NCV4949A
100 mA, 5.0 V, Low Dropout
Voltage Regulator with
Reset and Sense
The NCV4949A is a monolithic integrated 5.0 V voltage regulator
with a very low dropout and additional functions such as reset and an
uncommitted voltage sense comparator.
It is designed for supplying microcontroller/microprocessor
controlled systems particularly in automotive applications. The
NCV4949A has improved reset behavior for lower input and output
voltage levels.
Features
8
1
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MARKING
DIAGRAMS
8
SOIC−8
D SUFFIX
CASE 751
1
8
8
1
SOIC−8 EP
PD SUFFIX
CASE 751AC
1
20
SOIC−20 W
DW SUFFIX
CASE 751AC
1
NCV4949A
AWLYYWWG
V4949A
ALYWG
G
V4949A
ALYWD
G
•
•
•
•
•
•
•
•
•
•
•
Operating DC Supply Voltage Range 5.0 V to 28 V
Transient Supply Voltage Up to 40 V
High Precision Output Voltage 5.0 V
±1%
Output Current Capability Up to 100 mA
Very Low Dropout Voltage Less Than 0.4 V
Reset Circuit Sensing The Output Voltage
Programmable Reset Pulse Delay
Voltage Sense Comparator
Thermal Shutdown and Short Circuit Protections
AEC−Q100 Grade 1 Qualified and PPAP Capable
These are Pb−Free Devices
Output
Voltage (V
out
)
V
Z
3
8
C
T
4
Supply
Voltage (V
CC
)
1
Preregulator
6.0 V
2.0
mA
Reset
6
+
-
Reset
A
= Assembly Location
WL, L = Wafer Lot
YY, Y
= Year
WW, W = Work Week
G or
G
= Pb−Free Device
(Note: Microdot may be in either location)
PIN CONNECTIONS
V
CC
S
i
V
Z
C
T
1
2
3
4
(Top View)
8
7
6
5
V
out
S
o
Reset
GND
Regulator
Sense
Input
(S
i
)
2
V
s
2.0 V
Sense
Output
(S
o
)
7
+
-
1.23 V
ref
Sense
1.23 V
5
GND
ORDERING INFORMATION
Figure 1. Representative Block Diagram
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
©
Semiconductor Components Industries, LLC, 2014
1
July, 2017 − Rev. 4
Publication Order Number:
NCV4949A/D
NCV4949A
ABSOLUTE MAXIMUM RATINGS
Rating
DC Operating Supply Voltage (Note 1)
Transient Supply Voltage (t < 1.0 s) (Note 2)
Output Current
Output Voltage (Note 1)
Sense Input Current
Sense Input Voltage (Note 1)
Output Voltages (Note 1)
Reset Output
Sense Output
Output Currents
Reset Output
Sense Output
Preregulator Output Voltage (Note 1)
Preregulator Output Current
Reset Delay Voltage (Note 1)
Reset Delay Current
ESD Protection at any pin
Human Body Model
Machine Model
Charged Device Model (SOIC−20 W)
Thermal Resistance, Junction−to−Air
SOIC−8
SOIC−8 EP
SOIC−20 W
Operating Junction Temperature Range
Storage Temperature Range
T
J
T
stg
−
−
−
R
qJA
189.3
84.8
95.8
−40 to +150
−65 to +150
°C
°C
4000
200
1000
°C/W
I
Reset
I
SO
V
Z
I
Z
C
T
C
T
5.0
5.0
7.0
5.0
7.0
Internally Limited
V
mA
V
−
V
V
Reset
V
SO
20
20
mA
Symbol
V
CC
V
CC TR
I
out
V
out
I
SI
V
SI
Value
28
40
Internally Limited
20
±1.0
V
CC
Unit
V
V
−
V
mA
−
V
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Absolute negative voltage on these pins not to go below −0.3 V.
2. Load Dump Test B (with centralized load dump suppression) according to ISO16750−2 standard. Guaranteed by design. Not tested in
production. Passed Class B (V
out
< 5.5 V) according to ISO16750−1.
LEAD TEMPERATURE SOLDERING REFLOW
(Note 3)
Rating
Reflow (SMD styles only) lead free 60 − 150 sec above 217, 40 sec max at peak
Moisture Sensitivity Level (SOIC−8)
Moisture Sensitivity Level (SOIC−8EP)
Moisture Sensitivity Level (SOIC−20W)
3. Per IPC / JEDEC J−STD−020C
Symbol
Tsld
MSL
MSL
MSL
Min
−
Level 1
Level 2
Level 3
Max
260
Unit
°C
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2
NCV4949A
ELECTRICAL CHARACTERISTICS
(V
CC
= 14 V, −40°C < T
A
< 125°C, unless otherwise specified.)
