13/20
XC6118
Series
VSEN
Cd
VSS
VIN
VOUT
VSENVIN
Cd
R
PULL
=100kΩ
VOUT
(No resistor needed fo
CMOS output products)
■NOTES ON USE
Figure 3: Circuit example with the delay capacitance pin (Cd)
connected to a Schottky barrier diode
NOTE：R
OFF
=V
OUT
/I
LEAK
Figure 4: Circuit example of XC6118N Series
1. Please use this IC within the stated maximum ratings. For temporary, transitional voltage drop or voltage rising
phenomenon, the IC is liable to malfunction should the ratings be exceeded.
2. The power supply input pin voltage drops by the resistance between power supply and the V
IN pin, and by through current at
operation of the IC. At this time, the operation may be wrong if the power supply input pin voltage falls below the minimum
operating voltage range. In CMOS output, for output current, drops in the power supply input pin voltage similarly occur.
Moreover, in CMOS output, when the V
IN pin and the sense pin are short-circuited and used, oscillation of the circuit may
occur if the drops in voltage, which caused by through current at operation of the IC, exceed the hysteresis voltage. Note it
especially when you use the IC with the V
IN pin connected to a resistor.
3. When the setting voltage is less than 1.0V, be sure to separate the V
IN pin and the sense pin, and to apply the voltage over
1.0V to the V
IN pin.
4. Note that a rapid and high fluctuation of the power supply input pin voltage may cause a wrong operation.
5. Power supply noise may cause operational function errors, Care must be taken to put the capacitor between V
IN
-GND and
test on the board carefully.
6. When there is a possibility of which the power supply input pin voltage falls rapidly (e.g.: 6.0V to 0V) at release operation
with the delay capacitance pin (Cd) connected to a capacitor, use a Schottky barrier diode connected between the V
IN pin
and the Cd pin as the Figure 3 shown below.
7. In N channel open drain output, V
OUT
voltage at detect and release is determined by resistance of a pull up resistor
connected at the V
OUT
pin. Please choose proper resistance values with refer to Figure 4;
During detection: V
OUT
= V
PULL
/ (1+R
PULL
/ R
ON
)
V
PULL
: Pull up voltage
R
ON
(※1)：On resistance of N channel driver M3 can be calculated as V
DS
/ I
OUT1
from electrical characteristics,
For example, when (※2) R
ON
= 0.5 / 0.8×10
-3
= 625Ω（MAX.）at V
IN
=2.0V, V
PULL
= 3.0V and V
OUT
≦0.1V at detect,
R
PULL
= (V
PULL
/V
OUT
-1)×R
ON
= (3 / 0.1-1)×625≒18ｋΩ
In this case, R
PULL
should be selected higher or equal to 18kΩ in order to keep the output voltage less than 0.1V during
detection.
(※1) R
ON
is bigger when V
IN
is smaller, be noted.
(※2) For calculation, Minimum V
IN
should be chosen among the input voltage range.
During releasing：V
OUT
= V
PULL
/ (1 + R
PULL
/ R
OFF
)
V
PULL
：Pull up voltage
R
OFF
：On resistance of N channel driver M3 is 15MΩ（MIN.） when the driver is off (as to V
OUT
/ I
LEAK
)
For example：when V
PULL
= 6.0V and V
OUT
≧ 5.99V,
R
PULL
= (V
PULL
/ V
OUT
-1)×R
OFF
= (6/5.99-1)×15×10
6
≒25 kΩ
In this case, R
PULL
should be selected smaller or equal to 25 kΩ in order to obtain output voltage higher than 5.99V during
releasing.
8. Torex places an importance on improving our products and their reliability.
We request that users incorporate fail-safe designs and post-aging protection treatment when using Torex products in their
systems.
Vref
Comparator
Inverter
R1
R2
R3
M5
ＲＳEN=R1+R2+R3
M2
M1
M3
VOUT
VSS
R
delay
Cd
VSEN
VIN
VIN
VSEN
Cd
M4
