Quectel MC60 - Power Supply Circuits; LDO Application Details; DC-DC Converter Application

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Quectel Wireless Solutions
PROJECT
SIZE
TITLE
VER
62
A
DATE
2016/5/30
Reference DesignMC60
A2
LDO Application
DC-DC Application
The voltage converter should provide a minimum current of 2.0A.
It is used when the DC input voltage is below 7V.
1. It can be used when the input voltage is above 7V in vehicle application.
eg. DC12V IN
DCDC
DC 5V OUT
LDO
DC 4V OUT FOR
2. Use DCDC to convert high input voltage to 5V and LDO will generate
4V & 3.3V typical voltage for the module.
DC input
Power Supply
NOTE
LDO
DC 3.3V OUT FOR
GSM PART
GNSS PART
+
C201
470uF
+
C203
470uF
R202
124K
R204
56K
C202
100nF
C204
100nF
R201
51K
Q201
DTC143ZETL
R203
470R
1
EN
2
IN
3
GND
4
OUT
5
ADJ
U201
MIC29302/SPX29302
1
VIN
2
GND
3
EN
5
VOUT
4
FB
U202
SGM2019-ADJYN5G/TR
+
C205
100uF
C208
100nF
C206
100nF
C207
4.7uF
R205
75K
R206
47K
R207
47K
VBAT
+5V
[5]
POWER_ON/OFF
VCC_3V3
[1]
GNSS_VCC_EN
Quectel
Preliminary