VBAT
D
5.1
3.6.3. Re
The power d
the power s
voltage drop
supply pow
output (VBA
The followin
power supp
DC_IN
470uF
E
C1
100uF
+
1
1V
eference D
design for th
source. The
p between t
er for modu
AT), a buck c
ng figure sh
ply is about 3
100nF
EC25-A_Us
C2
100nF
33
Figure
Design for
he module is
e power sup
the input an
ule. If there
converter is
ows a refere
3.8V and the
51K
4.7
VBAT_EN
Figure
ser_ManualC
1
C3
3pF
C4
10pF
e 8: Star St
r Power Su
s very impor
pply is capa
nd output is
is a big volt
preferred to
ence design
e maximum
MIC
IN
EN
2
1
K
47K
e 9: Referen
Confidentia
10
+
C5
100uF
ructure of t
upply
rtant, asthe
ble of provi
not too high
tage differen
o be used as
n for +5V inp
load current
C29302WU
OU
GN
D
A
D
J
3
5
nce Circuit
al / Release
C6
00nF
C7
33pF
the Power S
performanc
ding sufficie
h, it is sugge
nce betwee
s a power su
put power s
t is 3A.
UT
A
D
J
4
100K
47K
1%
1%
of Power S
d 27 / 6
VB
VB
C8
10pF
Supply
e of the mod
ent current u
ested that y
n the input
upply.
source. The
470R
Supply
L
EC25-AU
69
Modu
BAT_RF
BAT_BB
dule largely
up to 2A at
you shouldus
source and
designed o
470uF
LTE Module
ser Manua
ule
depends on
least. If the
se a LDO to
the desired
utput for the
VBAT
100nF
e
al
n
e
o
d
e
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