参数资料
型号: LTC1149CS-5#PBF
厂商: Linear Technology
文件页数: 16/20页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 16-SOIC
标准包装: 50
PWM 型: 电流模式
输出数: 1
频率 - 最大: 250kHz
占空比: 100%
电源电压: 最高 48V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 70°C
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
包装: 管件
LTC1149
LTC1149-3.3/LTC1149-5
TYPICAL APPLICATIO S
V IN
8V TO 20V
1N4148
1N4148
IRFR9024
+
100 μ F
35V
0.047 μ F
0.068 μ F
1
2
3
PGATE
V IN
V CC
CAP
SHDN2
R-GND
16
15
14
L*
68 μ H
R SENSE **
0.1 ?
+
V OUT
3.3V/1A
220 μ F
4
P-DRIVE
NGATE
13
IRFR024
1N5818
6.3V
AVX
5
6
V CC
C T
LTC1149-3.3
PGND
SGND
12
11
+
1 μ F
390pF
3300pF
7
8
I TH
SENSE –
SHDN1
SENSE +
10
9
0V = NORMAL
>2V = SHUTDOWN
1k
1000pF
1149 F10
*COILTRONICS CTX02-11932
**DALE WSC-1/2-0.1
Figure 10. High Efficiency 8V to 20V Input 3.3V/1A Output Regulator
V IN
8V TO 20V
1N4148
1N4148
IRF9Z34
+
220 μ F
35V
0.047 μ F
0.068 μ F
1
2
3
4
PGATE
V IN
V CC
PDRIVE
CAP
SHDN2
RGND
NGATE
16
15
14
13
IRFZ34
L*
33 μ H
1N5818
R SENSE **
0.033 ?
+
V OUT
3.3V/3A
220 μ F
6.3V × 2
AVX
5
6
V CC
C T
LTC1149-3.3
PGND
SGND
12
11
SENSE
+
3.3 μ F
470pF
3300pF
7
8
I TH
SENSE
SHDN1
+
10
9
SHUTDOWN
100 ?
1k
1000pF
100 ?
1149 F11
*COILTRONICS CTX33-4-KM
**KRL SL-1-C1-0R033J
Figure 11. High Efficiency 8V to 20V Input 3.3V/3A Output Regulator
16
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