SG120
NEGATIVE FIXED VOLTAGE REGULATOR
DESCRIPTION
The SG120 series of negative regulators offer self-contained, fixed-voltage
capability with up to 1.5A of load current. With a variety of output voltages and four
package options this regulator series is an optimum complement to the SG7800A/
7800/120 line of three terminal regulators.
All protective features of thermal shutdown, current limiting, and safe-area control
have been designed into these units and since these regulators require only a
single output capacitor or a capacitor and 5mA minimum load for satisfactory
performance, ease of application is assured.
Although designed as fixed-voltage regulators, the output voltage can be in-
creased through the use of a simple voltage divider. The low quiescent drain
current of the device insures good regulation when this method is used, especially
for the SG120 series. Utilizing an improved Bandgap reference design, problems
have been eliminated that are normally associated with the zener diode refer-
ences, such as drift in output voltage and large changes in the line and load
regulation
These devices are available in TO-257 (hermetically sealed TO-220), both
isolated and non-isolated), TO-3, TO-39 and TO-66 power packages.
FEATURES
•
•
•
•
•
•
Output current to 1.5A
Excellent line and load regulation
Foldback current limiting
Thermal overload protection
Voltages available: -5V, -12V, -15V
Voltages Not Recommended For New
Designs: -5.2V, -8V, -18V, -20V
•
Contact factory for other voltage
options
HIGH RELIABILITY FEATURES
- SG120
♦
Available to MIL-STD - 883
♦
Radiation data available
♦
LMI level "S" processing available
SCHEMATIC DIAGRAM
11/91 Rev 1.4 6/97
Copyright
1997
1
11861
Western
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INF INITY
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∞
Garden Grove, CA 92841
∞
(714) 898-8121
FAX: (714) 893-2570
Microelectronics
Inc.
SG120
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Device
Output Voltage
-5V
-5.2V
-8V
-12V
-15V
-18V
-20V
Input Voltage
-35V
-35V
-35V
-35V
-40V
-40V
-40V
NEGATIVE REGULATOR
Input Voltage Differential
(Output shorted to ground)
35V
35V
35V
35V
35V
35V
35V
Operating Junction Temperature
Hermetic (K, R, IG - Packages) ................................... 150°C
Note 1. Values beyond which damage may occur.
Storage Temperature Range ........................... -65°C to 150°C
Lead Temperature (Soldering, 10 Seconds) ................. 300°C
THERMAL DATA
K Package:
Thermal Resistance-
Junction to Case
,
θ
JC
................. 3.0°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
............... 35°C/W
R Package:
Thermal Resistance-
Junction to Case
,
θ
JC
................. 5.0°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
.............. 40°C/W
T Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 15°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
............ 120°C/W
IG Package:
Thermal Resistance-
Junction to Case
,
θ
JC
................. 3.5°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
.............. 42°C/W
L Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 35°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
............ 120°C/W
Note A. Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JA
).
Note B. The above numbers for
θ
JC
are maximums for the limiting thermal
resistance of the package in a standard mounting configuration.
The
θ
JA
numbers are meant to be guidelines for the thermal
performance of the device/pc-board system. All of the above
assume no ambient airflow.
RECOMMENDED OPERATING CONDITIONS
(Note 2)
Operating Junction Temperature Range:
SG120 ........................................................... -55°C to 150°C
Note 2. Range over which the device is functional.
CHARACTERISTIC CURVES
FIGURE 1.
MAXIMUM AVERAGE POWER DISSIPATION
FIGURE 2.
QUIESCENT CURRENT VS. LOAD
FIGURE 3.
TEMPERATURE COEFFICIENT
11/91 Rev 1.4 6/97
Copyright
1997
2
11861
Western
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INF INITY
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∞
Garden Grove, CA 92841
∞
(714) 898-8121
FAX: (714) 893-2570
Microelectronics
Inc.
SG120
CHARACTERISTIC CURVES
(continued)
NEGATIVE REGULATOR
FIGURE 4.
SHORTCIRCUIT CURRENT VS. V
IN
FIGURE 5.
QUIESCENT CURRENT VS. V
IN
FIGURE 6.
SHORT CIRCUIT CURRENT VS. V
IN
FIGURE 7.
DROPOUT CHARACTERISTICS
FIGURE 8.
RIPPLE REJECTION VS. FREQUENCY
APPLICATIONS
FIGURE 9 - FIXED OUTPUT REGULATOR
FIGURE 10 - CIRCUIT FOR INCREASING OUTPUT VOLTAGE
NOTE: 1. C1 is required only if regulator is separated from rectifier filter.
2. Both C1 and C2 should be low E.S.R. types such as solid
tantalum. If aluminum electrolitics are used, at least 10 times
values shown should be selected.
3. If large output capacities are used, the regulators must be
protected from momentary input shorts. A high current diode
from output to input will suffice.
