User's Manual

Cinterion
®
ALS6A-E Hardware Interface Overview
3.2 Power Supply
25
 ALS6A-E_HIO_H_v01.270a 2015-03-10
Confidential / Released
Page 21 of 36
3.2 Power Supply
ALS6A-E 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+_RF with 2 lines for the RF power amplifier supply
• BATT+ with 2 lines for the general power management.
The main power supply from an external application has to be a single voltage source and has
to be expanded to two sub paths (star structure). The power supply of ALS6A-E must be able
to provide the peak current during the uplink transmission.
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 switching regulators and low drop lin-
ear voltage regulators.
• Switches the module's power voltages for the power-up and -down procedures.
• Delivers, across the VEXT line, a regulated voltage for an external application.
• LDO to provide SIM power supply.