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BU4816G-TR Datasheet(PDF) 12 Page - Rohm

No. de Pieza. BU4816G-TR
Descripción  Low Voltage Standard CMOS Voltage Detector ICs
Descarga  16 Pages
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Fabricante  ROHM [Rohm]
Página de inicio  http://www.rohm.com
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BU4816G-TR Datasheet(HTML) 12 Page - Rohm

 
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Datasheet
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BU48xx series
BU49xx series
TSZ02201-0R7R0G300060-1-2
© 2014 ROHM Co., Ltd. All rights reserved.
03.Feb.2014 Rev.010
www.rohm.com
TSZ22111・15・001
3) Examples of the power supply with resistor dividers
In applications where the power supply input terminal (VDD) of an IC is connected through 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.)
Fig.18
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 BD48xx when the power supply input it with resistor dividers.
Fig.19
Current Consumption vs. Power Supply Voltage
* This data is for reference only.
The figures will vary with the application, so please confirm actual operating conditions before use.
VOUT
R2
VDD
BU48xx
BU49xx
GND
R1
I1
V1
CIN
CL
IDD
VDD
VDET
0
Through
Current
0.001
0.01
0.1
1
10
3
4
5
6
7
8
9
10
VDD[V]
VDD - IDD Peak Current Ta=25°C
BU49xx,BU43xx
BU48xx,BU42xx
BD52xx
BD53xx
T em p - ID D (B U 42xx)
0.0
0.5
1.0
1.5
2.0
2.5
-50 -30 -10
10
30
50
70
90
110 130
T em p
V D D 3V
V D D 6V
V D D 7V
V D D 4V


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