NCV4279B
5.0 V Micropower 150 mA
LDO Linear Regulator with
DELAY, Adjustable RESET,
and Monitor FLAG
The NCV4279B is a 5.0 V precision micropower voltage regulator.
The output current capability is 150 mA.
The output voltage is accurate within
±2.0%
with a maximum
dropout voltage of 0.6 V at 150 mA. Low quiescent current is a feature
drawing only 90
mA
with a 100
mA
load. This part is ideal for any and
all battery operated microprocessor equipment.
Microprocessor control logic includes an active RESET (with
DELAY), and a FLAG monitor which can be used to provide an early
warning signal to the microprocessor of a potential impending RESET
signal. The use of the FLAG monitor allows the microprocessor to
finish any signal processing before the RESET shuts the
microprocessor down.
The active RESET circuit operates correctly at an output voltage as
low as 1.0 V. The RESET function is activated during the power up
sequence or during normal operation if the output voltage drops
outside the regulation limits.
The reset threshold voltage can be decreased by the connection of
external resistor divider to R
ADJ
lead.
The regulator is protected against reverse battery, short circuit, and
thermal overload conditions. The device can withstand load dump
transients making it suitable for use in automotive environments. The
device has also been optimized for EMC conditions.
Features
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MARKING DIAGRAMS
8
SOIC−8
D SUFFIX
CASE 751
1
14
SOIC−14
D SUFFIX
CASE 751A
1
20
SOIC−20 WB
DW SUFFIX
CASE 751D
1
1
A
= Assembly Location
L, WL = Wafer Lot
Y, YY
= Year
W, WW = Work Week
G
or G = Pb−Free Package
NCV4279B
AWLYYWWG
NCV4279B
AWLYWWG
4279B
ALYW
G
1
1
PIN CONNECTIONS
SOIC−8
V
IN
MON
R
ADJ
DELAY
1
SOIC−14
R
ADJ
DELAY
GND
GND
GND
NC
RESET
1
R
ADJ
DELAY
NC
GND
GND
GND
GND
NC
NC
RESET
14
MON
V
IN
GND
GND
GND
V
OUT
FLAG
20
MON
V
IN
NC
GND
GND
GND
GND
NC
V
OUT
FLAG
1
8
V
OUT
FLAG
RESET
GND
•
•
•
•
•
•
•
•
•
•
5.0 V
±
2.0% Output
Low 90
mA
Quiescent Current
Active RESET
Adjustable Reset
150 mA Output Current Capability
Fault Protection
−
+60 V Peak Transient Voltage
−
−15 V Reverse Voltage
−
Short Circuit
−
Thermal Overload
Early Warning through FLAG/MON Leads
Internally Fused Leads in SOIC−14 and SO−20WB Packages
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
Pb−Free Packages are Available
SO−20WB
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
©
Semiconductor Components Industries, LLC, 2006
1
May, 2005 − Rev. 3
Publication Order Number:
NCV4279B/D
NCV4279B
V
BAT
10
mF
V
IN
V
OUT
10
mF
R
ADJ
V
DD
NCV4279B
Delay
C
DELAY
MON
R
FLG
10 k
R
RST
10 k
FLAG
GND
RESET
I/O
Figure 1. Application Diagram
MAXIMUM RATINGS*
{
Rating
V
IN
(DC)
Peak Transient Voltage (46 V Load Dump @ V
IN
= 14 V)
Operating Voltage
V
OUT
(DC)
Voltage Range (RESET, FLAG)
Input Voltage Range (MON)
ESD Susceptibility (Human Body Model)
Junction Temperature, T
J
Storage Temperature, T
S
Package Thermal Resistance, SOIC−8:
Junction−to−Case, R
qJC
Junction−to−Ambient, R
qJA
Package Thermal Resistance, SOIC−14 (Fused) Minimum Pad Data:
Junction−to−Case, R
qJC
Junction−to−Ambient, R
qJA
Junction−to−Pin, R
qJP
(Note 3)
Package Thermal Resistance, SO−20WB (Fused) Minimum Pad Data:
Junction−to−Case, R
qJC
Junction−to−Ambient, R
qJA
Junction−to−Pin, R
qJP
(Note 4)
Lead Temperature Soldering: Reflow: (SMD styles only) (Notes 1, 2)
Value
−15 to 45
60
45
16
−0.3 to 10
−0.3 to 10
2.0
−40 to +150
−55 to 150
45
165
°C/W
15
110
33
°C/W
12
82
26
240 peak
°C
Unit
V
V
V
V
V
V
kV
°C
°C
°C/W
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. 60 second maximum above 183°C.
