参数资料
型号: LT3505IMS8E#PBF
厂商: Linear Technology
文件页数: 15/24页
文件大小: 0K
描述: IC REG BUCK ADJ 1.2A 8MSOP
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: 0.78 V ~ 33.8 V
输入电压: 3.6 V ~ 36 V
PWM 型: 电流模式
频率 - 开关: 200kHz ~ 3.01MHz
电流 - 输出: 1.2A
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: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)裸露焊盘
包装: 管件
供应商设备封装: 8-MSOP-EP
LT3505
APPLICATIONS INFORMATION
V OUT
I LOAD
1A/DIV
32.4k
22pF
V C
FB
100k
10.0k
10 μ F
V OUT
20mV/DIV
AC COUPLED
22pF
10 μ s/DIV
3505 F05a
V OUT
I LOAD
1A/DIV
32.4k
44pF
V C
FB
100k
10.0k
10 μ F
× 2
V OUT
20mV/DIV
AC COUPLED
22pF
10 μ s/DIV
3505 F05b
V OUT
I LOAD
1A/DIV
V C
32.4k
FB
10.0k
301k
22pF
66pF
+
120 μ F
KEMET
A700D127M006ATE015
V OUT
20mV/DIV
AC COUPLED
10 μ s/DIV
Figure 5. Transient Load Response of the LT3505 with Different Output Capacitors as the
Load Current is Stepped from 500mA to 1.2A. V IN = 12V, V OUT = 3.3V, L = 2μH, R T = 20.0k
3505 F05c
D2
D2
BOOST
LT3505
C3
BOOST
LT3505
C3
V IN
V IN
SW
V OUT
V IN
V IN
SW
V OUT
GND
GND
V BOOST – V SW ? V OUT
MAX V BOOST ? V IN + V OUT
3505 F06a
V BOOST – V SW ? V IN
MAX V BOOST ? 2V IN
3505 F06b
(6a)
Figure 6. Two Circuits for Generating the Boost Voltage
(6b)
3505fc
15
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