Datasheet
SGLS246A − JUNE 2004 − REVISED JUNE 2008
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
detailed description (continued)
output capacitor (C
O
)
Increasing the output capacitor’s size reduces the output ripple voltage. Decreasing its ESR reduces both output
resistance and ripple. Smaller capacitance values can be used with light loads if higher output ripple can be
tolerated. Use the following equation to calculate the peak-to-peak ripple.
V
O(ripple)
+
I
O
f
osc
C
o
) 2 I
O
ESR
CO
Table 1. Recommended Capacitor Values
DEVICE
V
I
[V]
I
O
[mA]
C
I
[µF]
C
(fly)
[µF]
C
O
[µF]
TPS60400 1.8…5.5 60 1 1 1
TPS60401 1.8…5.5 60 10 10 10
TPS60402 1.8…5.5 60 3.3 3.3 3.3
TPS60403 1.8…5.5 60 1 1 1
Table 2. Recommended Capacitors
MANUFACTURER PART NUMBER SIZE CAPACITANCE TYPE
Taiyo Yuden EMK212BJ474MG
LMK212BJ105KG
LMK212BJ225MG
EMK316BJ225KL
LMK316BJ475KL
JMK316BJ106KL
0805
0805
0805
1206
1206
1206
0.47 µF
1 µF
2.2 µF
2.2 µF
4.7 µF
10 µF
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
TDK C2012X5R1C105M
C2012X5R1A225M
C2012X5R1A335M
0805
0805
0805
1 µF
2.2 µF
3.3 µF
Ceramic
Ceramic
Ceramic
Table 3 contains a list of manufacturers of the recommended capacitors. Ceramic capacitors will provide the
lowest output voltage ripple because they typically have the lowest ESR-rating.
Table 3. Recommended Capacitor Manufacturers
MANUFACTURER CAPACITOR TYPE INTERNET
Taiyo Yuden X7R/X5R ceramic www.t-yuden.com
TDK X7R/X5R ceramic www.component.tdk.com
Vishay X7R/X5R ceramic www.vishay.com
Kemet X7R/X5R ceramic www.kemet.com