TC54VN2902ECB713 Microchip Technology, TC54VN2902ECB713 Datasheet - Page 6

• Manufacturer Part Number: TC54VN2902ECB713
• Description: IC VOLT DETECTOR 2.9V SOT23A
• Manufacturer: Microchip Technology
• Type: Simple Reset/Power-On Resetr

Specifications of TC54VN2902ECB713

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Voltage - Threshold: 2.9V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23A-3
• Threshold Voltage: 2.9V
• No. Of Supervisors / Monitors: 1
• Supply Voltage Range: 0.7V To 6V, 0.7V To 10V
• Reset Type: Active-Low
• Supply Current: 1.1µA
• Delay Time: 200µs
• Monitored Voltage: 1.1 V to 6 V
• Manual Reset: Not Resettable
• Watchdog: No Watchdog
• Supply Voltage (max): 10 V
• Supply Voltage (min): 0.7 V
• Supply Current (typ): 3.6 uA
• Maximum Power Dissipation: 240 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Reset Timeout: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 158-2036-2; 158-2036-2; TC54VN2902ECB71TR

TC54
4.0
4.1
Although the TC54 has a pre-programmed V
sometimes necessary to make adjustments during pro-
totyping. This can be accomplished by connecting an
external resistor divider to a TC54, which has a V
lower than that of V
To maintain detector accuracy, the bleeder current
through the divider should be significantly higher than
the 1 µA operating current required by the TC54. A
reasonable value for this bleeder current is 100 µA (100
times the 1 µA required by the TC54). For example, if
V
of R
can be rounded to the nearest standard value and
plugged into the equation of Figure 4-1 to calculate
values for R
recommended.
FIGURE 4-1:
using external resistor divider.
DS21434G-page 6
DET
1
Where:
Note:
+ R
– = 2V and the desired trip point is 2.5V, the value
R
R
V
V
SOURCE
(V
SOURCE
2
1
APPLICATIONS INFORMATION
Modifying The Trip Point, V
2
DET
is 25 k (2.5V/100 µA). The value of R
V
SOURCE
In this example, V
greater than (V
1
– ) = Threshold Voltage setting of TC54
V
and R
= Voltage to be monitored
IN
SOURCE
=
Modify trip-point of the TC54
2
V
. 1% tolerance resistors are
SS
------------------- -
R 1
TC54
R
(Figure 4-1).
+
DET
1
R 2
– )
=
SOURCE
V
DET
V
OUT
-
must be
DET
DET
1
– , it is
DET
–
+ R
–
2
4.2
Low operating power and small physical size make the
TC54 series ideal for many voltage detector applica-
tions, such as those shown in Figures 4-2, 4-3 and 4-4.
Figure 4-2 shows a low-voltage gate drive protection
circuit that prevents overheating of the logic-level
MOSFET due to insufficient gate voltage. When the
input signal is below the threshold of the TC54VN, its
output grounds the gate of the MOSFET. Figure 4-3 and
Figure 4-4 show the TC54 in conventional voltage
monitoring applications.
FIGURE 4-2:
Protection.
FIGURE 4-3:
FIGURE 4-4:
Pwr
Sply
+
–
+
– –
Other Applications
TC54VX
4.3V
V
TC54VX
V
TC54VX
V
IN
V
SS
SS
IN
270
V
V
IN
SS
MOSFET Low Drive
Battery Voltage Monitor.
Power Good Monitor.
 2004 Microchip Technology Inc.
V
OUT
V
V
OUT
OUT
V
CC
MTP3055EL
R
Power Good
L
BATLOW