LTC4090(RevA) View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC4090 Datasheet PDF : 28 Pages
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LTC4090/LTC4090-5
TYPICAL PERFORMANCE CHARACTERISTICS
High Voltage Regulator Switch
Frequency
1100
1000
900
800
700
600
500
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
4090 G12
High Voltage Regulator Switch
Current Limit
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0
20
40
60
80
100
DUTY CYCLE (%)
4090 G15
High Voltage Regulator Boost
Diode VF vs IF
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0.5
1.0
1.5
2.0
BOOST DIODE CURRENT (A)
4090 G18
High Voltage Regulator
Frequency Foldback
1000
900
800
700
600
500
400
300
200
100
0
0
1
2
3
4
HVOUT (V)
4090 G13
High Voltage Regulator Switch
Current Limit
4.5
4.0
DUTY CYCLE = 10 %
3.5
3.0
2.5
DUTY CYCLE = 90 %
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
4090 G16
High Voltage Regulator VC
Voltages
2.50
2.00
CURRENT LIMIT CLAMP
1.50
1.00
SWITCHING THRESHOLD
0.50
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
4090 G19
High Voltage Regulator Soft-Start
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 0.5 1 1.5 2 2.5 3 3.5
RUN/SS PIN VOLTAGE (V)
4090 G14
High Voltage Regulator Minimum
Input Voltage
7.0
6.5
TO START
6.0
5.5
5.0
4.5
4.0
TO RUN
3.5
3.0
1
10
100
LOAD CURRENT (mA)
1000
4090 G17
High Voltage Regulator Power
Good Threshold
2.90
2.85
2.80
2.75
2.70
2.65
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
4090 G20
4090fa
7
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