Typical application

STBB1XX

6/21

Doc ID 15474 Rev 5

4

Typical application

Figure 3.

Application circuit - adjustable output version

SW1

SW2

VIN

VINA

EN

MODE/SYN

GND

PGND

FB

VOUT

R1

R2

COUT

L

CIN

VOUT

VIN

STBB1PUR

SW1

SW2

VIN

VINA

EN

MODE/SYN

GND

PGND

FB

VOUT

R1

R2

COUT

L

CIN

VOUT

VIN

STBB1PUR

Figure 4.

Application circuit - fixed output version

SW1

SW2

VIN

VINA

EN

MODE/SYN

GND

PGND

FB

VOUT

COUT

L

CIN

VOUT

VIN

STBB1PUR33

SW1

SW2

VIN

VINA

EN

MODE/SYN

GND

PGND

FB

VOUT

COUT

L

CIN

VOUT

VIN

STBB1PUR33

Table 5.

Component

Manufacturer

Part number

Value

Size

CIN

Murata

GRM188R60J106ME47D

10 µF

0603

COUT

Murata

GRM188R60J106ME47D

10 µF

0603

L

TDK

VLCF4020T-2R2N1R7

2.2 µH

4 x 4 x 2 mm

R1

560 k

Ω (V

(2)

0402

R2

100 k

Ω

0402

1.

Above listed components refer to typical application. Operation of the STBB1 is not limited to the choice of these external

components.

2.

R1 and R2 are calculated according to the following formula:

R1 = R2 x (VOUT/VFB - 1)

Suggested value for R2 is 100 k

Ω. In order to reduce the quiescent current a maximum value of 500 kΩ is possible.