14/20

SERIES

EN/CE INPUT LOGIC

XC6413/14 * A ~ D

High Active with Pull-Down

XC6413/14 * E ~ K

High Active with No Pull-Down

XC6413/14 * L ~ P

Low Active with Pull-Up

XC6413/14 * R ~ U

Low Active with No Pull-Up

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OPERATIONAL EXPLANATION (Continued)

<EN / CE Pin (Continued)>

Note that as the XC6413/14*E to K types of the XC6413/14A to D series are ' High Active / No Pull-Down' and XC6413/14*R

to U types of the XC6413/14A to D series are ' Low Active / No Pull-Up', operations will become unstable with the CE pin

open (See the chart below).

the correct specifications for the EN or CE pin, the IC will operate normally. However, supply current may increase as a

<Toggle Operation>

The XC6413/14 A and B series have a built-in toggle ON/OFF switch which repeats an on/off operation via the EN pin's

leading edge signal when the EN logic is HIGH active, and via the EN pin's falling edge signal when the EN logic is LOW active

(Please also refer the figure below). The EN input signal duration should be over 500nsec. If the EN input signal is less than

500nsec, it is possible that the circuit fails to respond and the toggle function does not operate. To operate the toggle function

properly when the EN pin voltage noise is large, a RC filter should be used to reduce the noise in the signal to the EN pin.

XC6413/14B series can reset FF (flip flop), used for the toggle operation, internally by using a signal of the detector function.

The signal of the detector function resets FF after converted to 1 shot signal in the IC. The regulator block start to output

when a signal is given via the EN pin again.

EN Logic High Active

(*A~D Series)

[XC6413 Series]

[XC6414 Series]

Internal Circuit Response Time

Approximate 20μsec

500nsec or more

EN Pin Signal

Internal Circuit Response Time

Approximate 10μsec

EN Pin Signal

500nsec or more