LT3435 查看數據表（PDF） - Linear Technology
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LT3435
Linear Technology
LT3435 Datasheet PDF : 24 Pages
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LT3435
TYPICAL PERFOR A CE CHARACTERISTICS
Switch Peak Current Limit
6.0
5.5
5.0
4.5
4.0
3.5
3.0
–50 –25
–0 25 50 75
TEMPERATURE (°C)
100 125
3435 G10
Switch On Voltage (VCESAT)
500
450
400
TJ = 125°C
350
300
TJ = 25°C
250
200
150
TJ = –40°C
100
50
0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
3435 G13
Minimum On-Time for Continuous
Mode Operation
600
LOAD CURRENT = 1A
550
500
450
400
350
300
250
200
150
100
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3435 G17
Soft-Start Current Threshold
vs FB Voltage
50
TJ = 25°C
45
40
35
SOFT-START
30
DEFEATED
25
20
15
10
5
0
0 0.2 0.4 0.6 0.8 1.0 1.2
FB VOLTAGE (V)
3435 G11
Minimum Input Voltage
8.0
7.5
7.0
6.5 START-UP
6.0
VOUT = 5V
5.5
RUNNING
5.0
4.5
START-UP
4.0
3.5
RUNNING
VOUT = 3.3V
3.0
0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
3435 G15
Oscillator Frequency
vs FB Voltage
100
90
80
70
60
50
40
30
20
10
0
0
0.25 0.50 0.75 1.00 1.25
FB VOLTAGE (V)
3435 G12
Burst Mode Threshold vs Input
Voltage
1000
900
800
VOUT = 3.3V
L = 15µH
COUT = 100µF
TA = 25°C
BURST MODE EXIT
(INCREASING LOAD)
700
600
500
BURST MODE ENTER
400
(DECREASING LOAD)
300
200
100
0
5
10
15
20
INPUT VOLTAGE (V)
3435 G16
Maximum Synchronization
Frequency vs Temperature
1000
950
900
850
800
750
700
650
600
550
500
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3435 G14
Boost Current vs Switch Current
70
60
50
40
30
20
10
0
0 500 1000 1500 2000 2500 3000
SWITCH CURRENT (mA)
3435 G18
3435f
5
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