参数资料
型号: LT3083IDF#TRPBF
厂商: Linear Technology
文件页数: 8/28页
文件大小: 0K
描述: IC REG LDO ADJ 3A 12-DFN
标准包装: 2,500
稳压器拓扑结构: 正,可调式
输出电压: 可调至 23V
输入电压: 1.2 V ~ 23 V
电压 - 压降(标准): 1.25V @ 3A
稳压器数量: 1
电流 - 输出: 3A
电流 - 限制(最小): 3A
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 12-WFDFN 裸露焊盘
供应商设备封装: 12-DFN-EP(4x4)
包装: 带卷 (TR)
LT3083
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C, unless otherwise noted.
Ripple Rejection, Single Supply
Ripple Rejection, Dual Supply,
V CONTROL Pin
Ripple Rejection, Dual Supply,
IN Pin
100
90
I LOAD = 0.1A
120
105
120
105
I LOAD = 0.1A
80
70
60
I LOAD = 1.5A
90
75
I LOAD = 0.1A
90
75
I LOAD = 0.5A
50
40
I LOAD = 0.5A
60 I
45
LOAD = 1.5A
60
45
I LOAD = 1.5A
RIPPLE = 50mV P-P
V IN – V CONTROL = V OUT(NOMINAL) + 2V
30
C OUT = 10μF CERAMIC
20 C SET = 0.1μF CERAMIC
10
0
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
10M
30
15
0
C OUT = 10μF CERAMIC
C SET = 0.1μF
V IN = V OUT(NOMINAL) + 1V
V CONTROL = V OUT(NOMINAL) + 2V
10 100 1k 10k 100k
FREQUENCY (Hz)
1M
10M
30
15
0
C OUT = 10μF CERAMIC
C SET = 0.1μF
V IN = V OUT(NOMINAL) + 1V
V CONTROL = V OUT(NOMINAL) + 2V
10 100 1k 10k 100k
FREQUENCY (Hz)
1M
10M
80
79
78
77
76
75
74
3083 G25
Ripple Rejection (120Hz)
1000
100
3083 G26
Noise Spectral Density
100
10
3083 G27
RIPPLE = 500mV P-P , ? = 120Hz
I LOAD = 0.5A
C SET = 0.1μF, C OUT = 10μF
73
V IN = V CONTROL = V OUT(NOMINAL) + 2V
72
71
70
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
10
10
100
1k 10k
FREQUENCY (Hz)
1
100k
Output Voltage Noise
3083 G28
21
3083 G29
Error Amplifier Gain and Phase
36
18
15
12
9
PHASE
0
–36
–72
–108
V OUT
100μV/DIV
6
3
–144
–180
0
–3
–6
GAIN
–216
–252
–288
TIME 1ms/DIV
V OUT = 1V, R SET = 20k
C SET = 0.1μF, C OUT = 10μF
I LOAD = 3A
3083 G30
–9
–12
–15
10
I LOAD = 0.5A
I LOAD = 1.5A
I LOAD = 3A
100 1k 10k
FREQUENCY (Hz)
100k
–324
–360
–396
1M
3083 G31
3083fa
8
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