STW4141 STMicroelectronics, STW4141 Datasheet - Page 22

• Manufacturer Part Number: STW4141
• Description: Single Coil Dual Output Step Down Dc/dc Converter For Digital Base Band And Multimedia Processor Supply
• Manufacturer: STMicroelectronics

Application information
4.6.2
4.6.3
4.6.4
22/30
Input capacitor (CIN selection)
Input capacitor of 10 µF ceramic low ESR capacitor should be used to reduce switching
losses. It should be placed as close as possible to supply pins VDD and PVDD. The
connection traces should be wide and short to minimize impedance.
Output capacitors (COUT selection)
The selection of COUT is driven by the required ESR to minimize voltage ripple and load
step transients. There are two possibilities for output capacitors: either a 22 µF is connected
to ground or two 10 µF ceramic are used to reduce ESR and switching losses. The capacitor
should be placed as close as possible to V
and short to minimize impedance.
Capacitors selection
Table 9.
C
C
Component
IN
OUT1
, C
OUT2
Bill of Material: capacitor selection
MURATA
TAIYO YUDEN
TDK
MURATA
TAYIO YUDEN
TDK
Supplier
GRM188R60J106ME47D
GRM21BR60J106ME15L
JMK212BJ106MG-T
C1608X5R0J106MT
C2012X5R0J106MT
GRM188R60J106ME47D
GRM21BR60J106ME15L
GRM21BR60J226ME15L
JMK212BJ106MG-T
JMK212BJ226MG-T
C1608X5R0J106MT
C2012X5R0J106MT
C2012X5R0J226MT
Part number
OUTx
pins. The connection traces should be wide
2 x 10 µF, 6.3V
2 x 10 µF, 6.3V
2 x 10 µF, 6.3V
2 x 10 µF, 6.3V
2 x 10 µF, 6.3V
10 µF, 6.3V
10 µF, 6.3V
10 µF, 6.3V
10 µF, 6.3V
10 µF, 6.3V
22 µF, 6.3V
22 µF, 6.3V
22 µF, 6.3V
Value
Case size
2 x 0603
2 x 0805
2 x 0805
2 x 0603
2 x 0805
0603
0805
0805
0603
0805
0805
0805
0805
STw4141