RT8010 データシートの表示（PDF） - Richtek Technology
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RT8010 Datasheet PDF : 15 Pages
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RT8010/A
Typical Application Circuit
VIN
2.5V to 5.5V
CIN
4.7uF
3 VIN
L
2.2uH
LX 4
RT8010/A
2 EN VOUT 6
1 NC
GND 5
VOUT
COUT
10uF
Figure 1. Fixed Voltage Regulator
VOUT
=
VREF
x ⎜⎝⎛1+
R1
R2
⎟⎠⎞
VIN
2.5V to 5.5V
L
3 VIN
2.2uH
LX 4
CIN
4.7uF
RT8010/A
C1
R1
2 EN
1 NC
FB 6
GND 5
IR2
R2
VOUT
COUT
10uF
with R2 = 300kΩ to 60kΩ so the IR2 = 2μA to 10μA,
and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection.
Figure 2. Adjustable Voltage Regulator
Layout Guide
RT8010/A_FIX
RT8010/A_ADJ
NC 1
EN 2
VIN 3
6 VOUT
5 GND
L1
4 LX
Output capacitor
must be near
RT8010
COUT
CIN
LX should be connected
CIN must be placed to Inductor by wide and
between VDD and short trace, keep
GND as closer as sensitive compontents
possible
away from this trace
NC 1
EN 2
VIN 3
6 FB
Output
capacitor
5 GND
must be near
L1
RT8010/A
4 LX
COUT
R1
LX should be
CIN
connected to
R2
Inductor by wide
CIN must be placed
between VDD and
GND as closer as
possible
and short trace,
keep sensitive
compontents away
from this trace
Figure 3
Layout note:
1. The distance that CIN connects to VIN is as close as possible (Under 2mm).
2. COUT should be placed near RT8010/A.
www.richtek.com
2
DS8010/A-02 March 2007
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