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参数资料
| 型号： | LT1931IS5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG INV 1A TSOT23-5 |
| 标准包装： | 2,500 |
| 类型： | 反相 |
| 输出数： | 1 |
| 输入电压： | 2.45 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-5 |
LT1931/LT1931A
TYPICAL APPLICATIO S
5V to –12V Inverting Converter
Efficiency
V IN
L1A
10 μ H
C2
1 μ F
L1B
10 μ H
100
95
5V
90
C1
4.7 μ F
V IN
SHDN
LT1931
GND
SW
NFB
R1
84.5k
R2
D1
V OUT
–12V
150mA
C3
10 μ F
85
80
75
70
65
10k
60
55
C1: TAIYO YUDEN X5R JMK212BJ475MG
1931 TA02
50
C2: TAIYO YUDEN X5R TMK316BJ105ML
0
25
50
75 100
125
150
C3: TAIYO YUDEN X5R EMK325BJ106MM
D1: ON SEMICONDUCTOR MBR0520
L1: SUMIDA CLS62-100
5V to – 5V Inverting Converter Using Uncoupled Inductors
LOAD CURRENT (mA)
1931 TA03
V IN
L1
10 μ H
C2
1 μ F
L2
10 μ H
5V
C1
4.7 μ F
V IN
SHDN
LT1931
GND
SW
NFB
R1
29.4k
R2
220pF
D1
V OUT
–5V
300mA
C3
22 μ F
10k
C1: TAIYO YUDEN X5R JMK212BJ475MG
C2: TAIYO YUDEN X5R LMK212BJ105MG
C3: TAIYO YUDEN X5R JMK212BJ226MM
D1: ON SEMICONDUCTOR MBR0520
L1, L2: MURATA LQH3C100K04
2.2MHz, 5V to – 5V Inverting Converter
1931 TA04
Efficiency
V IN
5V
L1
4.7 μ H
C2
1 μ F
L2
4.7 μ H
80
75
C1
4.7 μ F
V IN
SHDN
LT1931A
GND
SW
NFB
R1
28.7k
R2
C4
180pF
D1
V OUT
–5V
300mA
C3
4.7 μ F
70
65
60
10k
55
C1: TAIYO YUDEN X5R JMK212BJ475MG
C2: TAIYO YUDEN X5R LMK212BJ105MG
C3: TAIYO YUDEN X5R JMK212BJ475MG
D1: ON SEMICONDUCTOR MBR0520
1931 TA05a
50
0
50
100 150 200 250
LOAD CURRENT (mA)
300
350
L1, L2: MURATA LQH3C4R7M24
1931 TA05b
1931fa
9
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