AN3223

READY pin

Doc ID 17553 Rev 2

19/29

7.3

Function of the READY pin in Torch mode (optimized)

The threshold for the transition from high to low level is 4.2 V in this case. It is a fixed

threshold, which cannot be changed by any settings of the registers. The transition from low

to high occurs when the voltage on the LEDIN pin falls to 300 mV, which is the optimum

value from an efficiency point of view.

Figure 10.

READY pin behavior in Flash mode

READY pin level

V

DCTHRESHOLD

V

SUPERCAP

4.2 V

READY pin level

V

DCTHRESHOLD

V

SUPERCAP

4.2 V

AM07804v1

Figure 11.

READY pin behavior in Torch mode optimized

READY pin level

V

V

SUPERCAP

4.2 V

READY pin level

V

V

SUPERCAP

4.2 V

AM07805v1