XC6207_1 Datasheet, PDF (12/33 Pages) Torex Semiconductor – High Speed "Green Operation" LDO Voltage Regulators

XC6207Series
˙OPERATIONAL EXPLANATION (Continued)
<Current Limiter, Short-Circuit Protection>
The XC6207 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 and
output voltage drops further and output current decreases. When the output pin is shorted, a current of about 50mA
flows.
<The CE Pin>
The IC's internal circuitry can be shutdown via the signal from the CE pin with the XC6207 series. In shutdown mode,
output at the VOUT pin will be pulled down to the VSS level via R1 & R2. However, as for the XC6207B series, the CL
auto-discharge resistor is connected in parallel to R1 and R2 while the power supply is applied to the VIN pin.
Therefore, time until the VOUT pin reaches the VSS level becomes short. We suggest that you use this IC with either a
VIN voltage or a VSS voltage input at the CE pin. If this IC is used with the correct specifications for the CE pin, the IC will
operate normally. However, supply current may increase as a result of through current in the IC's internal circuitry when
medium voltage is input.
˙NOTES ON USE
1. Please use this IC within the stated absolute maximum ratings. The IC is liable to malfunction should the ratings be
exceeded.
2. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output
current. Please strengthen VIN and VSS wiring in particular.
3. Please wire the input capacitor (CIN) and the output capacitor (CL) as close to the IC as possible.
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