参数资料
型号: LT3781IG#PBF
厂商: Linear Technology
文件页数: 5/20页
文件大小: 0K
描述: IC REG CTRLR ISO PWM CM 20-SSOP
标准包装: 66
PWM 型: 电流模式
输出数: 2
频率 - 最大: 700kHz
占空比: 100%
电源电压: 8 V ~ 72 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 20-SSOP(0.209",5.30mm 宽)
包装: 管件
LT3781
TYPICAL PERFOR A CE CHARACTERISTICS
I BST Boost Supply Current
vs Temperature
I CC Supply Current
vs SHDN Pin Voltage
UVLO I CC Supply Current
vs Temperature
5.2
60
T A = 25 ° C
1
5.1
40
0.8
5.0
20
4.9
0.6
4.8
–55 –40
0
40
80
125
0
0
0.2
0.4 0.6 0.8
1.0
1.2
0.5
–55 –40
0
40
80
125
5.10
5.05
5.00
4.95
TEMPERATURE ( ° C)
3781 G04
5V REF Voltage vs Temperature
60
50
40
SHDN PIN VOLTAGE (V)
3781 G05
5V REF Short-Circuit Current Limit
vs Temperature
1.260
1.255
1.250
1.245
TEMPERATURE ( ° C)
Error Amp Reference
vs Temperature
3781 G06
4.90
–55 –40
0
40
80
125
30
–55 –40
0
40
80
125
1.240
–55 –40
0
40
80
125
TEMPERATURE ( ° C)
3781 G07
V C Pin Short-Circuit Current Limit
vs Temperature
TEMPERATURE ( ° C)
Soft-Start Output Current
vs Temperature
3781 G08
TEMPERATURE ( ° C)
Soft-Start Output Current
vs Soft-Start Pin Voltage
3781 G09
25
12
V SS = 2V
60
T A = 25 ° C
11
20
15
10
9
40
20
10
–55 –40
0
40
80
125
8
–55 –40
0
40
80
125
0
0
100
200 300 400
500
TEMPERATURE ( ° C)
3781 G10
TEMPERATURE ( ° C)
3781 G11
SOFT-START PIN VOLTAGE (mV)
3781 G12
3781f
5
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