XCL201 datasheet(10/21 Pages) TOREX

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XCL201/XCL202 Series

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OPERATIONAL DESCRIPTION (Continued)

The operation of the XCL201/XCL202 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 VOUT pin. 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.).

●XCL20/XCL202 series - Examples of how to use CE pin

Soft start time is internally set 0.25ms to 0.32ms (TYP). Soft start time is defined as the time to reach 90% of the output nominal voltage when

the CE pin is turned on.

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FUNCTION CHART

(A)

SW_CE

SELECTED STATUS

Stand-by

OFF

Operation

(B)

SW_CE

SELECTED STATUS

Operation

OFF

Stand-by

OPERATIONAL STATES

VOLTAGE

LEVEL

XCL201

XCL202

H Level

(*1)

Synchronous

PWM Fixed Control

Synchronous

PWM/PFM Automatic Switching

L Level

(*2)

Stand-by

* CE pin voltage level range

(*1) H level: 0.65V<VCE<6V

(*2) L level: 0V<VCE<0.25V

(*3) CE pin should not be left open to avoid unstable operation.

tSS

VCEH

VOUT

VIN

VDD

SW_CE

< IC inside >

VIN

VDD

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