参数资料
型号: LT3502IMS#PBF
厂商: Linear Technology
文件页数: 16/24页
文件大小: 0K
描述: IC REG BUCK ADJ 0.5A 10MSOP
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: 0.8 V ~ 36 V
输入电压: 3 V ~ 40 V
PWM 型: 电流模式
频率 - 开关: 1.1MHz
电流 - 输出: 500mA
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: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
包装: 管件
供应商设备封装: 10-MSOP
LT3502/LT3502A
APPLICATIONS INFORMATION
V SW
10V/DIV
RUN
SHDN
GND
I L
500mA/DIV
3502 F07a
V OUT
2V/DIV
RUN
V IN = 12V
V OUT = 3.3V
L = 6.8μH
C OUT = 10μF
5μs/DIV
50k
SHDN
V SW
10V/DIV
0.1μF
GND
I L
500mA/DIV
3502 F07b
V OUT
2V/DIV
V IN = 12V
V OUT = 3.3V
L = 6.8μH
C OUT = 10μF
50μs/DIV
3502 F07
Figure 7. To Soft-Start the LT3502A, Add a Resistor and Capacitor to the SHDN Pin
D4
BD
V SW
10V/DIV
V IN
V IN
BOOST
SW
V OUT
LT3502A
I L
500mA/DIV
V IN = 40V
V OUT = 0V
L = 6.8μH
C OUT = 10μF
2μs/DIV
3502 F08a
SHDN
GND
DA
FB
+
3502 F08b
Figure 8a. The LT3502A Reduces its Frequency to Below 500kHz
to Protect Against Shorted Output with 40V Input
16
Figure 8b. Diode D4 Prevents a Shorted Input from Discharging
a Backup Battery Tied to the Output; it Also Protects the Circuit
from a Reversed Input. The LT3502/LT3502A Runs Only When
the Input is Present
3502fd
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