CS8371
8.0 V/1.0 A, 5.0 V/250 mA
Dual Regulator
with Independent Output
Enables and NOCAPt
The CS8371 is an 8.0 V/5.0 V dual output linear regulator. The
8.0 V
±5.0%
output sources 1.0 A, while the 5.0 V
±5.0%
output
sources 250 mA. Each output is controlled by its own ENABLE lead.
Setting the ENABLE input high turns on the associated regulator
output. Holding both ENABLE inputs low puts the IC into sleep mode
where current consumption is less than 10
mA.
The regulator is protected against overvoltage, short−circuit and
thermal runaway conditions. The device can withstand 45 V load dump
transients making suitable for use in automotive environments. ON’s
proprietary NOCAP solution is the first technology which allows the
output to be stable without the use of an external capacitor.
The CS8371 is available in a 7 lead TO−220 package with copper
tab. The tab can be connected to a heatsink if necessary.
Features
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TO−220
SEVEN LEAD
T SUFFIX
CASE 821E
1
7
1
TO−220
SEVEN LEAD
TVA SUFFIX
CASE 821J
PIN CONNECTIONS AND
MARKING DIAGRAM
Tab = GND
Pin 1. ENABLE
1
2. ENABLE
2
3. V
OUT2
4. GND
5. Sense
6. V
CC
7. V
OUT1
•
Two Regulated Outputs
−
8.0 V
±5.0%;
1.0 A
−
5.0 V
±5.0%;
250 mA
•
Independent ENABLE for Each Output
•
Seperate Sense Feedback Lead for 8.0 V Output
•
< 10
mA
Sleep Mode Current
•
Fault Protection
−
Overvoltage Shutdown
−
+45 V Peak Transient Voltage
−
Short Circuit
−
Thermal Shutdown
•
CMOS Compatible, Low Current ENABLE Inputs
•
Pb−Free Packages are Available*
CS
8371
AWLYWWG
CS
8371
AWLYWWG
A
WL
Y
WW
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
ORDERING INFORMATION
Device
CS8371ET7
CS8371ET7G
Package
TO−220
STRAIGHT
TO−220
STRAIGHT
(Pb−Free)
TO−220
VERTICAL
TO−220
VERTICAL
(Pb−Free)
Shipping
50 Units/Rail
50 Units/Rail
CS8371ETVA7
CS8371ETVA7G
50 Units/Rail
50 Units/Rail
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 12
Publication Order Number:
CS8371/D
CS8371
V
CC
Overvoltage
Shutdown
V
OUT1
Current Limit
ENABLE
1
−
+
1.2 V
Pre−Regulator
Bias Generator
+
−
Sense
NOCAP
Trimmed Bandgap
Voltage Reference
Thermal
Shutdown
ENABLE
2
−
+
1.2 V
−
+
V
OUT2
Current Limit
GND
Figure 1. Block Diagram
MAXIMUM RATINGS
Rating
Power Dissipation
ENABLE Input Voltage Range
Load Current (8.0 V Regulator)
Load Current (5.0 V Regulator)
Transient Peak Voltage (31 V Load Dump @ 14 V V
CC
)
Storage Temperature Range
Junction Temperature Range
Lead Temperature Soldering: Wave Solder (through hole styles only) (Note 1)
Value
Internally Limited
−0.6 to +10
Internally Limited
Internally Limited
45
−65 to +150
−40 to +150
260 peak
Unit
−
V
−
−
V
°C
°C
°C
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. 10 second maximum.
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2
CS8371
ELECTRICAL CHARACTERISTICS:
(−40°C
≤
T
A
≤
+85°C, 10.5 V
≤
V
CC
≤
16 V, ENABLE
1
= ENABLE
2
= 5.0 V,
I
OUT1
= I
OUT2
= 5.0 mA, unless otherwise stated.)
Characteristic
PRIMARY OUTPUT (V
OUT1
)
Output Voltage
Line Regulation
Load Regulation
Sleep Mode Quiescent Current
Quiescent Current
Dropout Voltage
Quiescent Bias Current
I
OUT1
= 1.0 A
10.5 V
≤
V
CC
≤
26 V
5.0 mA
≤
I
OUT1
≤
1.0 A
V
CC
= 14 V, ENABLE
1
= ENABLE
2
= 0 V
V
CC
= 14 V, I
OUT1
= 1.0 A, I
OUT2
= 250 mA
I
OUT1
= 250 mA
I
OUT1
= 1.0 A
I
OUT1
= 5.0 mA, ENABLE
2
= 0 V, V
CC
= 14 V,
I
Q
= I
CC
− I
OUT1
I
OUT1
= 1.0 A, ENABLE
2
= 0 V, V
CC
= 14 V,
I
Q
= I
CC
− I
OUT1
f = 120 Hz, V
CC
= 14 V with 1.0 V
PP
AC, C
OUT
= 0
mF
f = 10 kHz, V
CC
= 14 V with 1.0 V
PP
AC, C
OUT
= 0
mF
f = 20 kHz, V
CC
= 14 V with 1.0 V
PP
AC, C
OUT
= 0
mF
V
CC
= 16 V
5.0 mA
≤
I
REG1
≤
1.0 A
10 Hz − 100 kHz
7.60
−
−
0
−
−
−
−
8.00
−
−
0.2
−
−
−
−
−
8.40
50
150
10.0
30
1.2
1.5
10
22
V
mV
mV
mA
mA
V
V
mA
mA
Test Conditions
