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LT3467ES6#TR 数据手册 - Linear Technology（凌力尔特）
制造商:
Linear Technology（凌力尔特）
分类:
DC/DC转换器
封装:
TSOT-23-6
描述:
开关稳压器 LT3467 - 1.1A Step-Up DC/DC Converter with Integrated Soft-Start
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P5Hot
典型应用电路图在P1P11P12P13P14P18
原理图在P5P6
封装尺寸在P15
焊盘布局在P16
技术参数、封装参数在P3
应用领域在P1P6P7P8P9P10P11P12P13P14P18
电气规格在P3P4
导航目录
LT3467ES6#TR数据手册
Page:
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若手册格式错乱，请下载阅览PDF原文件
LT3467/LT3467A
9
3467afe
APPLICATIONS INFORMATION
V
OUT
200mV/DIV
AC COUPLED
I
L1
5A/DIV
AC COUPLED
LOAD CURRENT
100mA/DIV
AC COUPLED
20μs/DIV
3467 F03
Figure 3. Transient Response of Figure 8’s Step-Up
Converter without Phase Lead Capacitor
V
OUT
200mV/DIV
AC COUPLED
I
L1
5A/DIV
AC COUPLED
LOAD CURRENT
100mA/DIV
AC COUPLED
20μs/DIV
3467 F04
Figure 4. Transient Response of Figure 8’s Step-Up
Converter with a 22pF Phase Lead Capacitor
Setting Output Voltage
To set the output voltage, select the values of R1 and R2
(see Figure 2) according to the following equation.
R1=R2
V
OUT
1.255V
–1
⎛
⎝
⎜
⎞
⎠
⎟
A good value for R2 is 13.3k which sets the current in the
resistor divider chain to 1.255V/13.3k = 94μA.
Layout Hints
The high speed operation of the LT3467/LT3467A demands
careful attention to board layout. You will not get adver-
tised performance with careless layout. Figure 5a shows
the recommended component placement for the ThinSOT
package. Figure 5b shows the recommended component
placement for the DFN package. Note the vias under the
Exposed Pad. These should connect to a local ground
plane for better thermal performance.
R2
R1
GND
C2
C3
L1
D1 C1
V
OUT
V
OUT
V
IN
SHDN
3467 F05a
FB
C
SS
SS
1
2
3
6
5
4
Figure 5a. Suggested Layout—ThinSOT
R2
R1
GND
C2
C1
L1
D1
V
OUT
V
OUT
3467 F05b
C3
FB
C
SS
V
IN
1
2
3
4
8
7
6
5
SHDN
Figure 5b. Suggested Layout—DFN
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