RT9264 ETC, RT9264 Datasheet - Page 5

• Manufacturer Part Number: RT9264
• Description: HIGH FREQUENCY HIGH EFFICIENCY STEP UP DC/DC CONVERTER
• Manufacturer: ETC

Application Note
Output Voltage Setting
Referring to application circuits Fig.1 to Fig.3, the
output voltage of the switching regulator (V
be set with Eq.1.
The LDO output voltage can be set with Eq.2.
DS9264-00 December 2001
V
V
OUT
OUT
2
1
=
=
1 (
1 (
+
+
R
R
R
R
2
1
4
3
)
)
×
×
. 1
First Layer
. 0
25
86
V
V
OUT1
) can
Eq.2
Eq.1
Preliminary
Layout Guide
• A full GND plane without gap break.
• V
• V
• Minimized FB/LFB node copper area and keep far
• Minimized parasitic capacitance connecting to LX
• The following diagram is an example of 2-layer
connection for C2 to Pin1 and Pin6.
close to L1 inductor, when VIN is not an idea
voltage source.
away from noise sources.
and EXT nodes, which may cause additional
switching loss.
board layout for application circuits Fig.1 and
Fig.2.
OUT1
IN
to GND noise bypass – Add a 100µF capacitor
RT9264
to GND noise bypass – Short and wide
Second Layer (Full GND Plane)
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RT9264
5