XC6216 TOREX [Torex Semiconductor], XC6216 Datasheet - Page 20

• Manufacturer Part Number: XC6216
• Description: Voltage Regullators with Stand-by Function-Input Voltage: 30V
• Manufacturer: TOREX [Torex Semiconductor]

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■ NOTES ON USE
■ OPERATIONAL EXPLANATION
1． Please use this IC within the stated absolute maximum ratings. The IC is liable to malfunction should the ratings be
2． Where wiring impedance is high, operations may become unstable due to the noise and/or phase lag depending on output
3. Phase compensation inside the IC is performed in the XC6216/XE6216 series. Therefore, an abnormal oscillation does not
<Output Voltage Control>
<Short-Circuit Protection>
The XC6216/XE6216 series includes a current fold-back circuit as a short circuit protection. When the load current reaches
the current limit level, the current fold-back circuit operates and output voltage drops. The output voltage drops further and
output current decreases. When the output pin is shorted, a current of about 30mA flows.
<CE Pin>
The IC’s internal circuitry can be shutdown via the signal from the CE pin with the XC6216/XE6216 series. In shutdown
mode, output at the V
has no pull down resistor so that it will become unstable with the CE pin open. We suggest that you use this IC with either a
V
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 medium voltage is applied.
<Thermal Protection>
When the junction temperature of the built-in driver transistor reaches the temperature limit, the thermal shutdown circuit
operates and the driver transistor will be set to OFF. The IC resumes its operation when the thermal shutdown function is
released and the IC’s operation is automatically restored because the junction temperature drops to the level of the thermal
shutdown release voltage.
<Minimum Operating Voltage>
For the stable operation of the IC, over 2.0V of input voltage is necessary. The output voltage may not be generated
normally if the input voltage is less than 2.0V.
XC6216/XE6216
IN
The voltage divided by resistors R11 & R12 is compared with the internal reference voltage by the error amplifier. The
P-channel MOSFET which is connected to the V
voltage at the V
protect circuit operate in relation to the level of output current and heat dissipation. Further, the IC’s internal circuitry
can be shutdown via the CE pin’s signal.
exceeded.
current. Please strengthen V
occur even if there is no output capacitor C
(V
over shoot, which occurs because of the load change can be controlled by placing the output capacitor C
F~1.0μF between the V
the IC as close as possible with a shorter wiring.
voltage or a V
IN
) and the ground pin (V
OUT
SS
OUT
pin is controlled and stabilized by a system of negative feedback. The current limit circuit and short
voltage input at the CE pin. If this IC is used with the correct specifications for the CE pin, the
pin will be pulled down by R11 and R12 to the V
OUT
SS
pin and V
) is required for input stability. Also, the output voltage fluctuation such as under shoot or
IN
and V
Series
SS
SS
pin. The input capacitor (C
wiring in particular.
L
. An input capacitor C
OUT
pin is then driven by the subsequent controlled signal. The output
IN
IN
SS
around 0.1μF~1.0μF between the power input pin
) and the output capacitor (C
level. Note that as the XC6216/XE6216 series
L
) should be placed to
L
around 0.1μ