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CS8182DTRKG Fiches technique(PDF) 6 Page - ON Semiconductor

No de pièce CS8182DTRKG
Description  Micropower 200 mA Low Dropout Tracking Regulator/Line Driver
Download  12 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS8182DTRKG Fiches technique(HTML) 6 Page - ON Semiconductor

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APPLICATION NOTES
VOUT Short to Battery
The CS8182 will survive a short to battery when hooked
up the conventional way as shown in Figure 13. No damage
to the part will occur. The part also endures a short to battery
when powered by an isolated supply at a lower voltage as in
Figure 14. In this case the CS8182 supply input voltage is set
at 7 V when a short to battery (14 V typical) occurs on VOUT
which normally runs at 5 V. The current into the device
(ammeter in Figure 14) will draw additional current as
displayed in Figure 15.
VOUT
GND
GND
Adj
VIN
GND
GND
VREF/
ENABLE
VOUT
5.0 V
70 mA
C1*
1.0
mF
Automotive Battery
typically 14 V
Short to battery
Figure 13.
C2**
10
mF
VOUT
GND
GND
Adj
VIN
GND
GND
VREF/
ENABLE
VOUT
C1*
1.0
mF
Figure 14.
C2**
10
mF
C3***
10 nF
VOUT = VREF
5.0 V
Loads
B+
5.0 V
70 mA
Automotive Battery
typically 14 V
Short to battery
VOUT = VREF
5.0 V
Loads
B+
C3***
10 nF
A
7 V
** C2 is required for stability.
* C1 is required if the regulator is far from the power source filter.
*** C3 is recommended for EMC susceptibility.
+
+
+
+
Figure 15. VOUT Short to Battery
2.0
1.8
1.6
1.4
1.2
1.0
0.6
0.4
0.2
0
6
510
15
20
25
VOUT VOLTAGE (V)
0.8
7 8 9
1112 1314
1617 1819
2122 2324
26
Switched Application
The CS8182 has been designed for use in systems where
the reference voltage on the VREF/ENABLE pin is
continuously
on.
Typically,
the
current
into
the
VREF/ENABLE pin will be less than 1.0
mA when the
voltage on the VIN pin (usually the ignition line) has been
switched out (VIN can be at high impedance or at ground.)
Reference Figure 16.
VOUT
GND
GND
Adj
VIN
GND
GND
VREF/
ENABLE
VOUT
VREF
5.0 V
VBAT
C1
1.0
mF
Ignition
Switch
< 1.0
mA
Figure 16.
C2
10
mF


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