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XC6118 Datasheet(PDF) 13 Page - Torex Semiconductor

Part No. XC6118
Description  Voltage Detector with Separated Sense Pin & Delay Capacitor Pin
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Maker  TOREX [Torex Semiconductor]
Homepage  http://www.torex.co.jp
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XC6118 Datasheet(HTML) 13 Page - Torex Semiconductor

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XC6118
Series
VSEN
Cd
VSS
VIN
VOUT
VSEN
VIN
Cd
R=100kΩ
VOUT
(No resistor needed for
CMOS output products)
■NOTES ON USE
Figure 3: Circuit example with the delay capacitance pin (Cd)
connected to a Schottky barrier diode
NOTE:ROFF=VOUT/ILEAK
Figure 4: Circuit example of XC6118N Series
1. Use this IC within the stated maximum ratings.
Operation beyond these limits may cause degrading or permanent damage
to the device.
2. The power supply input pin voltage drops by the resistance between power supply and the VIN 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 VIN 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 VIN pin connected to a resistor.
3. When the setting voltage is less than 1.0V, be sure to separate the VIN pin and the sense pin, and to apply the voltage over
1.0V to the VIN 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 VIN-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 VIN pin
and the Cd pin as the Figure 3 shown below.
7. In N channel open drain output, VOUT voltage at detect and release is determined by resistance of a pull up resistor
connected at the VOUT pin. Please choose proper resistance values with refer to Figure 4;
During detection: VOUT = VPULL / (1+RPULL / RON)
VPULL: Pull up voltage
RON(※1):On resistance of N channel driver M3 can be calculated as VDS / IOUT1 from electrical characteristics,
For example, when (※2) RON = 0.5 / 0.8×10
-3 = 625Ω(MIN.)at V
IN=2.0V, VPULL = 3.0V and VOUT
≦0.1V at detect,
RPULL= (VPULL /VOUT-1)×RON= (3 / 0.1-1)×625≒18kΩ
In this case, RPULL should be selected higher or equal to 18kΩ in order to keep the output voltage less than 0.1V during
detection.
(※1) RON is bigger when VIN is smaller, be noted.
(※2) For calculation, Minimum VIN should be chosen among the input voltage range.
During releasing:VOUT = VPULL / (1 + RPULL / ROFF)
VPULL:Pull up voltage
ROFF:On resistance of N channel driver M3 is 15MΩ(MIN.) when the driver is off
(as to VOUT / ILEAK)
For example:when VPULL = 6.0V and VOUT ≧ 5.99V,
RPULL = (VPULL / VOUT-1)×ROFF = (6/5.99-1)×15×10
6 ≒25 kΩ
In this case, RPULL should be selected smaller or equal to 25 kΩ in order to obtain output voltage higher than 5.99V during
releasing.
Vref
Comparator
Inverter
R1
R2
R3
M5
SEN=R1+R2+R3
M2
M1
M3
VOUT
VSS
Rdelay
Cd
VSEN
VIN
VIN
VSEN
Cd
M4


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