Quectel LTE Standard Module Series - Page 10

A2
EG21-G Reference Design
2019/12/5
DATE
1.0
114
VER
TITLE
SIZE
PROJECT
Quectel Wireless Solutions
B
C
D
6543 21
D
C
B
A
SHEET
1
23
4
5
6
A
OF
DRAWN BY
CHECKED BY
Woody WU
Lorry XU
Power Supply Block Diagram
DC-DC
DC 5V OUT
e.g. DC 12V IN
DC 3.8V @2.0A
EG21-G
MIC29302WU
MOS ON/OFF
USB_VBUS
EN
VBAT_EN
SGM2019-ADJYN5G/TR
DC 3.3V
SGM2019-ADJYN5G/TR
DC 1.8V
CODEC_
EN
EN
VDD_EXT
MIC29302WU
EN
ALC5616
TLV320AIC3104
or
Codec
VBUS_CTRL
EN
POWER_EN
SD card
MOS ON/OFF
EN
DC 3.3V @0.8A
SD_PWR_EN
SGMII
DC 3.3V @0.8A
51K