SG7900A/SG7900 SERIES
05/01 Rev 1.5
L
INFINITY
Microelectronics Inc.
Copyright
1999
11861 Western Avenue
Garden Grove, CA 92841
1
(714) 898-8121
FAX: (714) 893-2570
NEGATIVE FIXED VOLTAGE REGULATOR
The SG7900A/SG7900 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/SG7800, SG140 line of three
terminal regulators.
These units feature a unique band gap reference which allows the
SG7900A series to be specified with an output voltage tolerance of
1.5%.
The SG7900A versions also offer much improved line regulation character-
istics.
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 (SG7900 series) or a capacitor and
5mA minimum load (SG120 series) for satisfactory performance, ease of
application is assured.
Although designed as fixed-voltage regulators, the output voltage can be
increased 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.
These devices are available in hermetically sealed TO-257, TO-3, TO-39
and LCC package.
DESCRIPTION
FEATURES
Output voltage set internally to
1.5% on SG7900A
Output current to 1.5A
Excellent line and load regulation
Foldback current limiting
Thermal overload protection
Voltages available: -5V, -12V, -15V
Contact factory for other voltage options
Available in surface mount package
HIGH RELIABILITY FEATURES
- SG7900A/SG7900
Available to MIL-STD - 883
MIL-M38510/11501BXA - JAN7905T
MIL-M38510/11505BYA - JAN7905K
MIL-M38510/11502BXA - JAN7912T
MIL-M38510/11506BYA - JAN7912K
MIL-M38510/11503BXA - JAN7915T
MIL-M38510/11507BYA - JAN7915K
LMI level "S" processing available
SCHEMATIC DIAGRAM
SG7900A/SG7900
**
**
For normal
operation the (V
OS
)
Sense Pin must be
externally
connected to the
load.
SG7900A/SG7900 SERIES
05/01 Rev 1.5
L
INFINITY
Microelectronics Inc.
Copyright
1999
11861 Western Avenue
Garden Grove, CA 92841
2
(714) 898-8121
FAX: (714) 893-2570
ABSOLUTE MAXIMUM RATINGS
(Note 1)
NEGATIVE REGULATOR
Device
Input Voltage Differential
Output Voltage
Input Voltage
(Output shorted to ground)
-5V
-35V
35V
-12V
-35V
35V
-15V
-40V
35V
150
C
-65
C to 150
C
300
C
Operating Junction Temperature
Hermetic (K, T, IG & L - Packages) ........................
Storage Temperature Range ..........................
Lead Temperature (Soldering, 10 Seconds) .................
Note 1. Values beyond which damage may occur.
THERMAL DATA
K Package:
Thermal Resistance-
Junction to Case
,
JC
................. 3.0C/W
Thermal Resistance-
Junction to Ambient
,
JA
............... 35C/W
T Package:
Thermal Resistance-
Junction to Case
,
JC
.................. 15C/W
Thermal Resistance-
Junction to Ambient
,
JA
............ 120C/W
IG Package:
Thermal Resistance-
Junction to Case
,
JC
................. 3.5C/W
Thermal Resistance-
Junction to Ambient
,
JA
.............. 42C/W
L Package:
Thermal Resistance-
Junction to Case
,
JC
.................. 35C/W
Thermal Resistance-
Junction to Ambient
,
JA
............ 120C/W
Note A. Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
JA
).
Note B. The above numbers for
JC
are maximums for the limiting thermal
resistance of the package in a standard mounting configuration.
The
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.
FIGURE 1.
MAXIMUM AVERAGE POWER DISSIPATION
FIGURE 2.
QUIESCENT CURRENT VS. LOAD
FIGURE 3.
TEMPERATURE COEFFICIENT
Note 2. Range over which the device is functional.
CHARACTERISTIC CURVES
-55
C to 150
C
Operating Junction Temperature Range:
SG7900A/7900 .............................................
RECOMMENDED OPERATING CONDITIONS
(Note 2)
SG7900A/SG7900 SERIES
05/01 Rev 1.5
L
INFINITY
Microelectronics Inc.
Copyright
1999
11861 Western Avenue
Garden Grove, CA 92841
3
(714) 898-8121
FAX: (714) 893-2570
FIGURE 6.
