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参数资料
| 型号： | LT1614IS8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC REG INV ADJ 0.5A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 -24V |
| 输入电压： | 0.8 V ~ 5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 600kHz |
| 电流 - 输出： | 500mA |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LT1614
OPERATIO
V OUT
100mV/DIV
AC COUPLED
V OUT
20mV/DIV
AC COUPLED
I LOAD
200mA
50mA
V SW
5V/DIV
500 μ s/DIV
1614 F08
500ns/DIV
1614 F09
V OUT
100mV/DIV
AC COUPLED
Figure 8. Load Step Response of LT1614
with 33 μ F Tantalum Output Capacitor
Figure 9. 33 μ F “B” Case Tantalum Capacitor Has ESR Resulting
in 40mV P-P Voltage Ripple at Output with 200mA Load
V OUT
10mV/DIV
AC COUPLED
I LOAD
200mA
50mA
V SW
5V/DIV
500 μ s/DIV
1614 F10
500ns/DIV
1614 F11
Figure 10. Replacing C3 with 22 μ F Ceramic Capacitor
Lowers Output Voltage Ripple. 1nF Phase-Lead Capacitor
in Parallel with R1 Lowers Transient Excursion
SHUTDOWN
C1
+
Figure 11. 22 μ F Ceramic Capacitor at
Output Reduces Output Ripple Voltage
1
8
V IN
R1
R2
R C
C C
2
3
7
6
L1
GND
C3
4
D1
C2
5
1614 F12
L2
V OUT
Figure 12. Suggested Component Placement. Note: Cut in Ground Copper at D1’s Cathode
9
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