Dc-To-Dc Interface - Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual

V
DD
Main
+
Supply
–
V
DCDC

10.3.5 DC-to-DC Interface

The EFR32 devices feature a DC-DC buck converter which requires a single external inductor and a single external capacitor. The con-
verter takes the VREGVDD input voltage and converts it down to an output voltage between VREGVDD and 1.8 V with a peak efficien-
cy of approximately 90% in Low Noise (LN) mode and 85% in Low Power (LP) mode. Refer to the data sheet for full DC-DC specifica-
tions.
The DC-DC converter operates in either Low Noise (LN) or Low Power (LP) mode. LN mode is intended for higher current operation
(e.g., >= 10 mA), whereas LP mode is intended for very low current operation (e.g., < 10 mA).
In addition, the DC-DC converter supports an unregulated Bypass mode, in which the input voltage is directly shorted to the DC-DC
output.
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VREGVDD
VREGVDD
Bypass
Switch
OFF
DC-DC
Driver
VREGSW
VREGSW
DC-DC
VREGVSS
VREGVSS
DVDD
DVDD
1
Digital Digital
Logic LDO
DECOUPLE
DECOUPLE
Figure 10.5. DC-DC High RF Power Configuration
EMU - Energy Management Unit
AVDD
IOVDD
IOVDD
AVDD
FLASH
0
1
ANASW
Analog
Blocks
0
REGPWRSEL
RF
RF
Power
Analog
Amplifier
PAVDD
RFVDD
Reference Manual
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