ncp303lsn10t1 ON Semiconductor, ncp303lsn10t1 Datasheet - Page 20

• Manufacturer Part Number: ncp303lsn10t1
• Description: Voltage Detector Series With Programmable Delay
• Manufacturer: ON Semiconductor

input falls below the detector threshold (V
capacitor on the C
resulting in the reset output changing to its active state
indicating that an undervoltage event has been detected. The
addition of a logic gate (Logic 1) provides for reset output
control which is independent of V
This circuit monitors V
NCP302
Input Pin
Logic 1
Enable
Pin
C
Reset
Output
Note: Logic 1 is in tristate when EN = 0,
D
EN
Pin
V
TCD
 0.675 * V
Logic 1
IN
D
pin will be immediately discharged
Figure 45. Undervoltage Detection with Independent Reset Signal Control
V
V
V
V
TCD
DET
0 V
0 V
0 V
DD
DD
DD
1
0
DD
for undervoltage. If the V
C
DD
D
. If the output of the
V
DD
DET−
C
5
D
), then the
t
D2
http://onsemi.com
DD
NCP302L
Series
2
3
20
GND
Input
logic gate is tristated the undervoltage detector will behave
normally. If the tristate is de−asserted, the logic gate will pull
the C
an active state. This independent control is useful in power
supply sequencing applications when the Reset Output is
tied to the enable input of an LDO or DC−DC converter.
D
pin low resulting in the Reset Output pin changing to
Reset Output
1
t
D2
To MCU or
Logic Circuitry