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