Specifications

Cinterion
®
EXS82-W Hardware Interface Overview
3.2 Power Supply
27
 EXS82-W_HIO_v00.038 2019-12-27
Public / Preliminary
Page 27 of 44
3.2 Power Supply
EXS82-W needs to be connected to a power supply at the SMT application interface - 2 lines
BATT+, and GND. There are two separate voltage domains for BATT+:
•BATT+
BB
with a line mainly for the baseband power supply.
•BATT+
RF
with a line for the GSM power amplifier supply. Please note that this line needs
only be connected for GSM (2G/3G) availability.
Please note that BATT+ in this document refers to both voltage domains and power supply
lines - BATT+
BB
and BATT+
RF
.
The power supply of EXS82-W has to be a single voltage source at BATT+
BB
and BATT+
RF
. It
should be of type PS1, according to IEC 62368-1, and must be able to provide the peak current
during the uplink transmission.
Suitable low ESR capacitors should be placed as close as possible to the BATT+ pads, e.g.,
X7R MLCC.
All key functions for supplying power to the device are handled by the power management IC.
It 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.