AAT2550
AAT2550 is Total Power Solution manufactured by AAT.
Description
The AAT2550 is a fully integrated total power solution with two step-down converters plus a singlecell lithium-ion / polymer battery charger. The stepdown converter input voltage range spans 2.7V to 5.5V, making the AAT2550 ideal for systems powered by single-cell lithium-ion/polymer batteries. The battery charger is a plete constant current/ constant voltage linear charger. It offers an integrated pass device, reverse blocking protection, high current accuracy and voltage regulation, charge status, and charge termination. The charging current is programmable via external resistor from 100m A to 1A. In addition to these standard features
, the device offers over-voltage, over-current, and thermal protection.
Features
- System Power™
- - The two step-down converters are highly integrated, operating at a switching frequency of 1.4MHz, mini- mizing the size of external ponents while keep- ing switching losses low. Each converter has independent input, enable, and feedback pins. The output voltage ranges from 0.6V to VIN. Each converter .. is capable of delivering up to 600m A of load current. Applications The AAT2550 is available in a Pb-free, space-saving, thermally-enhanced QFN44-24 package and is rated over the -40°C to +85°C temperature range.
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- Two Step-Down Converters:
- 600m A Output Current per Converter
- VIN Range: 2.7V to 5.5V
- 1.4MHz Switching Frequency
- Low RDS(ON) 0.4Ω Integrated Power Switches
- Internal Soft Start
- 27µA Quiescent Current per Converter Highly Integrated Battery Charger:
- Programmable Charging Current from 100m A to 1A
- Pass Device
- Reverse Blocking Diodes
- Current Sensing Resistor
- Digital Thermal Regulation Short-Circuit, Over-Temperature, and Current Limit Protection QFN44-24 Package -40°C to +85°C Temperature Range
Cellular Telephones Digital Cameras Handheld Instruments MP3, Portable Music, and Portable Media Players PDAs and Handheld puters
Typical Application
Battery Pack...
