Quectel MC60 Series User Manual

GSM/GPRS/GNSS Module Series
MC60 Series Hardware Design
MC60_Series_Hardware_Design Confidential / Released 33 / 114
LDO
RTC
Core
GSM Part
GNSS Part
Backup
Domain
VBAT
VRTC
MC60
Figure 11: Internal GNSS’s Backup Domain Power Construction
3.5.5.2. Use VRTC as Backup Power of GNSS
In either All-in-one or Stand-alone solution, when the main power supply (VBAT) is removed after the
module is turned off, and GNSS_VCC is also powered off, a backup supply such as a coin-cell battery
(rechargeable or non-chargeable) or a super capacitor can be used to power the VRTC pin to keep GNSS
in backup mode. In this case, the current consumption is as low as 14uA approximately.
When powered by VRTC, the reference schematic diagrams in All-in-one and Stand-alone solutions are
shown below.
Rechargeable
Backup Battery
Power Supply
LDO/DCDC
LDO
RTC
Core
GSM Part GNSS Part
Backup
Domain
VBAT
VRTC
MC60
SYSTEM_3.3V
Figure 12: VRTC is Powered by a Rechargeable Battery
Quectel
Confidential

Quectel MC60 Series Specifications

General

Brand	Quectel
Model	MC60 Series
Category	Control Unit
Language	English