参数资料
型号: LT3505IMS8E#PBF
厂商: Linear Technology
文件页数: 6/24页
文件大小: 0K
描述: IC REG BUCK ADJ 1.2A 8MSOP
标准包装: 50
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0.78 V ~ 33.8 V
输入电压: 3.6 V ~ 36 V
PWM 型: 电流模式
频率 - 开关: 200kHz ~ 3.01MHz
电流 - 输出: 1.2A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)裸露焊盘
包装: 管件
供应商设备封装: 8-MSOP-EP
LT3505
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Current Limit
Switch Current Limit, R T = 75.0k
Typical Minimum On Time
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.8
1.7
1.6
1.5
1.4
1.3
T A = 25 ° C
160
140
120
100
80
60
40
20
1.0
–50
–25
0
25
50
75
100
125
1.2
0
10 20 30 40 50 60 70 80 90 100
0
–50
–25
0
25
50
75
100
125
TEMPERATURE ( ° C)
R T Pin Bias Voltage
DUTY CYCLE (%)
Switching Frequency
3505 G20
TEMPERATURE ( ° C)
Switching Frequency
505
V FB = 0.78V
3.0
T A = 2 5 ° C
T A = 25 ° C
500
2.5
495
2.0
1
1.5
490
1.0
485
0.5
480
–50
–25
0 25 50 75
TEMPERATURE( ° C)
100
125
0
0
5
10 15 20 25
R T PIN BIAS CURRENT ( μ A)
30
35
0.1
10
100
R T PIN RESISTANCE (k ? )
3505 G24
V SW
5V/DIV
I L
0.5A/DIV
0
V OUT
20mV/DIV
Operating Waveforms
V SW
5V/DIV
I L
0.5A/DIV
0
V OUT
20mV/DIV
Operating Waveforms,
Discontinuous Mode
V IN = 12V
V OUT = 3.3V
I OUT = 0.5A
L = 10 μ H
C OUT = 10 μ F
R T = 75.0k
1 μ s/DIV
3505 G18
V IN = 12V
V OUT = 3.3V
I OUT = 50mA
L = 10 μ H
C OUT = 10 μ F
R T = 75.0k
1 μ s/DIV
3505 F26
3505fc
6
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