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NCV8184PDG

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
NCV8184
http://onsemi.com
4
TYPICAL PERFORMANCE CHARACTERISTICS
+25°C
−40°C
+125°C
0
OUTPUT VOLTAGE V
OUT
(V)
0
INPUT VOLTAGE V
IN
(V)
2
3
4
5
6
5101520
1
30
Figure 8. Dropout Voltage vs. Output Current
OUTPUT VOLTAGE (V)
0
1
2
3
4
5
7
6
REFERENCE VOLTAGE (V)
01
Figure 9. Output Voltage vs. Input Voltage
Figure 10. Output Voltage vs. Reference Voltage
234567
REFERENCE CURRENT (mA)
0.0
0.1
0.2
0.3
0.4
0.5
0.7
0.6
REFERENCE VOLTAGE (V)
012 34 567
25
0
THERMAL RESISTANCE, JUNCTION
TO AMBIENT, R
q
JA
, (°C/W)
COPPER AREA (in
2
)
80
85
90
95
120
1234 65
100
105
110
115
Figure 11. Reference Current vs. Reference
Voltage
Figure 12. SOIC−8, qJA as a Function of the
Pad Copper Area (2.0 oz. Cu Thickness),
Board Material = 0.0625 G−10/R−4
DROPOUT VOLTAGE (V)
0.0
OUTPUT CURRENT (mA)
0.5
0
20 30 5040 60 70
0.2
0.3
0.4
0.1
10
+25°C
−40°C
+125°C
V
REF
/ENABLE = 5.0 V
NCV8184
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5
CIRCUIT DESCRIPTION
ENABLE Function
By pulling the V
REF
/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 V
REF
/ENABLE lead is greater than 2.1 V, V
OUT
tracks the V
REF
/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
V
REF
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
V
IN
V
OUT
GND
GND
V
REF
/
GND
GND
Adj
ENABLE
Loads
5.0 V
B+
C1*
1.0 mF
C2**
10 mF
V
OUT
, 70 mA
V
OUT
+ V
REF
V
IN
V
OUT
GND
GND
V
REF
/
GND
GND
Adj
ENABLE
Loads
V
RE
F
B+
C1*
1.0 mF
C2**
10 mF
V
OUT
, 70 mA
R
A
R
F
V
OUT
+ V
REF
(1 )
R
E
R
A
)
NCV8184
NCV8184
C3***
10 nF
C3***
10 nF
Figure 15. Tracking Regulator at Lower Voltages
Figure 16. Tracking Regulator with ENABLE Circuit
V
IN
V
OUT
GND
GND
V
REF
/
GND
GND
Adj
ENABLE
Loads
V
REF
B+
C1*
1.0 mF
C2**
10 mF
V
OUT
, 70 mA
V
OUT
+ V
REF
(
R2
R1 ) R2
)
R2
R1
V
IN
V
OUT
GND
GND
V
REF
/
GND
GND
Adj
ENABLE
from MCU
V
RE
F
B+
C1*
1.0 mF
C2**
10 mF
V
OUT
, 70 mA
R
NCV8184
NCV8184
C3***
10 nF
C3***
10 nF
Figure 17. Alternative ENABLE Circuit
Figure 18. High−Side Driver
V
IN
V
OUT
GND
GND
V
REF
/
GND
GND
Adj
ENABLE
10 mF
V
IN
V
OUT
GND
GND
V
REF
/
GND
GND
Adj
ENABLE
MCU
B+70 mA
V
OUT
+ B )*V
SAT
** 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.
NCV8184
NCV8184
70 mA
I/O
NCV8501
6.0 V−40 V
V
IN
100 nF
V
REF
(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
NCV8184
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6
APPLICATION NOTES
V
OUT
Short to Battery
The NCV8184 will survive a short to battery when hooked
up the conventional way as shown in Figure 19. 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 20. In this case the NCV8184 supply input voltage is
set at 7.0 V when a short to battery (14 V typical) occurs on
V
OUT
which normally runs at 5.0 V. The current into the
device (ammeter in Figure 20) will draw additional current
as displayed in Figure 21.
V
OUT
GND
GND
Adj
V
IN
GND
GND
V
REF
/
ENABLE
V
OUT
5.0 V
70 mA
C1*
1.0 mF
Automotive Battery
typically 14 V
Short to battery
NCV8184
Figure 19.
C2**
10 mF
V
OUT
GND
GND
Adj
V
IN
GND
GND
V
REF
/
ENABLE
V
OUT
C1*
1.0 mF
NCV8184
Figure 20.
C2**
10 mF
C3***
10 nF
V
OUT
= V
REF
5.0 V
Loads
B+
5.0 V
70 mA
Automotive Battery
typically 14 V
Short to battery
V
OUT
= V
REF
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 21. V
OUT
Short to Battery
18
16
14
12
10
6
4
2
0
6510152025
V
OUT
VOLTAGE (V)
CURRENT (mA)
8
7 8 9 11121314 16171819 21222324 26
Switched Application
The NCV8184 has been designed for use in systems where
the reference voltage on the V
REF
/ENABLE pin is
continuously on. Typically, the current into the
V
REF
/ENABLE pin will be less than 1.0 mA when the
voltage on the V
IN
pin (usually the ignition line) has been
switched out (V
IN
can be at high impedance or at ground.)
Reference Figure 22.
V
OUT
GND
GND
Adj
V
IN
GND
GND
V
REF
/
ENABLE
V
OUT
V
REF
5.0 V
V
BAT
C1
1.0 mF
Ignition
Switch
< 1.0 mA
NCV8184
Figure 22.
C2
10 mF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

NCV8184PDG

Mfr. #:
Buy NCV8184PDG
Manufacturer:
ON Semiconductor
Description:
IC REG LINEAR POS ADJ 70MA 8SOIC
Lifecycle:
New from this manufacturer.
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