NCV4279C
5.0 V Micropower 150 mA
LDO Linear Regulator with
DELAY, Adjustable RESET,
and Monitor FLAG
The NCV4279C 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 130
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 an
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
8
1
SO−8
D SUFFIX
CASE 751
1
14
14
1
SO−14
D SUFFIX
CASE 751A
1
A
WL, L
Y
WW, W
= Assembly Location
= Wafer Lot
= Year
= Work Week
NCV4279C
AWLYWW
4279C
ALYW
PIN CONNECTIONS
V
IN
MON
R
ADJ
DELAY
SO−8
1
R
ADJ
DELAY
GND
GND
GND
NC
RESET
SO−14
14
MON
V
IN
GND
GND
GND
V
OUT
FLAG
1
8
V
OUT
FLAG
RESET
GND
•
•
•
•
•
•
5.0 V
±
2.0% Output
Low 130
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 SO−14 Package
•
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
©
Semiconductor Components Industries, LLC, 2004
1
July, 2004 − Rev. 0
Publication Order Number:
NCV4279C/D
NCV4279C
V
BAT
10
mF
NCV4279C
Delay
C
DELAY
V
IN
V
OUT
10
mF
R
ADJ
R
FLG
10 k
MON
R
RST
10 k
V
DD
FLAG
GND
RESET
I/O
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, SO−8:
Junction−to−Case, R
qJC
Junction−to−Ambient, R
qJA
Package Thermal Resistance, SO−14 (Fused) Minimum Pad Data:
Junction−to−Case, R
qJC
Junction−to−Ambient, R
qJA
Junction−to−Pin, R
qJP
(Note 3)
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
240 peak
°C
Unit
V
V
V
V
V
V
kV
°C
°C
°C/W
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
†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.
1. 60 second maximum above 183°C.
2. −5°C/+0°C allowable conditions.
3. Measured to Pin 4, with Pins 3, 4, 5, 10, 11 and 12 soldered to a thermal plane.
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Microprocessor
NCV4279C
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
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
130
4.0
12
300
190
180
5.10
5.15
600
150
30
60
200
6.0
19
−
−
−
V
V
mV
mV
mV
mV
mA
mA
mA
mA
mA
°C
Test Conditions
Min
Typ
Max
Unit
Dropout Voltage (V
IN
− V
OUT
)
Load Regulation
Line Regulation
Quiescent Current, (I
Q
)
Active Mode
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
)
Lower Delay Switching Threshold
(V
LD
)
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
1.0 V
≤
V
OUT
≤
V
RL
, R
RESET
= 10 k
−
−
4.55
4.50
4.70
4.60
0.98
×
V
OUT
0.97
×
V
OUT
V
V
−
1.4
0.3
0.1
1.8
0.45
0.4
2.2
0.6
V
V
V
V
OUT
< RESET Threshold Low(min)
DELAY = 1.0 V, V
OUT
> V
RH
DELAY = 1.0 V, V
OUT
= 1.5 V
−
−
6.0
5.0
1.23
−
9.0
−
1.31
0.1
15
−
1.39
V
mA
mA
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
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NCV4279C
PACKAGE PIN DESCRIPTION
Package Pin Number
SO−8
3
4
5
−
6
7
8
1
2
SO−14
1
2
3−5, 10−12
6
7
8
9
13
14
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.
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
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NCV4279C
TYPICAL PERFORMANCE CHARACTERISTICS
150
I
OUT
= 100
mA
145
140
I
Q
(mA)
T = 25°C
135
130
125
120
Dropout Voltage (mV)
450
400
350
300
+125°C
250
200
150
100
50
6
10
14
V
IN
(V)
18
22
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
1000
Unstable Region
1000
Unstable Region
100
C
VOUT
= 10
mF
C
VOUT
= 0.1
mF
ESR (W)
10
100
ESR (W)
10
Stable Region
1
Stable Region
0.1
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
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