參數(shù)資料
型號(hào): RT9264CS
廠商: Electronic Theatre Controls, Inc.
英文描述: HIGH FREQUENCY HIGH EFFICIENCY STEP UP DC/DC CONVERTER
中文描述: 高頻高效率升壓型DC / DC變換器
文件頁(yè)數(shù): 5/8頁(yè)
文件大小: 170K
代理商: RT9264CS
Preliminary
RT9264
DS9264-00 December 2001
www.richtek-ic.com.tw
5
Application Note
Output Voltage Setting
Referring to application circuits Fig.1 to Fig.3, the
output voltage of the switching regulator (V
OUT1
) can
be set with Eq.1.
The LDO output voltage can be set with Eq.2.
Layout Guide
A full GND plane without gap break.
V
OUT1
to GND noise bypass – Short and wide
connection for C2 to Pin1 and Pin6.
V
IN
to GND noise bypass – Add a 100
μ
F capacitor
close to L1 inductor, when VIN is not an idea
voltage source.
Minimized FB/LFB node copper area and keep far
away from noise sources.
Minimized parasitic capacitance connecting to LX
and EXT nodes, which may cause additional
switching loss.
The following diagram is an example of 2-layer
board layout for application circuits Fig.1 and
Fig.2.
First Layer
Second Layer (Full GND Plane)
RT9264
V
25
.
×
)
2
R
1
R
1
V
1
OUT
+
=
Eq.1
V
86
.
×
)
3
R
4
R
1
V
2
OUT
+
=
Eq.2
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