Min
Typ
Max
Unit
Ripple Rejection
−
−
−
1.1
−
−
90
74
68
−
−
300
−
−
−
2.5
6.0
−
dB
dB
dB
A
V
mV
rms
Current Limit
Overshoot Voltage
Output Noise
SECONDARY OUTPUT (V
OUT2
)
Output Voltage
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Bias Current
I
OUT2
= 250 mA
7.0 V
≤
V
CC
≤
26 V
5.0 mA
≤
I
OUT2
≤
250 mA
I
OUT2
= 5.0 mA
I
OUT2
= 250 mA
I
OUT2
= 5.0 mA, ENABLE1 = 0 V, V
CC
= 14 V,
I
Q
= I
CC
− I
OUT2
I
OUT2
= 250 mA, ENABLE1 = 0 V, V
CC
= 14 V,
I
Q
= I
CC
− I
OUT2
f = 120 Hz, V
CC
= 14 V with 1.0 V
PP
AC, C
OUT
= 0
mF
f = 10 kHz, V
CC
= 14 V with 1.0 V
PP
AC, C
OUT
= 0
mF
f = 20 kHz, V
CC
= 14 V with 1.0 V
PP
AC, C
OUT
= 0
mF
V
CC
= 16 V
5.0 mA
≤
I
REG2
≤
250 mA
10 Hz − 100 kHz
4.75
−
−
−
−
−
5.00
−
−
−
−
−
−
5.25
40
100
2.2
2.5
7.0
8.0
V
mV
mV
V
V
mA
mA
Ripple Rejection
−
−
−
270
−
−
90
75
67
−
−
170
−
−
−
600
4.3
−
dB
dB
dB
mA
V
mV
rms
Current Limit
Overshoot Voltage
Output Noise
ENABLE FUNCTION (ENABLE)
Input Current
Input Voltage
PROTECTION CIRCUITRY
ESD Threshold
Overvoltage Shutdown
Thermal Shutdown
Thermal Hysteresis
V
CC
= 14 V, 0 V
≤
ENABLE
≤
5.5 V
Low
High
−150
0
2.0
−
−
−
150
0.8
5.0
mA
V
V
Human Body Model
−
Guaranteed by Design
−
±2.0
24
150
−
±4.0
−
180
30
−
30
−
−
kV
V
°C
°C
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3
CS8371
PACKAGE PIN DESCRIPTION
PACKAGE LEAD #
7 Lead TO−220
1
2
3
4
5
6
7
LEAD SYMBOL
ENABLE
1
ENABLE
2
V
OUT2
GND
Sense
V
CC
V
OUT1
FUNCTION
ENABLE control for the 8.0 V, 1.0 A output.
ENABLE control for the 5.0 V, 250 mA output.
5.0 V
±5.0%,
250 mA regulated output.
Ground.
Sense feedback for the primary 8.0 V output.
Supply voltage, usually from battery.
8.0 V
±5.0%,
1.0 A regulated output.
TYPICAL PERFORMANCE CHARACTERISTICS
8.05
8.04
8.03
Output Voltage (V)
8.02
8.01
8.00
7.99
7.98
7.97
7.96
7.95
−40 −20
0
20
40
60
80
100
120
140
V
IN
= 14 V
I
OUT
= 1.0 A
5.00
Output Voltage (V)
4.95
V
IN
= 14 V
I
OUT
= 250 mA
4.90
4.85
−40 −20
0
20
40
60
80
100 120
140
Ambient Temperature (°C)
Ambient Temperature (°C)
Figure 2. Regulator 1 Output Voltage
2.0
1.8
1.6
Dropout Voltage (V)
Dropout Voltage (V)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
100 200 300 400 500 600
700 800 900 1000
25°C
−40°C
85°C
Figure 3. Regulator 2 Output Voltage
2.5
2.0
−40°C
1.5
25°C
85°C
1.0
0.5
0
0
50
100
150
200
250
Output Current (mA)
Output Current (mA)
Figure 4. Regulator 1 Dropout Voltage
Figure 5. Regulator 2 Dropout Voltage
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4
CS8371
TYPICAL PERFORMANCE CHARACTERISTICS
10
9
Reg 1 Output Voltage (V)
8
7
6
5
4
3
2
1
0
0
1
2
3
V
IN
= 14 V
T
A
= 25°C
10
9
Reg 2 Output Voltage (V)
8
7
6
5
4
3
2
1
0
0
100
200
300
400
500
V
IN
= 14 V
T
A
= 25°C
Reg 1 Output Current (A)
Reg 2 Output Current (mA)
Figure 6. Regulator 1 Current Limit
9.0
8.5
Quiescent Current (mA0
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
−40
−20
0
20
40
60
80
Enable 1 = 5.0 V
Enable 2 = 5.0 V
V
IN
= 14 V
I
OUT1
= 1.0 A
I
OUT2
= 250 mA
Figure 7. Regulator 2 Current Limit
1.0
0.9
Quiescent Current (mA)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
−40
−20
0
20
40
60
80
Enable 1 = 0 V
Enable 2 = 0 V
V
IN
= 14 V
Ambient Temperature (°C)
Ambient Temperature (°C)
Figure 8. Quiescent Current
6.0
5.5
Quiescent Current (mA)
5.0
4.5
I
OUT
= 5.0 mA
I
OUT
= 1.0 A
Enable 1 = 5.0 V
Enable 2 = 0 V
V
IN
= 14 V
Figure 9. Quiescent Current
4.0
3.8
Quiescent Current (mA)
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
I
OUT
= 5.0 mA
I
OUT
= 250 mA
Enable 1 = 0 V
Enable 2 = 5.0 V
V
IN
= 14 V
4.0
3.5
3.0
−40
−20
0
20
40
60
80
2.0
−40
−20
0
20
40
60
80
Ambient Temperature (°C)
Ambient Temperature (°C)
Figure 10. Regulator 1 Quiescent Current
Figure 11. Regulator 2 Quiescent Current
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