1.1.1 Power Supply Decoupling
(Ask a Question)To reduce any potential fluctuation on the power supply lines, decoupling capacitors, bypass capacitors, and other power supply filtering techniques must be used.
- For values ranging from 1 nF to 100 μF, use X7R or X5R (dielectric material) type capacitors.
- For values ranging from 100 μF to 1000 μF, use tantalum capacitors.
The following table lists the recommended number of PCB decoupling capacitors for an M2S050T/M2GL050T-FG896 device.
| Pin Name | Number of Pins | Ceramic Caps | Tantalum Caps | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
0.01 μF |
0.1 μF |
10 μF |
33 μF |
22 μF |
47 μF |
100 μF |
220 μF1 |
330 μF | ||
|
VDD |
24 |
12 |
12 | — |
— | — | — |
1 |
3 |
1 |
|
VDD10 |
29 |
14 |
14 | — | — | — |
2 | — | — | — |
|
VDDI1 |
4 |
2 |
2 |
1 | — | — | — | — | — | — |
|
VDDI2 |
4 |
2 |
2 |
1 | — | — | — | — | — | — |
|
VDDI3 |
5 |
2 |
3 |
1 | — | — | — | — | — | — |
|
VDDI4 |
3 |
2 |
1 |
1 | — | — | — | — | — | — |
|
VDDI5 |
29 |
14 |
14 | — | — | — |
2 | — | — | — |
|
VDDI6 |
1 |
1 | — |
1 | — | — | — | — | — | — |
|
VDDI7 |
6 |
3 |
3 |
1 | — | — | — | — | — | — |
|
VDDI8 |
5 |
2 |
3 |
1 | — | — | — | — | — | — |
|
VDDI9 |
1 |
1 |
1 | — | — | — | — | — | — | — |
|
VPP |
4 |
2 |
2 |
1 | — | — | — | — | — | — |
|
VREF0 |
3 |
2 |
1 |
1 | — | — | — | — | — | — |
|
VREF5 |
3 |
2 |
1 |
1 | — | — | — | — | — | — |
|
VPPNVM |
1 |
1 | — |
1 | — | — | — | — | — | — |
|
SERDES_0_VDD |
2 |
1 |
1 |
12 | — | — | — | — | — | — |
|
SERDES_1_VDD |
2 |
1 |
1 |
12 | — | — | — | — | — | — |
|
SERDES_0_L01_VDDAIO |
1 |
12 |
12 |
13 | — | — | — | — | — | — |
|
SERDES_0_L23_VDDAIO |
1 |
12 |
12 |
13 | — | — | — | — | — | — |
|
SERDES_1_L01_VDDAIO |
1 |
12 |
12 |
13 | — | — | — | — | — | — |
|
SERDES_1_L23_VDDAIO |
1 |
12 |
12 |
13 | — | — | — | — | — | — |
|
CCC_NE0_PLL_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
CCC_NE1_PLL_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
CCC_NW0_PLL_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
CCC_NW1_PLL_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
CCC_SW0_PLL_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
CCC_SW1_PLL_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
MSS_FDDR_PLL_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
MSS_PLL_MDDR_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
PLL_SERDES_0_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
PLL_SERDES_1_VDDA |
1 | — |
1 | — | — |
1 | — | — | — | — |
|
SERDES_0_L01_VDDAPLL |
1 | — |
1 | — |
1 | — | — | — | — | — |
|
SERDES_0_L23_VDDAPLL |
1 | — |
1 | — |
1 | — | — | — | — | — |
|
SERDES_1_L01_VDDAPLL |
1 | — |
1 | — |
1 | — | — | — | — | — |
|
SERDES_1_L23_VDDAPLL |
1 | — |
1 | — |
1 | — | — | — | — | — |
- 220 μF is used to limit surge current for the VDD supply.
- Single ceramic decoupling capacitor is required for both the pins at the device.
- Single ceramic decoupling capacitor is required for four pins at the device.
The following table lists the recommended decoupling capacitors for the SmartFusion2/IGLOO2 devices. For placement and routing details, see Layout Guidelines for SmartFusion2- and IGLOO2-Based Board Design.
| Part Number | Manufacturer | Description |
|---|---|---|
|
GRM155R71C103KA01D |
Murata |
Ceramic 0.01 μF, 16V, 10%, X7R, 0402 |
|
GRM155R71C104KA88D |
Murata |
Ceramic 0.1 μF, 16V, 10%, X7R, 0402 |
|
GRM188R60J106ME47D |
Murata |
Ceramic 10 μF, 6.3V, X5R, 0603 |
|
T491B475M016AT |
KEMET |
Tantalum 4.7 μF, 16V, 20%, 1411 |
|
T491B226M016AT |
KEMET |
Tantalum 22 μF, 16V, 20%, 1411 |
|
T491B476M010AT |
KEMET |
Tantalum 47 μF, 10V, 20%SMD |
|
T520V107M010ATE050 |
KEMET |
Tantalum 100 μF, 10V, 20%, 2917 |
|
TPSD337K010R0050 |
AVX |
Tantalum 330 μF, 10V, 10%, 2917 |