SHORT CIRCUIT CURRENT VS. V
IN
CHARACTERISTIC CURVES
(continued)
FIGURE 4.
SHORTCIRCUIT CURRENT VS. V
IN
FIGURE 5.
QUIESCENT 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 electrolytics 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
NOTE: C3 optional for improved transient response and ripple rejec
R
2
=
V(REG)
15mA
V
OUT
= V (REGULATOR)
R
1
+ R
2
R
1
NEGATIVE REGULATOR
SG7900A/SG7900 SERIES
05/01 Rev 1.5
L
INFINITY
Microelectronics Inc.
Copyright
1999
11861 Western Avenue
Garden Grove, CA 92841
4
(714) 898-8121
FAX: (714) 893-2570
-5.0V NEGATIVE REGULATOR
ELECTRICAL SPECIFICATIONS
(Note 1)
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7905A/SG7905 with -55
C
T
A
150
C,
V
IN
= -10V, I
O
= 500mA for the K and IG -Power Packages-, I
O
= 100mA for the T and L packages, C
IN
= 2
F, and C
OUT
= 1.0
F. Low duty cycle pulse
testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
SG7905A/SG7905
Units
SG7905
Min.
Typ. Max.
Min.
Typ. Max.
SG7905A
-5.0
3
1
15
15
5
-5.00
-5.00
1.1
25
20
175
Test Conditions
Parameter
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Total Output Voltage
Tolerance
Quiescent Current
Quiescent Current Change
Dropout Voltage
Peak Output Current
Short Circuit Current
Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown
-4.8
-4.70
-4.70
1.5
0.5
54
V
mV
mV
mV
mV
mV
V
V
mA
mA
mA
mA
mA
V
A
A
A
A
dB
V/V
mV
C
-5.2
50
25
100
25
100
-5.30
-5.30
2.5
2.0
1.3
0.5
0.5
2.3
3.3
1.4
1.2
0.6
80
-5.08
25
12
75
25
30
-5.15
-5.15
2.5
2.0
1.3
0.5
0.5
2.3
3.3
1.4
1.2
0.6
80
-5.00
5
3
15
15
5
-5.00
-5.00
1.1
25
20
175
-4.92
-4.85
-4.85
1.5
0.5
54
T
J
= 25C
V
IN
= -7.5V to -25V, T
J
= 25C
V
IN
= -8V to -12V, T
J
= 25
C
Power Pkgs: I
O
= 5mA to 1.5A, T
J
= 25C
I
O
= 250mA to 750mA, T
J
= 25C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25C
V
IN
= -8V to -20V
Power Pkgs: I
O
= 5mA to 1.0A, P
20W
T - Pkg: I
O
= 5mA to 500mA, P
2W
Over Temperature Range
T
J
= 25C
with Line: V
IN
= -8V to -25V
with Load: I
O
= 5mA to 1.0A (Power Packages)
I
O
= 5mA to 500mA (T)
V
O
= 100mV, T
J
= 25C
Power Pkgs: I
O
= 1.0A, T - Pkg: I
O
= 500mA
Power Pkgs: T
J
= 25C
T - Pkg: T
J
= 25C
Power Pkgs: V
IN
= -35V, T
J
= 25C
T - Pkg: V
IN
= -35V, T
J
= 25C
V
IN
= 10V, f = 120Hz, T
J
= 25C
f = 10Hz to 100KHz
(Note 2)
1000hrs. at T
J
= 125C
I
O
= 5mA
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.
SG7900A/SG7900 SERIES
05/01 Rev 1.5
L
INFINITY
Microelectronics Inc.
Copyright
1999
11861 Western Avenue
Garden Grove, CA 92841
5
(714) 898-8121
FAX: (714) 893-2570
-12V NEGATIVE REGULATOR
ELECTRICAL SPECIFICATIONS
(Note 1)
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7912A/SG7912 with -55
C
T
A
150
C,
V
IN
= -19V, I
O
= 500mA for the K and IG -Power Packages-, I
O
= 100mA for the T and L packages, C
IN
= 2
F, and C
OUT
= 1.0
F. Low duty cycle pulse
testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
SG7912A/SG7912
Units
SG7912
Min.
Typ. Max.
Min.
Typ. Max.
