UM-B-114
DA14531 Development Kit Pro Hardware User Manual
User Manual
Revision 1.4
23-Apr-2020
21 of 82
© 2021 Dialog Semiconductor
4.2.5 Power Section
●
The DA14531 SoC in the DA14531 PRO-MB is supplied from the V
LDO
voltage rail generated
from U5, LDO.
●
V
LDO
can be set to four different voltage levels. This is arranged by J5 settings.
●
Generated power flows through the current sensing circuit to the DA14531 PRO-DB power
supply pins:
○
V1 is connected to V
BAT_LOW
○
V3 is connected to V
BAT_HIGH
●
By applying proper jumpers on header J4, users can enable buck, boost, or bypass mode of
operation for the DA14531 DCDC converter.
●
For power configuration settings, refer to section
VLDO
U5
U1
DA14531
BUCK
BOOST
Bypass
U2
LDO
1.1V
P
w
r
Sw
SW1
J2
VBAT_Hi
VBAT_Lo
R33
2.
2u
H
2.2u
10u
Set
SW1
for BUCK
Not
Mounted
V3
V1
NP
PRO-MB
376-18-B
PRO-DB
376-04-F
376-05-E
J1
-m
a
ti
n
g
c
o
n
n
e
c
to
r
o
n
P
C
B
C1
C2
L1
VBAT
Vin
Current
Sense
circuitry
J5
J4
VLDO
J9
Figure 16: Power Topology for DA14531 PRO-MB and PRO-DB
Figure 17: Power Circuit for DA14531 PRO-MB