2. −5°C/+0°C allowable conditions.
3. Measured to pin 9.
4. Measured to pin 12.
*The maximum package power dissipation must be observed.
†During the voltage range which exceeds the maximum tested voltage of V
IN
, operation is assured, but not specified. Wider limits may apply.
Thermal dissipation must be observed closely.
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2
Microprocessor
I/O
NCV4279B
ELECTRICAL CHARACTERISTICS
(I
OUT
= 1.0 mA, −40°C
≤
T
J
≤
125°C; 6.0 V < V
IN
< 26 V; unless otherwise specified.)
Characteristic
Output Stage
Output Voltage
Dropout Voltage (V
IN
− V
OUT
)
Load Regulation
Line Regulation
Quiescent Current, (I
Q
)
Active Mode
9.0 V < V
IN
< 16 V, 100
mA
≤
I
OUT
≤
150 mA
6.0 V < V
IN
< 26 V, 100
mA
≤
I
OUT
≤
150 mA
I
OUT
= 150 mA
I
OUT
= 100
mA
V
IN
= 14 V, 5.0 mA
≤
I
OUT
≤
150 mA
[V
OUT
(typ) + 1.0] < V
IN
< 26 V, I
OUT
= 1.0 mA
I
OUT
= 100
mA,
V
IN
= 12 V, Delay = 3.0 V, MON = 3.0 V
I
OUT
= 75 mA, V
IN
= 14 V, Delay = 3.0 V, MON = 3.0 V
I
OUT
≤
150 mA, V
IN
= 14 V, Delay = 3.0 V, MON = 3.0 V
−
V
OUT
= 0 V
(Guaranteed by Design)
4.90
4.85
−
−
-30
−
−
−
−
151
40
150
5.0
5.0
400
100
5.0
15
90
4.0
12
300
190
180
5.10
5.15
600
150
30
60
125
6.0
19
−
−
−
V
mV
mV
mV
mA
Test Conditions
Min
Typ
Max
Unit
Current Limit
Short Circuit Output Current
Thermal Shutdown
Reset Function (RESET)
RESET Threshold
HIGH (V
RH
)
LOW (V
RL
)
Output Voltage Low (V
RLO
)
Delay Switching Threshold (V
DT
)
Reset Delay Low Voltage
Delay Charge Current
Delay Discharge Current
Reset Adjust Switching Voltage
(V
R(ADJ)
)
FLAG/Monitor
Monitor Threshold
Hysteresis
Input Current
Output Saturation Voltage
MON = 2.0 V
V
OUT
Increasing
V
OUT
Decreasing
mA
mA
°C
4.55
4.50
−
1.4
−
1.5
5.0
1.23
4.70
4.60
0.1
1.8
−
2.5
−
1.31
0.98
×
V
OUT
0.97
×
V
OUT
0.4
2.2
0.1
3.5
−
1.39
V
V
V
V
V
mA
mA
V
1.0 V
≤
V
OUT
≤
V
RL
, R
RESET
= 10 k
−
V
OUT
< RESET Threshold Low(min)
DELAY = 1.0 V, V
OUT
> V
RH
DELAY = 1.0 V, V
OUT
= 1.5 V
−
Increasing and Decreasing
−
1.10
20
−0.5
−
1.20
50
0.1
0.1
1.31
100
0.5
0.4
V
mV
mA
V
MON = 0 V, I
FLAG
= 1.0 mA
PACKAGE PIN DESCRIPTION
Package Pin Number
SOIC−8
3
4
5
−
6
7
8
1
2
SOIC−14
1
2
3−5, 10−12
6
7
8
9
13
14
SO−20WB
1
2
4−7, 14−17
3, 8, 9, 13, 18
10
11
12
19
20
Pin Symbol
R
ADJ
DELAY
GND
NC
RESET
FLAG
V
OUT
V
IN
MON
Function
Reset Adjust. If not needed connect to ground.
