参数资料
型号: LT3508IUF#TRPBF
厂商: Linear Technology
文件页数: 16/26页
文件大小: 0K
描述: IC REG BUCK ADJ 1.4A DL 24QFN
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 0.8 V ~ 35.3 V
输入电压: 3.7 V ~ 36 V
PWM 型: 电流模式
频率 - 开关: 920kHz ~ 1.06MHz
电流 - 输出: 1.4A
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: 24-WFQFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 24-QFN 裸露焊盘(4x4)
LT3508
APPLICATIONS INFORMATION
Output Tracking and Sequencing
Complex output tracking and sequencing between channels
can be implemented using the LT3508’s TRACK/SS and
PG pins. Figure 8 shows several con?gurations for output
tracking and sequencing of 5V and 3.3V applications.
Independent soft-start for each channel is shown in Fig-
ure 8a. The output ramp time for each channel is set by the
soft-start capacitor as described in the soft-start section.
1V/DIV
Independent Start-Up
V OUT1
V OUT2
20ms/DIV
1V/DIV
Ratiometric Start-Up
20ms/DIV
V OUT1
V OUT2
1V/DIV
Coincident Start-Up
20ms/DIV
V OUT1
V OUT2
TRACK/SS1 V OUT1
5V
TRACK/SS1 V OUT1
5V
TRACK/SS1 V OUT1
5V
0.1μF
LT3508
0.22μF
LT3508
0.1μF
LT3508
TRACK/SS2 V OUT2
3.3V
TRACK/SS2 V OUT2
3.3V
TRACK/SS2 V OUT2
3.3V
0.047μF
R1
28.7k
R2
10.0k
(8a)
1V/DIV
Output Sequencing
20ms/DIV
V OUT1
V OUT2
(8b)
1V/DIV
Controlled Power Up and Down
V OUT1
V OUT2
EXTERNAL SOURCE
20ms/DIV
(8c)
TRACK/SS1 V OUT1
5V
TRACK/SS1 V OUT1
5V
0.1μF
LT3508
PG1
EXTERNAL
SOURCE
+
LT3508
TRACK/SS2 V OUT2
3.3V
TRACK/SS2 V OUT2
3.3V
0.047μF
R1
28.7k
R2
10.0k
(8d)
(8e)
Figure 8
3508fd
16
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