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SW＿CE

STATUS

ON

Stand-by

OFF

Operation

SW＿CE

STATUS

ON

Operation

OFF

Stand-by

CE VOLTAGE LEVEL

OPERATIONAL STATES

H Level

Synchronous

PWM/PFM

Automatic Switching

L Level

Stand-by

■FUNCTION CHART

<CE Pin Function>

The operation of the XC9254R series will enter into the shut down mode when a low level signal is input to the CE pin.

During

the shutdown mode, the current consumption of the IC becomes 0μA (TYP.), with a state of high impedance at the Lx pin and

The IC starts its operation by inputting a high level signal to the CE pin.

The input to the CE pin is a CMOS input and

the sink current is 0μA (TYP.).

●Examples of how to use CE pin

(A)

(B)

(A)

(B)

■OPERATIONAL DESCRIPTION (Continued)

<Soft Start>

The XC9254R series provide 1.0ms (TYP).

Soft start time is defined as the time interval to reach 90% of the output voltage from the time when the CE pin is turned on.

90% of setting voltage

CE

CE