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L4949NG

P1-P3P4-P6P7-P9P10-P12
L4949, NCV4949
http://onsemi.com
4
4.96
4.98
5.0
5.02
5.04
-40 -20 0 40 6020 100 120
T
J
, JUNCTION TEMPERATURE (°C)
80
V
CC
= 14 V
I
out
= 1.0 mA
V
out
, OUTPUT VOLTAGE (V)
0
2.0
3.0
4.0
6.0
010
V
CC
, SUPPLY VOLTAGE (V)
1.0
1.0
T
J
= 25°C
R
L
= 100 W
R
L
= 5.0 k
5.0
V
out
, OUTPUT VOLTAGE (V)
2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
TYPICAL CHARACTERIZATION CURVES
0
100
150
200
250
0.1 100
I
out
, OUTPUT CURRENT (mA)
101.0
50
T
J
= 25°C
V
drop
, DROPOUT VOLTAGE (mV)
0
0.10
0.20
0.30
0.40
-40 -20 0 40 6020 100 120
T
J
, JUNCTION TEMPERATURE (°C)
80
V
drop
, DROPOUT VOLTAGE (mV)
I
out
= 50 mA
I
out
= 10 mA
I
out
= 100 mA
Figure 2. ESR Stability Border Vs. Output
Current (Full ESR Range)
Figure 3. ESR Stability Border Vs. Output Current
(Very Low ESR)
Figure 4. Output Voltage versus
Junction Temperature
Figure 5. Output Voltage versus
Supply Voltage
Figure 6. Dropout Voltage versus
Output Current
Figure 7. Dropout Voltage versus
Junction Temperature
010
OUTPUT CURRENT (mA)
10.0
0
Unstable Region
V
in
= 13.5 V
C
out
= 10 mF
ESR
20 30 40 50 60 70 80 90 100
0.5
0.4
0.3
0.2
010
OUTPUT CURRENT (mA)
0.1
0
20 30 40 50 60 70 80 90 100
(W)
ESR
(W)
Stable Region
Stable Region
V
in
= 13.5 V
C
out
= 10 mF
Unstable Region
20.0
30.0
40.0
50.0
60.0
L4949, NCV4949
http://onsemi.com
5
TYPICAL CHARACTERIZATION CURVES (continued)
6.0
5.0
4.0
3.0
2.0
4.0 4.1
V
out
, OUTPUT VOLTAGE (V)
1.0
0
Resistor 10 k
from Reset Output
to 5.0 V
T
J
= 25°C
V
Reset
, RESET OUTPUT (V)
4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0
4.7
4.66
4.62
4.58
4.5
-40 -20
T
J
, JUNCTION TEMPERATURE (°C)
4.46
4.42
Upper Threshold
V
Reset
, RESET THRESHOLD VOLTAGE (V)
0 20 40 60 80 100 120
4.54
Lower Threshold
Figure 8. Quiescent Current versus
Output Current
Figure 9. Quiescent Current versus
Supply Voltage
6.0
5.0
4.0
2.0
1.0 1.15
V
SI
, SENSE INPUT VOLTAGE (V)
1.0
0
T
J
= 25°C
V
SO
, SENSE OUTPUT VOLTAGE (V)
1.2 1.25 1.3 1.35 1.4 1.45 1.5
3.0
Resistor 10 k
from Sense Output
to 5.0 V
1.11.05
1.4
1.38
1.36
1.34
1.3
-40 -20
T
J
, JUNCTION TEMPERATURE (°C)
1.28
1.2
Upper Threshold
V
SI
, SENSE INPUT VOLTAGE (V)
0 20 40 60 80 100 120
1.32
Lower Threshold
1.26
1.24
1.22
Figure 10. Reset Output versus
Regulator Output Voltage
Figure 11. Reset Thresholds versus
Junction Temperature
Figure 12. Sense Output versus
Sense Input Voltage
Figure 13. Sense Thresholds versus
Junction Temperature
3.0
2.5
2.0
1.5
1.0
0.1 1.0 10 100
0.5
0
V
CC
= 14 V
T
J
= 25°C
I
out
, OUTPUT CURRENT (mA)
I
Q
, QUIESCENT CURRENT (mA)
3.0
2.5
2.0
1.5
1.0
0 5.0 10 15 20 25 30
V
CC
, SUPPLY VOLTAGE (V)
0.5
0
R
L
= 5.0 k
R
L
= 100 W
T
J
= 25°C
I
Q
, QUIESCENT CURRENT (mA)
L4949, NCV4949
http://onsemi.com
6
APPLICATION INFORMATION
Supply Voltage Transient
High supply voltage transients can cause a reset output
signal perturbation. For supply voltages greater than 8.0 V
the circuit shows a high immunity of the reset output against
supply transients of more than 100 V/ms. For supply voltages
less than 8.0 V supply transients of more than 0.4 V/ms can
cause a reset signal perturbation. To improve the transient
behavior for supply voltages less than 8.0 V a capacitor at
Pin 3 can be used. A capacitor at Pin 3 (C3 ≤ 1.0 mF) also
reduces the output noise.
S
o
V
Z
(optional)
V
out
V
out
V
bat
C
s
C
O
C3
R
SO
10 kW
Regulator
1.23 V
ref
2.0 V
2.0 mA
Reset
1.23 V
Sense
GND
Reset
S
i
V
CC
C
T
38 4
6
7
5
2
1
V
CC
+
-
+
-
Preregulator
6.0 V
10 kW
Figure 14. Application Schematic
NOTE: 1. For stability: C
s
≥ 1.0 mF, C
O
≥ 4.7 mF, ESR < 10 W at 10 kHz
2. Recommended for application: C
s
= C
O
= 10 mF
P1-P3P4-P6P7-P9P10-P12

L4949NG

Mfr. #:
Buy L4949NG
Manufacturer:
ON Semiconductor
Description:
IC REG LINEAR 5V 100MA 8DIP
Lifecycle:
New from this manufacturer.
Delivery:
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