SG7912A
Test Conditions
Parameter
T
J
= 25C
V
IN
= -14.5V to -30V, T
J
= 25C
V
IN
= -16V to -22V, T
J
= 25
C
Power Pkgs: I
O
= 5mA to 1.5A, T
J
= 25C
I
O
= 250mA to 750mA, T
J
= 25C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25C
V
IN
= -14.5V to -27V
Power Pkgs: I
O
= 5mA to 1.0A, P
20W
T - Pkg: I
O
= 5mA to 500mA, P
2W
Over Temperature Range
T
J
= 25C
with Line: V
IN
= -14.5V to -30V
with Load: I
O
= 5mA to 1.0A (Power Packages)
I
O
= 5mA to 500mA (T)
V
O
= 100mV, T
J
= 25C
Power Pkgs: I
O
= 1.0A, T - Pkg: I
O
= 500mA
Power Pkgs: T
J
= 25C
T - Pkg: T
J
= 25C
Power Pkgs: V
IN
= -35V, T
J
= 25C
T - Pkg: V
IN
= -35V, T
J
= 25C
V
IN
= 10V, f = 120Hz, T
J
= 25C
f = 10Hz to 100KHz
(Note 2)
1000hrs. at T
J
= 125C
I
O
= 5mA
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Total Output Voltage
Tolerance
Quiescent Current
Quiescent Current Change
Dropout Voltage
Peak Output Current
Short Circuit Current
Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown
-11.8
-11.7
-11.7
1.5
0.5
54
-12.0
4
3
20
10
10
-12.0
-12.0
1.1
25
60
175
-12.2
60
30
90
40
40
-12.3
-12.3
4
3
1.0
0.5
0.5
2.3
3.3
1.4
1.2
0.6
80
-12.0
10
3
12
4
10
-12.0
-12.0
1.1
25
60
175
-12.5
120
60
120
60
240
-12.6
-12.6
4
3
1.0
0.5
0.5
2.3
3.3
1.4
0.2
0.6
80
-11.5
-11.4
-11.4
1.5
0.5
54
V
mV
mV
mV
mV
mV
V
V
mA
mA
mA
mA
mA
V
A
A
A
A
dB
V/V
mV
C
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.
SG7900A/SG7900 SERIES
05/01 Rev 1.5
L
INFINITY
Microelectronics Inc.
Copyright
1999
11861 Western Avenue
Garden Grove, CA 92841
6
(714) 898-8121
FAX: (714) 893-2570
-15V NEGATIVE REGULATOR
ELECTRICAL SPECIFICATIONS
(Note 1)
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7915A/SG7915 with -55
C
T
A
150
C,
V
IN
= -23V, I
O
= 500mA for the K and IG -Power Packages-, I
O
= 100mA for the T and L packages, C
IN
= 2
F, and C
OUT
= 1.0
F. Low duty cycle pulse
testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
SG7915A/SG7915
Units
SG7915
Min.
Typ. Max.
Min.
Typ. Max.
SG7915A
Test Conditions
Parameter
T
J
= 25C
V
IN
= -17.5V to -30V, T
J
= 25C
V
IN
= -20V to -25V, T
J
= 25
C
Power Pkgs: I
O
= 5mA to 1.5A, T
J
= 25C
I
O
= 250mA to 750mA, T
J
= 25C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25C
V
IN
= -18.5V to -30V
Power Pkgs: I
O
= 5mA to 1.0A, P
20W
T - Pkg: I
O
= 5mA to 500mA, P
2W
Over Temperature Range
T
J
= 25C
with Line: V
IN
= -18.5V to -30V
with Load: I
O
= 5mA to 1.0A (Power Packages)
I
O
= 5mA to 500mA (T)
V
O
= 100mV, T
J
= 25C
Power Pkgs: I
O
= 1.0A, T - Pkg: I
O
= 500mA
Power Pkgs: T
J
= 25C
T - Pkg: T
J
= 25C
Power Pkgs: V
IN
= -35V, T
J
= 25C
T - Pkg: V
IN
= -35V, T
J
= 25C
V
IN
= 10V, f = 120Hz, T
J
= 25C
f = 10Hz to 100KHz
(Note 2)
1000hrs. at T
J
= 125C
I
O
= 5mA
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Total Output Voltage
Tolerance
Quiescent Current
Quiescent Current Change
Dropout Voltage
Peak Output Current
Short Circuit Current
Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown
V
mV
mV
mV
mV
mV
V
V
mA
mA
mA
mA
mA
V
A
A
A
A
dB
V/V
mV
C
-15.6
150
75
150
75
240
-15.75
-15.75
4
3
1.0
0.5
0.5
2.3
3.3
1.4
1.2
0.6
80
-15.0
11
3
12
4
10
-15.00
-15.00
1.1
25
60
175
-14.4
-14.25
-14.25
1.5
0.5
54
-15.2
75
40
100
50
50
-15.4
-15.4
4
3
1.0
0.5
0.5
2.3
3.3
1.4
1.2
0.6
80
-15.0
5
3
30
4
10
-15.0
-15.0
1.1
25
60
175
-14.8
-14.6
-14.6
1.5
0.5
54
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.
