LDO Regulator Application Note

How to Switch the ECO Function

There are four methods of switching the ECO Function and Ricoh offers four types of products utilizing each method.

[1] Manual Mode Shift Type The mode is switched by controlling an ECO pin.
The user can set the switching conditions but an extra CPU control pin is required.
[2] Automatic Mode Shift Type The ECO pin is eliminated and the regulator automatically switches between modes depending on system load.
A CPU I/O pin can be omitted but the user cannot set the switching conditions.
[3] Seamless Type Instead of switching between two modes, a smooth transition is made between modes.
[4] Manual/Automatic Mode Shift Type The mode is switched by controlling an AE pin.
When AE="H", the mode is set to the fast response mode, and when AE="L", the regulator operates like the Automatic Mode Shift Type.
This type has both advantage of the Manual Mode Shift Type and the Automatic Mode Shift Type.

How to Switch the ECO Function

Products with the ECO function
Manual Mode Shift Type
Automatic Mode Shift Type
Seamless Type
Manual/Automatic Mode Shift Type

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You can download application notes in PDF format.

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