NOTE: C3 optional for improved transient response and ripple
rejection.
R + R
2
V(REG)
R
2
=
V
OUT
= V (REGULATOR)
1
R
1
15mA
11/91 Rev 1.4 6/97
Copyright
1997
3
11861
Western
L
INF INITY
Avenue
∞
Garden Grove, CA 92841
∞
(714) 898-8121
FAX: (714) 893-2570
Microelectronics
Inc.
SG120
ELECTRICAL CHARACTERISTICS
SG120-05
(Note 1)
-5.0V & -5.2V NEGATIVE REGULATOR
(Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG120-05 with -55°C
≤
T
A
≤
150°C, and
V
IN
= -10V, I
O
= 5mA, C
IN
= 2mF, C
OUT
= 1.0mF. Low duty cycle pulse testing techniques are used which maintains junction and case temperature equal
to the ambient temperature.)
Parameter
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Total Output Voltage
Tolerance
Quiescent Current
Quiescent Current Change
Test Conditions
T
J
= 25°C
V
IN
= -7V to -25V, T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.5A, T
J
= 25°C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25°C
V
IN
= -7.5V to -25V
Power Pkgs: I
O
= 5mA to 1.5A, P
≤
20W
T - Pkg: I
O
= 5mA to 500mA, P
≤
2W
V
IN
= -7V to -25V
With Line: V
IN
= -7V to -25V, T
J
= 25°C
With Load: T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.5A
T - Pkg: I
O
= 5mA to 500mA
∆V
O
= 100mV, T
J
= 25°C
Power Pkgs: I
O
= 1.0A, T - Pkg: I
O
= 500mA
Power Pkgs: T
J
= 25°C
T - Pkg: T
J
= 25°C
Power Pkgs: V
IN
= -35V, T
J
= 25°C
T - Pkg: V
IN
= -35V, T
J
= 25°C
∆V
IN
= 10V, f = 120Hz, T
J
= 25°C
f = 10Hz to 100KHz
(Note 2)
1000hrs. at T
J
= 125°C
I
O
= 5mA
SG120-05
Min. Typ. Max.
-4.9 -5.0 -5.1
10
25
50
75
30
50
-4.8
-4.8
-5.0
-5.0
-5.2
-5.2
2
0.4
0.4
0.4
1.1
1.5
0.5
2.3
3.3
1.4
1.2
0.6
80
Units
V
mV
mV
mV
V
V
mA
mA
mA
mA
V
A
A
A
A
dB
µV/V
mV
°C
Dropout Voltage
Peak Output Current
Short Circuit Current
Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown
SG120-5.2
54
25
20
175
(Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG120-5.2 with -55°C
≤
T
A
≤
150°C, and
V
IN
= -10V, I
O
= 5mA, C
IN
= 2mF, C
OUT
= 1.0mF. Low duty cycle pulse testing techniques are used which maintains junction and case temperature equal
to the ambient temperature.)
Parameter
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Total Output Voltage
Tolerance
Quiescent Current
Quiescent Current Change
Test Conditions
T
J
= 25°C
V
IN
= -7.2V to -25V, T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.5A, T
J
= 25°C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25°C
V
IN
= -7.7V to -25V
Power Pkgs: I
O
= 5mA to 1.5A, P
≤
20W
T - Pkg: I
O
= 5mA to 500mA, P
≤
2W
V
IN
= -7.2V to -25V
With Line: V
IN
= -7.2V to -25V, T
J
= 25°C
With Load: T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.5A
T - Pkg: I
O
= 5mA to 500mA
∆V
O
= 100mV, T
J
= 25°C
Power Pkgs: I
O
= 1.5A, T - Pkg: I
O
= 500mA
Power Pkgs: T
J
= 25°C
T - Pkg: T
J
= 25°C
Power Pkgs: V
IN
= -35V, T
J
= 25°C
T - Pkg: V
IN
= -35V, T
J
= 25°C
∆V
IN
= 10V, f = 120Hz, T
J
= 25°C
f = 10Hz to 100KHz
(Note 2)
1000hrs. at T
J
= 125°C
I
O
= 5mA
SG120-5.2
Min. Typ. Max.
-5.1 -5.2 -5.3
15
25
50
75
30
50
-5.0
-5.0
-5.2
-5.2
-5.4
-5.4
2
0.4
0.4
0.4
1.1
1.5
0.5
2.3
3.3
1.4
1.2
0.6
80
Units
V
mV
mV
mV
V
V
mA
mA
mA
mA
V
A
A
A
A
dB
µV/V
mV
°C
Dropout Voltage
Peak Output Current
Short Circuit Current
Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown
54
25
20
175
Note 1. All regulation tests are made at constant junction temperature with low duty cycle testing.