Timing capacitor for RESET function.
Ground. All GND leads must be connected to Ground
.
No connection.
Active reset (accurate to V
OUT
≥
1.0 V)
Open collector output from early warning comparator.
±2.0%,
150 mA output.
Input Voltage.
Monitor. Input for early warning comparator. If not needed connect to V
OUT.
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3
NCV4279B
TYPICAL PERFORMANCE CHARACTERISTICS
5.01
V
OUT
= 5.0 V
V
IN
= 14 V
I
OUT
= 5.0 mA
5.00
V
OUT
(V)
I
Q
(mA)
1.2
V
IN
= 12 V
1.0
0.8
0.6
0.4
0.2
4.98
−40 −25 −10
0
+125°C
+25°C
−40°C
4.99
5
20 35 50 65
Temperature (°C)
80
95 110 125
0
5
10
15
I
OUT
(mA)
20
25
Figure 2. Output Voltage vs. Temperature
Figure 3. Quiescent Current vs. Output Current
14
V
IN
= 12 V
12
10
I
Q
(mA)
8
6
−40°C
4
2
0
0
15
30
45
60 75 90
I
OUT
(mA)
105 120 135 140
7
T = 25°C
6
5
I
Q
(mA)
4
3
2
1
0
6
8
10
12
14
I
OUT
= 50 mA
I
OUT
= 100 mA
+125°C
+25°C
I
OUT
= 10 mA
16 18
V
IN
(V)
20
22
24
26
Figure 4. Quiescent Current vs. Output Current
Figure 5. Quiescent Current vs. Input Voltage
120
T = 25°C
100
80
I
Q
(mA)
60
49
20
0
Dropout Voltage (mV)
I
OUT
= 100
mA
450
400
350
300
+125°C
250
200
150
100
50
6
8
10
12
14
16 18
V
IN
(V)
20
22
24
26
0
0
25
50
75
I
OUT
(mA)
100
125
150
+25°C
−40°C
Figure 6. Quiescent Current vs. Input Voltage
Figure 7. Dropout Voltage vs. Output Current
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NCV4279B
TYPICAL PERFORMANCE CHARACTERISTICS
1000
Unstable Region
100
1000
Unstable Region
C
Vout
= 10
mF
C
Vout
= 0.1
mF
100
ESR (W)
ESR (W)
10
Stable Region
0.1
10
1
Stable Region
C
Vout
= 10
mF
1
0 10 20 30 40 50 60 70 80 90 100110120130140150
OUTPUT CURRENT (mA)
0.01
0
10
20
30
40
50
60
70
80
90
100 110
OUTPUT CURRENT (mA)
Figure 8. Output Capacitor ESR
Figure 9. Output Stability with Output
Capacitor Change
V
IN
Current Source
(Circuit Bias)
I
BIAS
Current Limit
Sense
V
OUT
R
ADJ
V
BG
RESET
+
+
−
I
BIAS
+ −
Error Amplifier
+
−
1.8 V
Thermal
Protection
V
BG
3.0
mA
Delay
I
BIAS
Bandgap
Reference
V
BG
+
V
BG
GND
I
BIAS
FLAG
MON
−
Figure 10. Block Diagram
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