AS1363
Datasheet - D e t a i l e d D e s c r i p t i o n
Output Voltage Selection
The AS1363 is available in two versions
One version can only operate at one
fixed output voltage and the other version can operate with a preset output voltage or with user-adjustable output volt-
ages (1.2V to 5.3V).
!
For the fixed output voltage version connect a capacitor C
BYP
from pin BYP to V
OUT
to improve PSRR and Noise
performance
To use the factory preset output voltage of the user-adjustable output voltage version, connect pin SET to GND
For configurations using an output voltage other than the factory preset, a voltage-divider from OUT to SET to
GND is required, as shown in
A value for R
2
in the 25kΩ to 100kΩ range should be suf-
ficient. Calculate the value for R
1
as:
!
!
V
OUT
-
R
1
=
R
2
× ⎛
-------------------- – 1
⎞
⎝
V
SETBYP
⎠
Where:
V
OUT
is in a range from 1.2V to 5.3V.
V
SET/BYP
= 1.2V.
(EQ 1)
Figure 16. Fixed Output Voltage
V
IN
2.0V to 5.5V
C
IN
1µF
1
IN
6
OUT
R
POK
100k
Ω
C
OUT
2.2µF
V
OUT
1.2V to 5.0V
On
Off
3
EN
AS1363
2
POK
To Controller
C
BYP
10nF
4
GND
5
BYP
Figure 17. Adjustable Output using preset Output Voltage
V
IN
2.5V to 5.5V
C
IN
1µF
1
IN
6
OUT
R
POK
100k
Ω
V
OUT
2.5V
C
OUT
2.2µF
On
Off
3
EN
AS1363-AD
2
POK
To Controller
4
GND
5
SET
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