SI5325C-C-GM Datasheet, PDF (106/178 Pages) Silicon Laboratories – ANY-FREQUENCY PRECISION CLOCKS

Si53xx-RM
8. Power Supply
These devices incorporate an on-chip voltage regulator to power the device from supply voltages of 1.8, 2.5, or
3.3 V. Internal core circuitry is driven from the output of this regulator while I/O circuitry uses the external supply
voltage directly.
Figure 57 shows a typical power supply bypass network for the TQFP packages. Figure 58 shows a typical power
supply bypass network for QFN.
In both cases, the center ground pad under the device must be electrically and thermally connected to the ground
plane.
System
Power
Supply
(1.8, 2.5 or
3.3 V)
Ferrite
Bead
0.1 uF
C₁ – C₈
1.0 uF
C₉
Ferrite bead is Venkel BC1206-471H
or equivalent.
V_DD
GND
TQFP
PKG
Figure 57. Typical Power Supply Bypass Network (TQFP Package)
System
Power
Supply
(1.8, 2.5, or
3.3 V)
Ferrite
Bead
0.1 uF
C₁ – C₃
1.0 uF
C₄
Ferrite bead is Venkel BC1206-471H
or equivalent.
V_DD
GND
QFN
PKG
Figure 58. Typical Power Supply Bypass Network (QFN Package)
106
Rev. 1.2