 30
40893 G10
10 15
25 35
I
OUT
(A)
MINIMUM
TYPICAL
V
IN
(V)
5
1.8
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
20 30
40893 G11
10 15
25 35
I
OUT
(A)
MINIMUM
TYPICAL
SWITCH CURRENT (A)
0
V
CE(SW)
(mV)
150
450
500
550
0.4
0.8
1.0
40893 G12
50
350
250
100
400
0
300
200
0.2
0.6
1.4
1.2
1.6
1.8
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
TEMPERATURE (°C)
FREQUENCY (kHz)
720
760
800
125
40893 G13
680
640
700
740
780
660
620
600
–25–50
250
75 100 150
50
HVOUT (V)
0
SWITCHING FREQUENCY (kHz)
400
600
5
40893 G14
200
0
1
3
2
4
800
300
500
100
700
SHDN PIN VOLTAGE (V)
0
0
SWITCH CURRENT LIMIT (A)
0.2
0.6
0.8
1.0
2.0
1.4
0.50 1 1.25
40893 G15
0.4
1.6
1.8
1.2
0.25 0.75 1.50 1.75 2
DUTY CYCLE (%)
0
CURRENT LIMIT (A)
1.6
1.8
2.0
80
40893 G16
1.4
1.2
1.5
1.7
1.9
1.3
1.1
1.0
2010
4030
60 70 90
50
100
T
A
= –40°C
T
A
= –5°C
T
A
= 25°C
T
A
= 90°C
LOAD CURRENT (mA)
1
5.8
INPUT VOLTAGE (V)
6.0
6.2
6.4
6.6
10 100 1000
40893 G17
5.6
5.4
5.2
5.0
6.8
7.0
TO START
TO RUN