8.2.2.3 Output Filter Design
The inductor and the output capacitor together provide a low-pass filter. To simplify the selection process, Table 4 outlines possible inductor and capacitor value combinations for most applications.
Table 4. Matrix of Output Capacitor and Inductor Combinations
| NOMINAL L [µH](2) |
NOMINAL COUT [µF](3) |
| 10 |
22 |
47 |
100 |
150 |
| 0.47 |
|
+(1) |
+ |
+ |
+ |
| 1 |
+ |
+ |
+ |
+ |
+ |
| 2.2 |
|
|
|
|
|
(1) Typical application configuration. Other '+' mark indicates recommended filter combinations.
(2) Inductor tolerance and current derating is anticipated. The effective inductance can vary by 20% and
–30%.
(3) Capacitance tolerance and bias voltage derating is anticipated. The effective capacitance can vary by 20% and –50%.