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NCV8184DG Datasheet(PDF) 5 Page - ON Semiconductor

Part # NCV8184DG
Description  Micropower 70 mA Low Dropout Tracking Regulator/Line Driver
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCV8184DG Datasheet(HTML) 5 Page - ON Semiconductor

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NCV8184
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5
CIRCUIT DESCRIPTION
ENABLE Function
By pulling the VREF/ENABLE lead below 0.8 V, (see
Figure 16 or Figure 17), the IC is disabled and enters a sleep
state where the device draws less than 20
mA from supply.
When the VREF/ENABLE lead is greater than 2.1 V, VOUT
tracks the VREF/ENABLE lead normally.
Output Voltage
The output is capable of supplying 70 mA to the load
while configured as a similar (Figure 13), lower (Figure 15),
or higher (Figure 14) voltage as the reference lead. The Adj
lead acts as the inverting terminal of the op amp and the
VREF lead as the non−inverting.
The device can also be configured as a high−side driver as
displayed in Figure 18.
Figure 13. Tracking Regulator at the Same Voltage
Figure 14. Tracking Regulator at Higher Voltages
VIN
VOUT
GND
GND
VREF/
GND
GND
Adj
ENABLE
Loads
5.0 V
B+
C1*
1.0 mF
C2**
10 mF
VOUT, 70 mA
VOUT + VREF
VIN
VOUT
GND
GND
VREF/
GND
GND
Adj
ENABLE
Loads
VREF
B+
C1*
1.0 mF
C2**
10 mF
VOUT, 70 mA
RA
RF
VOUT + VREF(1 )
RE
RA
)
C3***
10 nF
C3***
10 nF
Figure 15. Tracking Regulator at Lower Voltages
Figure 16. Tracking Regulator with ENABLE Circuit
VIN
VOUT
GND
GND
VREF/
GND
GND
Adj
ENABLE
Loads
VREF
B+
C1*
1.0 mF
C2**
10 mF
VOUT, 70 mA
VOUT + VREF( R2
R1 ) R2
)
R2
R1
VIN
VOUT
GND
GND
VREF/
GND
GND
Adj
ENABLE
from MCU
VREF
B+
C1*
1.0 mF
C2**
10 mF
VOUT, 70 mA
R
C3***
10 nF
C3***
10 nF
Figure 17. Alternative ENABLE Circuit
Figure 18. High−Side Driver
VIN
VOUT
GND
GND
VREF/
GND
GND
Adj
ENABLE
10 mF
VIN
VOUT
GND
GND
VREF/
GND
GND
Adj
ENABLE
MCU
B+
70 mA
VOUT + B )* VSAT
** C2 is required for stability.
* C1 is required if the regulator is far from the power source filter. In case of power supply generates voltage ripple (e.g. DC-DC con-
verter) a passive low pass filter with C1 value at least 1 mF is required to suppress the ripple. The filter should be designed according
to particular operating conditions and verified in the application.
70 mA
I/O
NCV8501
6.0 V−40 V
VIN
100 nF
VREF (5.0 V)
mC
To Load
(e.g. sensor)
C1*
1.0 mF
C3***
10 nF
C3***
10 nF
*** C3 is recommended for EMC susceptibility


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