u-blox ANTARIS 4 User Manual


your position is our focus
4.2 Power Management
4.2.1 Connecting Power
TheANTARIS
®
4GPSReceiverbasicallyhastwopowersupplypins,VCCandVBAT.ForLEAmodulesthereisan
additional pad power supply pin VDDIO that defines the IO voltage levels. Figure 50 shows the internal
connectionsofthepowersupplynetwork.
ANTARIS4 BasebandChip
VCC
VBAT
VCC
LDO
VBAT
LDO
Voltage
Super visor
1.8 V to ATR062x core,
FLASH
1.8 V to ATR0621 RTC
and backup SRAM
Noise F
to RF section:
A and ATR0601
ilter
LN
VCC_RF
VDD18OUT

Figure 50: Power supply concept
4.2.1.1 VCC - Main Power
Main power supply is fed through the VCC pin. During operation, the current drawn by the ANTARIS
®
4 GPS
me orders of magnitude, especially, if low-power operation modes are enabled. It is
important that the system power supply circuitry is able to support the peak power (see datasheet for
specification) for  a short time. In order to dimension a battery capacity for certain application
 the sustained

seofVCCripplevoltageatthemodule.Itisalsoagoodideatoplacea 
In case  failure on pin VCC,real-time clockandbackup RAM aresuppliedthrough pinV_bat.This
enables the ANTARIS
®
4 GPS receiver to recover from power failure with either a Hotstart or a Warmstart
(dependingontheduration ofVCC outage)andtomaintain theconfigurationsettings.If noBackupBatteryis
connected,thereceiverperformsaColdstartatpowerup.
 Note Ifnobackupbatteryisavailableconnectthe
V_batpintoGND.
Receiver can vary by so
powerfigureshallbeused.
Note AGPSreceiverissensitivetoripplesonthepowersupplyvoltage.Themaxripplemustnotexceed50
mVpeaktopeak.Itisstronglyrecommendedtodesignalow-resistanceconnectionfromthevoltage
regulator to the VCC supply pin of
the module. Any resistive or inductive losses in this path may
resultinanundesiredincrea
largecapacitor,e.g.10µF,closetotheVCCpinofthemodule.
4.2.2 Backup Battery
 powerof a
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
  Page 61

u-blox ANTARIS 4 Specifications

General

Brand	u-blox
Model	ANTARIS 4
Category	GPS
Language	English