User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 783 of 909 2019 Ambiq Micro, Inc.
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21.8 Buck Converter
Figure 95. External Components for SIMO Buck
Table 1151: BLE Buck Converter
Table 1150: SIMO Buck Converter
Symbol Parameter Test Conditions Min Typ Max Unit
L
SBUCK
Buck converter inductance (V
SIMO
)
2.2 µH
C
BUCK
Buck converter output capacitance (2) (V
DDC
,
V
DDF
)
2.2 µF
Symbol Parameter Test Conditions Min Typ Max Unit
L
BLEBUCK
Buck converter inductance (V
DDBH
)
1.0 µH
C
BLEBUCK
Buck converter output capacitance (V
DDBH
)
4.7 µF
C
DCDCREF
BLE ref voltage capacitance (V
VDCDCRF
)
1.0 µF
SIMO
BUCK
CORE
LDO
Internal Voltages
L
SBUCK
C
BUCK
SIMOBUCK_SW
VDDC
VSSP
SIMOBUCK
_SWSEL
VDDP
C
BUCK
VDDF
MEM
LDO
MEMLP
LDO
VDDF_LP
VDDC VDDF