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DS2731 - Cache-Memory Battery-Backup Management

Description

The DS2731 is a complete power-management solution for modular backup applications.

It is well-suited for 2.5V and below memory bus voltages, with an input voltage of 12V.

The DS2731 includes an internal MOSFET switching power stage for charging a one-cell lithium chemistry battery.

Features

  • DS2731 Ordering Information PART DS2731E+ TEMP RANGE -20°C to +70°C.

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Full PDF Text Transcription

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Rev 1; 1/09 Cache-Memory Battery-Backup Management IC General Description The DS2731 is a complete power-management solution for modular backup applications. It is well-suited for 2.5V and below memory bus voltages, with an input voltage of 12V. The DS2731 includes an internal MOSFET switching power stage for charging a one-cell lithium chemistry battery. It has a fully integrated synchronous buck regulator capable of supplying up to 450mA of cache backup supply current, and the necessary logic and power devices for handling the switchover from system power to battery power. The battery charging method of the DS2731 is constant current/constant voltage (CCCV). Output voltage can be margined from 3.8V to 4.6V using a resistordivider.
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