2. This test is guaranteed but is not tested in production.
11/91 Rev 1.4 6/97
Copyright
1997
4
11861
Western
L
INF INITY
Avenue
∞
Garden Grove, CA 92841
∞
(714) 898-8121
FAX: (714) 893-2570
Microelectronics
Inc.
SG120
ELECTRICAL CHARACTERISTICS
SG120-08
(Note 1)
-8V & -12V NEGATIVE REGULATOR
(Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG120-08 with -55°C
≤
T
A
≤
150°C, and
V
IN
= -14V, I
O
= 5mA, C
IN
= 1.0mF, C
OUT
= 1.0mF. Low duty cycle pulse testing techniques are used which maintains junction and case temperature equal
to the ambient temperature.)
Parameter
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Total Output Voltage
Tolerance
Quiescent Current
Quiescent Current Change
Test Conditions
T
J
= 25°C
V
IN
= -10.5V to -25V, T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.5A, T
J
= 25°C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25°C
V
IN
= -10.5V to -25V
Power Pkgs: I
O
= 5mA to 1.5A, P
≤
20W
T - Pkg: I
O
= 5mA to 500mA, P
≤
2W
V
IN
= -10.5V to -25V
With Line: V
IN
= -10.5V to -25V, T
J
= 25°C
With Load: T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.5A
T - Pkg: I
O
= 5mA to 500mA
∆V
O
= 100mV, T
J
= 25°C
Power Pkgs: I
O
= 1.0A, T - Pkg: I
O
= 500mA
Power Pkgs: T
J
= 25°C
T - Pkg: T
J
= 25°C
Power Pkgs: V
IN
= -35V, T
J
= 25°C
T - Pkg: V
IN
= -35V, T
J
= 25°C
∆V
IN
= 10V, f = 120Hz, T
J
= 25°C
f = 10Hz to 100KHz
(Note 2)
1000hrs. at T
J
= 125°C
I
O
= 5mA
SG120-8
Min. Typ. Max.
-7.8 -8.0 -8.2
10
25
20
80
10
25
-7.65 -8.00 -8.35
-7.65 -8.00 -8.35
2
0.4
0.4
0.4
1.1
1.5
0.5
2.3
3.3
1.4
1.2
0.6
80
Units
V
mV
mV
mV
V
V
mA
mA
mA
mA
V
A
A
A
A
dB
µV/V
mV
°C
Dropout Voltage
Peak Output Current
Short Circuit Current
Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown
SG120-12
54
25
32
175
(Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG120-12 with -55°C
≤
T
A
≤
150°C, and
V
IN
= -17V, I
O
= 5mA, C
IN
= 2.0mF, C
OUT
= 1.0mF. Low duty cycle pulse testing techniques are used which maintains junction and case temperature equal
to the ambient temperature.)
Parameter
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Total Output Voltage
Tolerance
Quiescent Current
Quiescent Current Change
Test Conditions
T
J
= 25°C
V
IN
= -14V to -32V, T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.0A, T
J
= 25°C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25°C
V
IN
= -14.5V to -32V
Power Pkgs: I
O
= 5mA to 1.0A, P
≤
20W
T - Pkg: I
O
= 5mA to 500mA, P
≤
2W
V
IN
= -14V to -32V
With Line: V
IN
= -14V to -32V, T
J
= 25°C
With Load: T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.0A
T - Pkg: I
O
= 5mA to 500mA
∆V
O
= 100mV, T
J
= 25°C
Power Pkgs: I
O
= 1.0A, T - Pkg: I
O
= 500mA
Power Pkgs: T
J
= 25°C
T - Pkg: T
J
= 25°C
Power Pkgs: V
IN
= -35V, T
J
= 25°C
T - Pkg: V
IN
= -35V, T
J
= 25°C
∆V
IN
= 10V, f = 120Hz, T
J
= 25°C
f = 10Hz to 100KHz
(Note 2)
1000hrs. at T
J
= 125°C
I
O
= 5mA
SG120-12
Min. Typ. Max.
-11.7 -12.0 -12.3
4
10
30
80
10
25
-11.5 -12.0 -12.5
-11.5 -12.0 -12.5
2
4
0.4
0.4
0.4
1.1
1.5
0.5
2.3
3.3
1.4
1.2
0.6
80
Units
V
mV
mV
mV
V
V
mA
mA
mA
mA
V
A
A
A
A
dB
µV/V
mV
°C
Dropout Voltage
Peak Output Current
Short Circuit Current
Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown
56
25
48
175
Note 1. All regulation tests are made at constant junction temperature with low duty cycle testing.
2. This test is guaranteed but is not tested in production.
11/91 Rev 1.4 6/97
Copyright
1997
5
11861
Western
L
INF INITY
Avenue
∞
Garden Grove, CA 92841
∞
(714) 898-8121
FAX: (714) 893-2570
Microelectronics
Inc.
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