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RT8025 Datasheet(PDF) 2 Page - Richtek Technology Corporation

Part # RT8025
Description  1.25MHz, 400mA, High Efficiency PWM Step-Down DC/DC Converter
PDF  13 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8025 Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT8025
2
DS8025-02 March 2011
www.richtek.com
Typical Application Circuit
Figure 1. Fixed Voltage Regulator
Figure 2. Adjustable Voltage Regulator
0.5V
V
and
1M
R2
R1
with
R2
R1
1
x
V
V
REF(Typ.)
REF
OUT
=
Ω
≤
+
⎟
⎠
⎞
⎜
⎝
⎛ +
=
Layout Guide
Layout note:
1. The distance that CIN connects to VIN is as close as possible (Under 2mm).
2. COUT should be placed near RT8025.
Figure 3
VIN
GND
EN
LX
2
3
5
4
1
VOUT
V
IN
C
IN
V
OUT
L
GND
C
OUT
VIN
GND
EN
LX
2
3
5
4
1
FB
V
IN
C
IN
V
OUT
L
GND
V
OUT
C
OUT
R2
R1
C1
4.7µF
10µF
VIN
LX
GND
RT8025
EN
VOUT
4.7µH
2.5V to 5.5V
VIN
VOUT
CIN
L
4
5
1
3
2
COUT
4.7µF
10µF
VIN
LX
GND
RT8025
EN
FB
4.7µH
2.5V to 5.5V
VIN
VOUT
CIN
L
4
5
1
3
2
COUT
R1
R2
C1



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