Datasheet

LTC4090/LTC4090-5
7
4090fc
TEMPERATURE (°C)
–50
HVOUT THRESHOLD VOLTAGE (V)
2.80
2.85
2.90
25 75 150
4090 G21
2.75
2.70
2.65
–25 0
50
100 125
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT(A)
40
4090 G16
2.5
20 60
1.5
1.0
4.0
3.5
3.0
2.0
80 100
HVEN PIN VOLTAGE (V)
0
SWITCH CURRENT LIMIT (A)
3.5
1.5
4090 G15
2.0
1.0
0.5 1 2
0.5
0
4.0
3.0
2.5
1.5
2.5 3 3.5
TEMPERATURE (°C)
–50
500
FREQUENCY (kHz)
600
700
800
900
050
100
150
4090 G13
1000
1100
–25 25
75
125
HVOUT (V)
0
0
SWITCHING FREQUENCY (kHz)
100
300
400
500
1000
700
1
2
4090 G14
200
800
900
600
3
4
BOOST DIODE CURRENT (A)
0
BOOST DIODE V
f
(V)
0.8
1.0
1.2
2.0
4090 G19
0.6
0.4
0
0.5 1.0 1.5
0.2
1.4
LOAD CURRENT (mA)
1
5.0
HVIN (V)
6.0
7.0
10 100 1000
4090 G18
4.0
4.5
5.5
6.5
3.5
3.0
TO START
TO RUN
TEMPERATURE (°C)
V
C
VOLTAGE (V)
1.50
2.00
2.50
4090 G20
1.00
0.50
0
CURRENT LIMIT CLAMP
SWITCHING THRESHOLD
–50 25–25 0 50 75 100 150125
TYPICAL PERFORMANCE CHARACTERISTICS
High Voltage Regulator Switch
Frequency
High Voltage Regulator
Frequency Foldback High Voltage Regulator Soft-Start
High Voltage Regulator Switch
Current Limit
High Voltage Regulator Minimum
Input Voltage
High Voltage Regulator Boost
Diode V
F
vs I
F
High Voltage Regulator
V
C
Voltages
High Voltage Regulator Power
Good Threshold
TEMPERATURE (°C)
SWITCH CURRENT LIMIT (A)
2.0
2.5
3.5
3.0
4090 G17
1.5
1.0
0
0.5
4.5
4.0
DUTY CYCLE = 10 %
DUTY CYCLE = 90 %
–50 25–25 0 50 75 100 150125
High Voltage Regulator Switch
Current Limit