SG7900A/SG7900 SERIES
05/01 Rev 1.5 LINFINITY 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 (VOS)
Sense Pin must be
externally
connected to the
load.
SG7900A/SG7900 SERIES
05/01 Rev 1.5 LINFINITY 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, θJC ................. 3.0°C/W
Thermal Resistance-Junction to Ambient, θJA ............... 35°C/W
T Package:
Thermal Resistance-Junction to Case, θJC .................. 15°C/W
Thermal Resistance-Junction to Ambient, θJA ............ 120°C/W
IG Package:
Thermal Resistance-Junction to Case, θJC ................. 3.5°C/W
Thermal Resistance-Junction to Ambient, θJA .............. 42°C/W
L Package:
Thermal Resistance-Junction to Case, θJC .................. 35°C/W
Thermal Resistance-Junction to Ambient, θJA ............ 120°C/W
Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).
Note B. The above numbers for θJC are maximums for the limiting thermal
resistance of the package in a standard mounting configuration.
The θJA 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 LINFINITY 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. VIN
CHARACTERISTIC CURVES (continued)
FIGURE 4.
SHORTCIRCUIT CURRENT VS. VIN
FIGURE 5.
QUIESCENT CURRENT VS. VIN
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
R2 = V(REG)
15mA
VOUT = V (REGULATOR)R1 + R2
R1
NEGATIVE REGULATOR
SG7900A/SG7900 SERIES
05/01 Rev 1.5 LINFINITY 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 ≤ TA ≤ 150°C,
VIN = -10V, IO = 500mA for the K and IG -Power Packages-, IO = 100mA for the T and L packages, CIN = 2µF, and COUT = 1.0µF. 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
µV/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
TJ = 25°C
VIN = -7.5V to -25V, TJ = 25°C
VIN = -8V to -12V, TJ = 25°C
Power Pkgs: I O = 5mA to 1.5A, TJ = 25°C
IO = 250mA to 750mA, TJ = 25°C
T - Pkg: IO = 5mA to 500mA, TJ = 25°C
VIN = -8V to -20V
Power Pkgs: IO = 5mA to 1.0A, P ≤ 20W
T - Pkg: IO = 5mA to 500mA, P ≤ 2W
Over Temperature Range
TJ = 25°C
with Line: VIN = -8V to -25V
with Load: IO = 5mA to 1.0A (Power Packages)
IO = 5mA to 500mA (T)
∆VO = 100mV, TJ = 25°C
Power Pkgs: IO = 1.0A, T - Pkg: IO = 500mA
Power Pkgs: TJ = 25°C
T - Pkg: TJ = 25°C
Power Pkgs: VIN = -35V, TJ = 25°C
T - Pkg: VIN = -35V, TJ = 25°C
∆VIN = 10V, f = 120Hz, TJ = 25°C
f = 10Hz to 100KHz (Note 2)
1000hrs. at TJ = 125°C
IO = 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 LINFINITY 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 ≤ TA ≤ 150°C,
VIN = -19V, IO = 500mA for the K and IG -Power Packages-, IO = 100mA for the T and L packages, CIN = 2µF, and COUT = 1.0µF. 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
TJ = 25°C
VIN = -14.5V to -30V, TJ = 25°C
VIN = -16V to -22V, TJ = 25°C
Power Pkgs: IO = 5mA to 1.5A, TJ = 25°C
IO = 250mA to 750mA, TJ = 25°C
T - Pkg: IO = 5mA to 500mA, TJ = 25°C
VIN = -14.5V to -27V
Power Pkgs: IO = 5mA to 1.0A, P ≤ 20W
T - Pkg: IO = 5mA to 500mA, P ≤ 2W
Over Temperature Range