Characteristic
Output Voltage (T
A
= 25°C, I
out
= 1.0 mA)
Output Voltage (6.0 V < V
CC
< 28 V, 1.0 mA < I
out
< 50 mA)
Output Voltage (V
CC
= 35 V, t < 1.0 s, 1.0 mA < I
out
< 50 mA)
Dropout Voltage
I
out
= 10 mA
I
out
= 50 mA
I
out
= 100 mA
Input to Output Voltage Difference in Undervoltage Condition
(V
CC
= 4.0 V, I
out
= 35 mA)
Line Regulation (6.0 V < V
CC
< 28 V, I
out
= 1.0 mA)
Load Regulation (1.0 mA < I
out
< 100 mA)
Current Limit
V
out
= 4.5 V
V
out
= 0 V
Quiescent Current (I
out
= 0.3 mA, T
A
< 100°C)
Quiescent Current (I
out
= 100 mA)
RESET
Reset Threshold Voltage
Reset Threshold Hysteresis
@ T
A
= 25°C
@ T
A
= −40 to +125°C
Reset Pulse Delay (C
T
= 100 nF, t
R
≥
100
ms)
Reset Reaction Time (C
T
= 100 nF)
Reset Output Low Voltage (R
Reset
= 10 kW to V
out
, V
CC
≥
3.0 V)
Reset Output High Leakage Current (V
Reset
= 5.0 V)
Delay Comparator Threshold
Delay Comparator Threshold Hysteresis
SENSE
Sense Low Threshold (V
SI
Decreasing = 1.5 V to 1.0 V)
Sense Threshold Hysteresis
Sense Output Low Voltage (V
SI
≤
1.16 V, V
CC
≥
3.0 V, R
SO
= 10 kW to V
out
)
Sense Output Leakage (V
SO
= 5.0 V, V
SI
≥
1.5 V)
Sense Input Current
PREREGULATOR
Preregulator Output Voltage (I
Z
= 10
mA)
V
Z
−
6.3
−
V
V
SOth
V
SOth,hys
V
SOL
I
SOH
I
SI
1.16
20
−
−
−1.0
1.23
100
−
−
0.1
1.35
200
0.4
1.0
1.0
V
mV
V
mA
mA
t
ResD
t
ResR
V
ResL
I
ResH
V
CTth
V
CTth, hys
V
Resth
V
Resth,hys
50
50
55
−
−
−
−
−
100
−
100
5.0
−
−
2.0
100
200
300
180
30
0.4
1.0
−
−
ms
ms
V
mA
V
mV
−
4.5
−
V
mV
I
QSE
I
Q
Reg
line
Reg
load
I
Lim
105
−
−
−
200
100
150
−
400
−
260
5.0
mA
mA
−
−
1.0
8.0
20
30
mV
mV
mA
V
IO
Symbol
V
out
V
out
V
out
V
drop
−
−
−
−
0.1
0.2
0.3
0.2
0.25
0.40
0.50
0.4
V
Min
4.95
4.9
4.9
Typ
5.0
5.0
5.0
Max
5.05
5.1
5.1
Unit
V
V
V
V
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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3
NCV4949A
PIN FUNCTION DESCRIPTION
Pin
SO−8, SO−8 EP
1
2
3
4
5
6
7
8
−
Pin
SO−20 W
19
20
1
2
4−7, 14−17
10
11
12
3, 8, 9, 13, 18
Symbol
V
CC
S
I
V
Z
C
T
GND
Reset
S
O
V
out
NC
Supply Voltage
Input of Sense Comparator. If not used, connect to V
out
.
Output of Preregulator
Reset Delay Capacitor
Ground
Output of Reset Comparator
Output of Sense Comparator
Main Regulator Output
No Connect
Description
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4
NCV4949A
TYPICAL CHARACTERIZATION CURVES
60.0
50.0
ESR
(W)
40.0
30.0
20.0
10.0
Stable Region
0
0
10
20
30
40
50
60
70
80
90
100
0
0
10
20
30
40
50
60
0.1
Unstable Region
70
80
90
100
Unstable Region
V
in
= 13.5 V
C
out
= 10
mF
ESR
(W)
0.5
0.4
0.3
0.2
Stable Region
V
in
= 13.5 V
C
out
= 10
mF
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
Figure 2. ESR Stability Border Vs. Output
Current (Full ESR Range)
Figure 3. ESR Stability Border Vs. Output Current
(Very Low ESR)
5.04
Vout , OUTPUT VOLTAGE (V)
5.03
5.02
5.01
5
4.99
4.98
4.97
4.96
-40
6
Vout , OUTPUT VOLTAGE (V)
V
CC
= 14 V
I
out
= 1.0 mA
T
J
= 25°C
5
4
3
2
R
L
= 100
W
1
0
R
L
= 5 kW
-20
0
20
40
60
80
100
120
0
1
2
3
4
5
6
7
8
9
10
T
J
, JUNCTION TEMPERATURE (°C)
V
CC
, SUPPLY VOLTAGE (V)
Figure 4. Output Voltage versus
Junction Temperature
Figure 5. Output Voltage versus
Supply Voltage
250
Vdrop , DROPOUT VOLTAGE (mV)
Vdrop , DROPOUT VOLTAGE (mV)
T
J
= 25°C
200
150
100
0.40
I
out
= 100 mA
0.30
0.20
I
out
= 50 mA
I
out
= 10 mA
0.10
50
0
0.1
1.0
10
100
0
-40
-20
0
20
40
60
80
100
120
I
out
, OUTPUT CURRENT (mA)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 6. Dropout Voltage versus
Output Current
Figure 7. Dropout Voltage versus
Junction Temperature
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