AS1363 datasheet(9/19 Pages) AMSCO

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AS1363

Datasheet - Detailed Descr i p ti on

8.2 Output Voltage Selection

The AS1363 is available in two versions (see Ordering Information on page 18). 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 voltages (1.2V to 5.3V).



For the fixed output voltage version connect a capacitor CBYP from pin BYP to VOUT to improve PSRR and Noise performance

(see Figure 16).



To use the factory preset output voltage of the user-adjustable output voltage version, connect pin SET to GND (see Figure 17).



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

(see Figure on page 1). A value for R2 in the 25k

 to 100k range should be sufficient. Calculate the value for R1 as:

(EQ 1)

Where:

VOUT is in a range from 1.2V to 5.3V.

VSET/BYP = 1.2V.

Figure 16. Fixed Output Voltage

Figure 17. Adjustable Output using preset Output Voltage

OUT

SETBYP

---------------------

–







AS1363

COUT

2.2µF

OUT

BYP

POK

RPOK

100k

CIN

1µF

VIN

2.0V to 5.5V

VOUT

1.2V to 5.0V

To Controller

GND

Off

CBYP

10nF

AS1363-AD

COUT

2.2µF

OUT

SET

POK

RPOK

100k

CIN

1µF

VIN

2.5V to 5.5V

VOUT

2.5V

To Controller

GND

Off

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