BU4216FVE-TR Rohm Semiconductor, BU4216FVE-TR Datasheet - Page 7

• Manufacturer Part Number: BU4216FVE-TR
• Description: IC DETECTOR VOLT 1.6V ODRN 5VSOF
• Manufacturer: Rohm Semiconductor
• Type: Simple Reset/Power-On Resetr

Specifications of BU4216FVE-TR

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: 1.6V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 5-VSOF
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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V1
2) Examples of the power supply with resistor dividers
* This data is for reference only.
The figures will vary with the application, so please confirm actual operating conditions before use.
In applications where the power supply input terminal (VDD) of an IC with resistor dividers, it is possible that a through
current will momentarily flow into the circuit when the output logic switches, resulting in malfunctions (such as output
oscillatory state).
(Through-current is a current that momentarily flows from the power supply (VDD) to ground (GND) when the output level
switches from “High” to “Low” or vice versa.)
A voltage drop of [the through-current (I1)] × [input resistor (R2)] is caused by the through current, and the input voltage
to descends, when the output switches from “Low” to “High”. When the input voltage decreases and falls below the
detection voltage, the output voltage switches from “High” to “Low”. At this time, the through-current stops flowing through
output “Low”, and the voltage drop is eliminated. As a result, the output switches from “Low” to “High”, which again
causes the through current to flow and the voltage drop. This process is repeated, resulting in oscillation.
Consider the use of BU42□□ when the power supply input it with resistor dividers.
0.001
0.01
0.1
R2
R1
10
1
3
VDD - IDD Peak Current Ta=25°C
4
CIN
I1
5
Fig.20
6
VDD[V]
Fig.21 Current Consumption vs. Power Supply Voltage
V
BU42□□
BU43□□
DD
7
GND
8
9
BU43xx
BU42xx
BD52xx
BD53xx
C
10
7/11
L
V
OUT
0
I
DD
2.5
2.0
1.5
1.0
0.5
0.0
-50 -30 -10
V
DET
Temp - IDD(BU42xx)
10
Through
Current
30
Temp
50
70
Technical Note
2009.11 - Rev.C
90
110 130
VDD3V
VDD6V
VDD7V
VDD4V
V
DD