IC AS3607
LEDs Magazine
The AS3607 features a level ofstart-up sequence programmability not found in competing devices.This PMIC is suitable for portable navigation devices, portablemedia players, electronic dictionaries, GPS devices, handheldcomputers and a variety of battery-powered handheld devices useARM-based processors.
Processor and memory power supply must follow precisestart-up sequences otherwise they can be seriously damaged.Therefore, it is essential that the voltage are switched on and offin the correct order.
With its software programmable start-up sequences, the AS3607is bringing flexibility to the market that is new for midrangePMICs. Other competitors offer PMICs with fixed start-up sequencesthat are selected with external resistors.
The output voltage and the timing of all regulators of theAS3607 are programmed via software. As the software and demoboards, the OTP memory of the AS3607 can easily be programmedenabling fast prototype runs for quick marketintroduction. The slope of the ramp can be set to step-downconverter.
In portable systems, to maximize battery life and reduce boardspace, is essential. The AS3607 power management IC with over adiscrete solution space, a significant benefit, because itintegrates all of the voltage regulator, battery charger, backlightdrive and monitor the functions of the 6x6-mm QFN package.
Fully programmable AS3607 power management unit includes:three DC - DC step-down converter, and five low-noise LDO voltageregulator RF applications, LED backlight drivers, 2 programmablecurrent absorption and powerful lithium-ion battery charger. Threestep-down converter deliver 700 mA each with an efficiency of up to95%, significantly extending battery life.
The AS3607 includes lithium-ion constant current, constantcharge current of 1 amp maximum voltage battery charger, enablingfast charging of large batteries.