Specifications
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.2 RF Antenna Interface
- 2.3 GNSS Antenna Interface
- 2.4 Sample Application
- 3 Operating Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
®
PLSx3 Hardware Interface Description
3.4 Power Supply
89
t PLSx3_HID_v01.002d 2021-08-24
Public / Released
Page 78 of 129
3.4 Power Supply
PLSx3 needs to be connected to a power supply at the SMT application interface - 4 lines
BATT+, and GND. There are two separate voltage domains for BATT+:
•BATT+
BB
with two lines for the general power management.
•BATT+
RF
with two lines for the RF.
Please note that throughout the document BATT+ refers to both voltage domains and power
supply lines - BATT+
BB
and BATT+
RF
.
The main power supply from an external application has to be a single voltage source and has
to be expanded to sub paths (star structure). BATT+
RF
must be decoupled by application with
low ESR capacitors(
≥ 2x100μF MLCC X5R@BATT+
RF
) as close as possible to LGA pads. Fig-
ure 32 shows a sample circuit for decoupling capacitors for BATT+.
Figure 32: Decoupling capacitor(s) for BATT+
The power supply of PLSx3 must be able to provide the peak current during the uplink trans-
mission.
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
DC-DC step down switching regulators.
• Switches the module's power voltages for the power-up and -down procedures.
• SIM switch to provide SIM power supply.
BATT+
2
2
Decoupling capacitors
e.g. 100μF MLCC X5R
GND
BATT+
BB
BATT+
RF
Module
SMT interface
2x