CS8120
5.0 V, 300 mA Linear
Regulator with RESET
and ENABLE
The CS8120 is a 5.0 V, 300 mA precision linear regulator with two
microprocessor compatible control functions and protection circuitry
included on chip. The composite NPN−PNP output pass transistor
assures a lower dropout voltage (1.0 V @ 200 mA) without requiring
excessive supply current (2.5 mA).
The CS8120’s two logic control functions make this regulator well
suited to applications requiring microprocessor−based control at the
board or module level. ENABLE controls the output stage. A high
voltage (> 2.9 V) on the ENABLE lead turns off the regulator’s pass
transistor and sends the IC into Sleep mode where it draws only 250
mA.
The RESET function sends a RESET signal when the IC is powering up
or whenever the output voltage moves out of regulation. The RESET
signal is valid down to V
OUT
= 1.0 V.
The CS8120 design optimizes supply rejection by switching the
internal bandgap reference from the supply input to the regulator
output as soon as the nominal output voltage is achieved. Additional
on chip filtering enhances rejection of high frequency transients on all
external leads.
The CS8120 is fault protected against short circuit, over voltage and
thermal runaway conditions.
Features
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TO−220−5
T SUFFIX
CASE 314D
1
5
TO−220−5
TVA SUFFIX
CASE 314K
1
TO−220−5
THA SUFFIX
CASE 314A
1
5
D
2
PAK−5
DP SUFFIX
CASE 936AC
1
5
DIP−8
N SUFFIX
CASE 626
8
1
SO−14
D SUFFIX
CASE 751A
1
•
•
•
•
5.0 V
±4.0%
Output Voltage 300 mA
Low Dropout Voltage (1.0 V @ 150 mA)
Low Quiescent Current (2.5 mA @ I
OUT
= 150 mA)
mP
Compatible Control Functions
−
RESET
−
ENABLE
•
Low Current Sleep Mode
−
I
Q
= 250
mA
•
Fault Protection
−
Thermal Shutdown
−
Short Circuit
−
60 V Load Dump
14
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 10 of this data sheet.
©
Semiconductor Components Industries, LLC, 2004
1
January, 2004 − Rev. 8
Publication Order Number:
CS8120/D
CS8120
PIN CONNECTIONS
TO−220−5
V
OUT
Tab = GND
Pin 1. V
IN
2. ENABLE
3. GND
4. RESET
5. V
OUT
1
V
IN
NC
ENABLE
1
DIP−8
8
GND
SENSE
RESET
NC
Pin 1. V
IN
2. ENABLE
3. GND
4. RESET
5. V
OUT
1
D
2
PAK−5
V
IN
NC
NC
NC
ENABLE
NC
NC
1
SO−14
14
V
OUT
GND
SENSE
NC
RESET
NC
NC
V
OUT
V
IN
Over Voltage
Shutdown
Output
Current
Limit
−
+
Error
Amplifier
ENABLE
−
+
ENABLE
Comparator
Bandgap
Supply
V
REF
Thermal
Protection
To V
OUT
Bandgap
Reference
Reset
Comparator
+
−
GND
RESET
Figure 1. Block Diagram − TO−220−5
ABSOLUTE MAXIMUM RATINGS*
Rating
DC Input Voltage
Load Dump
Output Current
Electrostatic Discharge (Human Body Model)
Operating Temperature
Junction Temperature
Storage Temperature Range
Lead Temperature Soldering:
1. 10 second maximum.
2. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.
