LT3645 查看數據表（PDF） - Linear Technology
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LT3645 Datasheet PDF : 24 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LT3645
Buck Power Switch Voltage Drop
400
350
300
250
200
150
100
50
0
0 50 100 150 200 250 300 350 400 450 500
SWITCH CURRENT (mA)
3645 G07
Buck Power Switch Current Limit
1000
950
900
850
800
750
700
650
600
–50
0
50
100
TEMPERATURE (°C)
150
3645 G08
Overvoltage Lockout
39.5
RISING
FALLING
39.0
38.5
38.0
37.5
37.0
36.5
–50
0
50
100
TEMPERATURE (°C)
150
3645 G10
Switching Frequency
800
790
780
770
760
750
740
730
720
710
700
–50
0
50
100
TEMPERATURE (°C)
150
3645 G11
Undervoltage Lockout
3.8
3.7
3.6
3.5
3.4
3.3
3.2
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
3645 G09
LDO Power Transistor Current
Limit
340
320
300
280
260
240
220
200
–50
0
50
100
TEMPERATURE (°C)
150
3645 G12
LDO Dropout Voltage to VCC2
350
300
250
200
150
100
50
OUT2 = 0.8V
OUT2 = 3.3V
0
0
50
100
150
200
LOAD CURRENT (mA)
3645 G13
LDO Dropout Voltage
350
300
250
200
150
100
50
0
–60 –40 –20 0 20 40 60 80 100 120 140 160
TEMPERATURE (°C)
3645 G14
LDO Load Regulation
0
–0.02
–0.04
–0.06
–0.08
–0.10
–0.12
–0.14
–0.16
0
50
100
150
OUTPUT CURRENT (mA)
200
3645 G15
3645f
5
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