NCP303LSN46T1 ON Semiconductor, NCP303LSN46T1 Datasheet - Page 21

• Manufacturer Part Number: NCP303LSN46T1
• Description: IC VOLT DETECT OD 4.6V SOT23-5
• Manufacturer: ON Semiconductor
• Type: Simple Reset/Power-On Resetr

Specifications of NCP303LSN46T1

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: 4.6V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

undervoltage conditions. If any of the three power supplies
are in an undervoltage condition, the NCP302 reset output
will be immediately set to an active low level. All three
power supplies must be above their minimum voltage levels
for the NCP302 reset output to generate a “Power Good”
level (Reset Output = Power Supply 1 or V
effective C
R
D
This circuit monitors multiple power supply rails for
Optionally, R1 may be added to provide a smaller
Power Supply 1
Power Supply 2
Power Supply 3
’ = R1
RESET Output
NCP302L
C
||
D
R
Note: V
D
Pin
D
, with R
(Peripheral Subsystem)
3.3 V Power Supply 2
5.0 V Power Supply 3
pin pullup resistance, (R
TCD
V
(I/O Subsystem)
Power Supply 1
TCD
V
0 V
0 V
0 V
V
0 V
0 V
 0.675 * V
D
(System Core)
IN
IN
(internal C
Figure 46. Multi−Rail Supply Undervoltage Monitor with Power Good
IN
D
pin pullup resistance)
C
t
D2
D
P
R1 is Optional C
).
D
R1
’), where
C
http://onsemi.com
5
D
t
D2
NCP302L
LSN45T1
LSN30T1
NCP301
NCP301
D
Series
2
3
2
3
2
3
Pin Pullup
21
GND
GND
GND
Input
Input
Input
approximately equal to 1.0 MW, and R1 > 5 kW. If R1 << R
then R1 also can decrease the reset output delay time (t
variance over the operating temperature range.
by: t
R1 is installed, then R
only if using the NCP303 to replace the NCP302. This
allows the Reset Output to be pulled up to V
the Power Supply 1 or an independent power supply rail.
t
D2
The Power Good signal time delay (t
D2
Reset Output
Reset Output
Reset Output
1
1
1
≈ R
D
* C
D
*Required for
, with R
NCP303
*
V
D
P
’ is substituted for R
R
P
D
in Ohms, and C
To MCU or
Logic Circuitry
t
D2
D2
) can be estimated
P
D
D
, which can be
. R
in Farads. If
P
is added
D2
D
)
,