RT8025 Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT8025 Datasheet PDF : 13 Pages
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RT8025
Typical Application Circuit
VIN
2.5V to 5.5V
CIN
4.7µF
1 VIN
L
4.7µH
LX 5
RT8025
3 EN VOUT 4
GND
2
Figure 1. Fixed Voltage Regulator
VOUT
COUT
10µF
VIN
2.5V to 5.5V
L
1 VIN
4.7µH
LX 5
CIN
4.7µF
RT8025
C1
R1
3 EN
FB 4
GND
2
R2
VOUT
COUT
10µF
Figure 2. Adjustable Voltage Regulator
VOUT = VREF x ⎜⎛1+ R1 ⎟⎞
⎝ R2 ⎠
with R1+ R2 ≤ 1MΩ and
VREF(Typ.) = 0.5V
Layout Guide
VIN
L
VOUT
VIN
L
VOUT
VIN 1
CIN
GND 2
5 LX
COUT
GND
EN 3 4 VOUT
VIN 1
CIN
GND 2
EN 3
5 LX
COUT
GND
R2
4 FB
R1
VOUT
C1
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 RT8025.
www.richtek.com
2
DS8025-02 March 2011
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