SG7900A/SG7900 SERIES
05/01 Rev 1.5
L
INFINITY
Microelectronics Inc.
Copyright
1999
11861 Western Avenue
Garden Grove, CA 92841
7
(714) 898-8121
FAX: (714) 893-2570
CONNECTION DIAGRAMS & ORDERING INFORMATION
(See Notes Below)
NEGATIVE REGULATOR
Part No.
Package
Connection Diagram
3-TERMINAL TO-3
METAL CAN
K-PACKAGE
SG79XXAK/883B
-55C to 125C
SG7905AK/DESC
-55C to 125C
SG7912AK/DESC
-55C to 125C
SG7915AK/DESC
-55C to 125C
SG79XXAK
-55C to 125C
SG79XXK/883B
-55C to 125C
JAN7905K
-55C to 125C
JAN7912K
-55C to 125C
JAN7915K
-55C to 125C
SG79XXK
-55C to 125C
SG79XXK
0C to 125C
2
1
GROUND
CASE IS V
IN
V
OUT
Ambient
Temperature Range
3-PIN TO-39 METAL CAN
T-PACKAGE
SG79XXAT/883B
-55C to 125C
SG7905AT/DESC
-55C to 125C
SG7912AT/DESC
-55C to 125C
SG7915AT/DESC
-55C to 125C
SG79XXAT
-55C to 125C
SG79XXT/883B
-55C to 125C
JAN7905T
-55C to 125C
JAN7912T
-55C to 125C
JAN7915T
-55C to 125C
SG79XXT
-55C to 125C
3
2
V
IN
V
OUT
GROUND
1
CASE IS V
IN
3-PIN HERMETIC TO-257
IG-PACKAGE (Isolated)
SG79XXAIG/883B
-55C to 125C
SG7905AIG/DESC
-55C to 125C
SG7912AIG/DESC
-55C to 125C
SG7915AIG/DESC
-55C to 125C
SG79XXAIG
-55C to 125C
SG79XXIG/883B
-55C to 125C
SG79XXIG
-55C to 125C
GROUND
V
OUT
V
IN
20-PIN CERAMIC
LEADLESS CHIP CARRIER
L- PACKAGE
SG79XXL/883B
-55C to 125C
SG79XXL
-55C to 125C
SG7905AL/DESC
-55C to 125C
SG7912AL/DESC
-55C to 125C
SG7915AL/DESC
-55C to 125C
4
5
6
7
8
3
2
1
14
15
16
17
18
20 19
9
11 12 13
10
11. N.C.
12. N.C.
13. N.C.
14. N.C.
15. GND
16. N.C.
17. GND
18. N.C.
19. N.C.
20. V
IN
1. N.C.
2. V
IN
3. N.C.
4. V
O
5. V
O
6. N.C.
7. V
O
SENSE
8. N.C.
9. N.C.
10. N.C.
Note 1. Contact factory for JAN and DESC product availability.
2. All parts are viewed from the top.
3. "XX" to be replaced by output voltage of specific fixed regulator.
4. Some products will be available in hermetic flat pack (F). Consult factory for price and availability.
5. Both inputs and outputs must be externally connected together at the device terminals.
6. For normal operation, the V
O
SENSE pin must be externally connected to the load.
(See Notes 5 & 6)
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