TJ = 25°C
with Line: VIN = -14.5V to -30V
with Load: I O = 5mA to 1.0A (Power Packages)
IO = 5mA to 500mA (T)
∆VO = 100mV, TJ = 25°C
Power Pkgs: IO = 1.0A, T - Pkg: IO = 500mA
Power Pkgs: TJ = 25°C
T - Pkg: TJ = 25°C
Power Pkgs: VIN = -35V, TJ = 25°C
T - Pkg: VIN = -35V, TJ = 25°C
∆VIN = 10V, f = 120Hz, TJ = 25°C
f = 10Hz to 100KHz (Note 2)
1000hrs. at TJ = 125°C
IO = 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
µV/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 LINFINITY 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 ≤ TA ≤ 150°C,
VIN = -23V, IO = 500mA for the K and IG -Power Packages-, IO = 100mA for the T and L packages, CIN = 2µF, and COUT = 1.0µF. 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
TJ = 25°C
VIN = -17.5V to -30V, TJ = 25°C
VIN = -20V to -25V, TJ = 25°C
Power Pkgs: IO = 5mA to 1.5A, TJ = 25°C
IO = 250mA to 750mA, TJ = 25°C
T - Pkg: IO = 5mA to 500mA, TJ = 25°C
VIN = -18.5V to -30V
Power Pkgs: IO = 5mA to 1.0A, P ≤ 20W
T - Pkg: IO = 5mA to 500mA, P ≤ 2W
Over Temperature Range
TJ = 25°C
with Line: VIN = -18.5V to -30V
with Load: I O = 5mA to 1.0A (Power Packages)
IO = 5mA to 500mA (T)
∆VO = 100mV, TJ = 25°C
Power Pkgs: IO = 1.0A, T - Pkg: IO = 500mA
Power Pkgs: TJ = 25°C
T - Pkg: TJ = 25°C
Power Pkgs: VIN = -35V, TJ = 25°C
T - Pkg: VIN = -35V, TJ = 25°C
∆VIN = 10V, f = 120Hz, TJ = 25°C
f = 10Hz to 100KHz (Note 2)
1000hrs. at TJ = 125°C
IO = 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
µV/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 LINFINITY 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 -55°C to 125°C
SG7905AK/DESC -55°C to 125°C
SG7912AK/DESC -55°C to 125°C
SG7915AK/DESC -55°C to 125°C
SG79XXAK -55°C to 125°C
SG79XXK/883B -55°C to 125°C
JAN7905K -55°C to 125°C
JAN7912K -55°C to 125°C
JAN7915K -55°C to 125°C
SG79XXK -55°C to 125°C
SG79XXK 0°C to 125°C
2
1
GROUND
CASE IS VIN
VOUT
Ambient
Temperature Range
3-PIN TO-39 METAL CAN
T-PACKAGE SG79XXAT/883B -55°C to 125°C
SG7905AT/DESC -55°C to 125°C
SG7912AT/DESC -55°C to 125°C
SG7915AT/DESC -55°C to 125°C
SG79XXAT -55°C to 125°C
SG79XXT/883B -55°C to 125°C
JAN7905T -55°C to 125°C
JAN7912T -55°C to 125°C
JAN7915T -55°C to 125°C
SG79XXT -55°C to 125°C
32 VIN
VOUT
GROUND 1
CASE IS VIN
3-PIN HERMETIC TO-257
IG-PACKAGE (Isolated) SG79XXAIG/883B -55°C to 125°C
SG7905AIG/DESC -55°C to 125°C
SG7912AIG/DESC -55°C to 125°C
SG7915AIG/DESC -55°C to 125°C
SG79XXAIG -55°C to 125°C
SG79XXIG/883B -55°C to 125°C
SG79XXIG -55°C to 125°C
GROUND
VOUT
VIN
20-PIN CERAMIC
LEADLESS CHIP CARRIER
L- PACKAGE
SG79XXL/883B -55°C to 125°C
SG79XXL -55°C to 125°C
SG7905AL/DESC -55°C to 125°C
SG7912AL/DESC -55°C to 125°C
SG7915AL/DESC -55°C to 125°C
4
5
6
7
8
321
14
15
16
17
18
20 19
9 11121310
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. VIN
1. N.C.
2. VIN
3. N.C.
4. VO
5. VO
6. N.C.
7. VO 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 VO SENSE pin must be externally connected to the load.
(See Notes 5 & 6)
