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<Current Limiter, Short-Circuit Protection>

The XC6204/05 series includes a combination of a fixed current limiter circuit & a foldback circuit, which aid the operations of

the current limiter and circuit protection. When the load current reaches the current limit level, the fixed current limiter circuit

operates and output voltage drops. As a result of this drop in output voltage, the foldback circuit operates, output voltage

drops further and output current decreases. When the output pin is shorted, a current of about 50mA flows. However, when

the input/output voltage differential is quite small, this current will be about 200mA.

<CE Pin>

The IC's internal circuitry can be shutdown via the signal from the CE pin with the XC6204/05 series. In shutdown mode,

(please refer to the selection guide). Note that as the standard XC6204/05B type is ' High Active/No Pull Down', operations

will become unstable with the CE pin open. Although the CE pin is equal to an inverter input with CMOS hysteresis, with

either the pull-up or pull-down options, the CE pin input current will increase when the IC is in operation.

correct specifications for the CE pin, the operational logic is fixed and the IC will operate normally. However, supply current

may increase as a result of through current in the IC's internal circuitry if a voltage between 0.25V and 1.5V is input.

<Minimum Operating Voltage>

In order to stabilize the IC's operations, an input voltage of more than 2.0V is needed.

Should the input voltage be less

than 2.0V, the output voltage may not be regulated correctly.

(Please refer to Input Voltage vs. Output Voltage

characteristics below.)

② The input power supply will begin to rise after a few hundred msec.

(Please also refer to the transient response characteristics.)

○ Input Voltage vs. Output Voltage

○ Enable Response Time

○ Turn-ON Response Time

■OPERATIONAL EXPLANATION (Continued)