RT8016
Typical Application Circuit
L
2.2µH
3
2
4
6
V
V
OUT
IN
VIN
RT8016
LX
2.5V to 5.5V
C
IN
4.7µF
EN
VOUT
C
OUT
10µF
GND
1, 5
Figure 1. Fixed Voltage Regulator
L
2.2µH
3
V
4
IN
V
VIN
RT8016
OUT
LX
2.5V to 5.5V
C
IN
C1
4.7µF
R1
R2
C
OUT
2
6
EN
FB
10µF
GND
1, 5
I
R2
R1
R2 ⎠
⎛
⎞
VOUT = VREF x 1+
⎜
⎟
⎝
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
RT8016_ADJ
RT8016_FIX
Output
GND
EN
FB
1
2
3
6
5
4
GND
1
2
3
6
5
4
VOUT
GND
LX
Output capacitor
must be near
RT8016
capacitor
must be near
RT8016
GND
LX
EN
L1
L1
VIN
VIN
R1
C
OUT
C
OUT
LX should be
connected to
C
R2
IN
C
IN
LX should be connected
to Inductor by wide and
short trace, keep
sensitive compontents
away from this trace
Inductor by wide
and short trace,
keep sensitive
compontents away
from this trace
C
must be placed
IN
C
must be placed
IN
between V and
GND as close as
possible
DD
between V and
GND as close as
possible
DD
Layout note:
1. The distance that CIN connects to VIN is as close as possible (Under 2mm).
2. COUT should be placed near RT8016.
Figure 3. LayoutGuide for RT8016
Copyright 2012 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS8016-04 February 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
