Document Number: 002-14826 Rev. *G
Page 9 of 65
PRELIMINARY
CYW43903
Figure 3. Typical Power Topology (Page 1 of 2)
VBAT
1.35V
CYW43903 1.2V
REG_ON
Core Buck
Regulator
(CBUCK)
LPLDO1
CLDO
VDDIO
XTAL LDO
Cap-less
LNLDO
Cap-less
LNLDO
Cap-less
VCOLDO
Cap-less
LNLDO
Cap-less
LNLDO
1.2V
APPS Subcore
APPS SOCSRAM
APPS VDDM
WL VDDM (SRAMS in AOS)
WL Subcore
WL PHY
WLAN/CLB/Top, Always On
1.3V, 1.2V,
.095V (AVS)
WLRF RFPLL, PFD, and MMD
1.35V
WLRF XTAL
WLRF ADC REF
WLRF TX
WLRF AFE and TIA
WLRF LNA
WLRF LOGEN
WLRF TX Mixer and PA (not always)
1.2V
1.2V
1.2V
1.2V
1.2V
Mini‐PMU
(Inside WL Radio)
15 mA
VBAT
Operational:
2.3V to 4.8V
Performance:
3.0V to 4.8V
Absolute Maximum: 5.5V
VDDIO
Operational:
3.3V
Supply ball
Supply bump/pad
Ground ball
Ground bump/pad
External to chip
Power
switch
No power switch
No dedicated power switch, but internal power‐
down modes and block‐specific power switches
WLAN reset
ball
BBPLL
LNLDO
WL BBPLL/DFLL
1.2V