Wave Solder (through hole styles only) (Note 1)
Reflow (SMD styles only) (Note 2)
Value
−0.7 to 26
60
Internally Limited
2.0
−40 to +125
−40 to +150
−55 to +150
260 peak
230 peak
Unit
V
V
−
kV
°C
°C
°C
°C
°C
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2
CS8120
ELECTRICAL CHARACTERISTICS
(V
IN
= 14 V, I
OUT
= 5.0 mA; −40
≤
T
J
≤
150°C, −40°C
≤
T
C
≤
125°C,
unless otherwise noted.) Note 3
Characteristic
Output Stage
Output Voltage, V
OUT
Line Regulation
Load Regulation
Supply Voltage Rejection
Dropout Voltage
Quiescent Current
Protection Circuits
Short Circuit Current
Thermal Shutdown
Overvoltage Shutdown
RESET
RESET Saturation Voltage
RESET Output Leakage Current
Power ON/OFF RESET
Peak Output Voltage
RESET Threshold
HIGH (V
RH
)
LOW (V
RL)
RESET Threshold Hysteresis
ENABLE
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Current
7.0 V < V
IN
< 26 V
7.0 V < V
IN
< 26 V
7.0 V < V
IN
< 26 V
GND < V
IN(HI)
< V
OUT
−
1.1
0.4
−10
2.9
2.1
0.8
0
3.9
−
2.8
+10
V
V
V
mA
1.0 V < V
OUT
< V
RT(OFF)
,
3.1 kW Pull−Up to V
OUT
ENABLE = Low, V
OUT
> V
RT(ON)
,
V
RESET
= V
OUT
3.1 kW Pull−Up to V
OUT
−
−
−
0.1
0
0.7
0.4
25
1.0
V
mA
V
−
−
−
300
150
26
600
190
40
−
−
−
mA
°C
V
7.0 V
≤
V
IN
≤
26 V, 1.0 mA
≤
I
OUT
≤
300 mA
7.0 V
≤
V
IN
≤
26 V, I
OUT
= 200 mA
1.0 mA
≤
I
OUT
≤
300 mA
V
IN
= 14 V
DC
+ 1.0 V
RMS
@ 120Hz
LOAD
= 25
W
I
OUT
= 200 mA
ENABLE = High, V
IN
= 12 V
ENABLE = Low, I
OUT
= 200 mA
4.8
−
−
40
−
−
−
5.0
−
−
70
1.0
0.25
2.5
5.2
50
50
−
1.5
0.65
15
V
mV
mV
dB
V
mA
mA
Test Conditions
Min
Typ
Max
Unit
V
OUT
Increasing
V
OUT
Decreasing
−
−
4.75
10
V
OUT
− 0.10
V
OUT
− 0.14
40
V
OUT
− 0.04
−
−
V
V
mV
3. To have safe operating junction temperatures, low duty cycle pulse testing is used on tests where applicable.
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3
CS8120
PACKAGE LEAD DESCRIPTION
PACKAGE LEAD #
TO−220−5
1
2
3
4
DIP−8
2
4
8
6
SO−14
1
5
13
10
D
2
PAK−5
1
2
3
4
LEAD SYMBOL
V
IN
ENABLE
GND
RESET
FUNCTION
Supply voltage to IC, usually direct from the battery.
CMOS compatible logical input. V
OUT
is disabled i.e. placed
in a high impedance state when ENABLE is high.
Ground Connection.
CMOS compatible output lead. RESET goes low whenever
V
OUT
falls out of regulation. The RESET delay is externally
programmed.
Regulated output voltage, 5.0 V (Typ).
Kelvin Connection which allows remote sensing of output
voltage for improved regulation. If remote sensing is not de-
sired, connect to V
OUT.
No Connection.
5
N/A
1
7
14
12
5
−
V
OUT
SENSE
−
3, 5
2, 3, 4, 6,
7, 8, 9, 11
NC
TYPICAL PERFORMANCE CHARACTERISTICS
5.02
5.01
5.0 V @ 25°C
0
I
OUT
= 100 mA
−5
−10
Load Reg. (mV)
−15
−20
−25
−30
−35
−40
V
IN
= 14 V
125°C
40°C
25°C
5.0
V
OUT
(V)
4.99
4.98
4.97
4.96
4.95
−40
−20
0
20
40
60
80
100
120
140
150
−45
−50
0
100
200
300
I
OUT
(
mA
)
400
500
Junction Temperature (
°C
)
Figure 2. Output Voltage vs. Temperature
Figure 3. Load Regulation vs. Output
Current Over Temperature
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4
CS8120
TYPICAL PERFORMANCE CHARACTERISTICS
50
V
IN
= 7 to 25 V
1.4
1.2
1.0
0.8
25°C
−40°C
40
30
20
125°C
25°C
Dropout Voltage. (V)
Line Reg. (mV)
0.6
0.4
0.2
125°C
10
−40°C
0
−10
0
50
100
150
200
250
300
350
400
450
500
0.0
0
50
100
150
200
250
300
350
I
OUT
(mA)
Output Current (mA)
Figure 4. Line Regulation vs. Output
Current Over Temperature
3.5
V
IN
= 14 V
Figure 5. Dropout Voltage vs. Output
Current Over Temperature
5.5
5
22
20
V
OUT
3.0
Quiescent Current (mA)
−40°C
25°C
2.0
125°C
3
2
I
Q
12
8
4
0
1.5
1.0
1
0.5
0.0
0
0
50
100
150
200
250
300
350
0
2
4
6
8
10
Output Current (mA)
Supply Voltage (V)
Figure 6. Quiescent Current vs. Output
Current Over Temperature
2000
1800
Reset Output Voltage (mV)
1600
1400
1200
1000
800
600
400
200
0
1
5
10
15
20
25
V
IN
= 5.0 V
Figure 7. Output Voltage and Supply
Current vs. Input Voltage
30
35
40
Reset Output Current (mA)
Figure 8. RESET Output Voltage vs.
Output Voltage
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5
Supply Current (mA)
2.5
4
V
OUT
(V)
16