Gemalto M2M GmbH EHS8 사용자 설명서

®

Page 27 of 43

 

 

EHS8_HIO_v02.770 

2014-08-11

 

Confidential / Preliminary

 

Please note that throughout the document BATT+ refers to both voltage domains and power 

supply lines - BATT+

BB

 and BATT+

RF

. 

The power supply of EHS8 has to be a single voltage source at BATT+

BB

 and BATT+

RF

. It must 

be able to provide the peak current during the uplink transmission.  

All the key functions for supplying power to the device are handled by the power management 

section of the analog controller. This IC provides the following features: 

•  Stabilizes the supply voltages for the baseband using low drop linear voltage regulators 

and a DC-DC step down switching regulator. 

•  Switches the module's power voltages for the power-up and -down procedures. 
•  SIM switch to provide SIM power supply.