Datasheet SG7900A, SG7900 Datasheet (LINFINITY)

SG7900A/SG7900 SERIES

NEGATIVE FIXED VOLTAGE REGULATOR

SG7900A/SG7900

DESCRIPTION

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 character­istics.

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.

FEATURES

••

•

Output voltage set internally to

••

••

• 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

••

±±

±1.5% on SG7900A

±±

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

**

**

For normal
operation the (VOS)
Sense Pin must be
externally
connected to the
load.

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SG7900A/SG7900 SERIES

ABSOLUTE MAXIMUM RATINGS (Note 1)

Device Input Voltage Differential

Output Voltage Input Voltage (Output shorted to ground)

-5V -35V 35V

-12V -35V 35V

-15V -40V 35V

NEGATIVE REGULATOR

Operating Junction Temperature

Hermetic (K, T, IG & L - Packages) ........................

Note 1. Values beyond which damage may occur.

150°C

THERMAL DATA

K Package:

Thermal Resistance­Thermal Resistance-

T Package:

Junction to Case, θ
Junction to Ambient, θ

................. 3.0°C/W

JC

............... 35°C/W

JA

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

RECOMMENDED OPERATING CONDITIONS (Note 2)

Operating Junction Temperature Range:

SG7900A/7900 .............................................

Note 2. Range over which the device is functional.

-55°C to 150°C

CHARACTERISTIC CURVES

Storage Temperature Range ..........................

-65°C to 150°C

Lead Temperature (Soldering, 10 Seconds) .................

Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).
Note B. The above numbers for θ

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.

are maximums for the limiting thermal

JC

300°C

FIGURE 1.
MAXIMUM AVERAGE POWER DISSIPATION

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FIGURE 2.
QUIESCENT CURRENT VS. LOAD

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FIGURE 3.
TEMPERATURE COEFFICIENT

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SG7900A/SG7900 SERIES

CHARACTERISTIC CURVES (continued)

NEGATIVE REGULATOR

FIGURE 4.
SHORTCIRCUIT CURRENT VS. V

APPLICATIONS

IN

FIGURE 7.
DROPOUT CHARACTERISTICS

FIGURE 5.
QUIESCENT CURRENT VS. V

FIGURE 6.

IN

FIGURE 8.
RIPPLE REJECTION VS. FREQUENCY

SHORT CIRCUIT CURRENT VS. V

IN

FIGURE 9 - FIXED OUTPUT REGULATOR

NOTE: 1. C1 is required only if regulator is separated from rectifier filter.

NOTE: C3 optional for improved transient response and ripple rejec

FIGURE 10 - CIRCUIT FOR INCREASING OUTPUT VOLTAGE

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

V

= V (REGULATOR)

OUT

R1 + R

R

1

R2 =

V(REG)

15mA

2

protected from momentary input shorts. A high current diode

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SG7900A/SG7900 SERIES

-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
V

= -10V, IO = 500mA for the K and IG -Power Packages-, IO = 100mA for the T and L packages, CIN = 2µF, and C

IN

testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)

SG7905A/SG7905

Parameter

Output Voltage
Line Regulation

(Note 1)

Load Regulation (Note 1)

Total Output Voltage

Tolerance

Quiescent Current

Test Conditions

TJ = 25°C

= -7.5V to -25V, TJ = 25°C

V

IN

V

= -8V to -12V, TJ = 25°C

IN

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

= -8V to -20V

V

IN

Power Pkgs: I
T - Pkg: IO = 5mA to 500mA, P ≤ 2W

= 5mA to 1.0A, P ≤ 20W

O

Over Temperature Range

SG7905A

Min. Typ. Max.

-5.08

-5.00

-4.92
5
3

15
15

5

-5.15

-5.00

-4.85

-5.15

-5.00

-4.85

TJ = 25°C

Quiescent Current Change

Dropout Voltage
Peak Output Current
Short Circuit Current

with Line: V
with Load: I

∆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

= -8V to -25V

IN

= 5mA to 1.0A (Power Packages)

O

IO = 5mA to 500mA (T)

1.1

1.5

0.5

T - Pkg: VIN = -35V, TJ = 25°C

Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown

∆VIN = 10V, f = 120Hz, TJ = 25°C
f = 10Hz to 100KHz (Note 2)
1000hrs. at TJ = 125°C
IO = 5mA

54

25
20

175

= 1.0µF. Low duty cycle pulse

OUT

SG7905

Min. Typ. Max.

-5.0

-4.8
25
12
75
25
30

-4.70

-4.70

3

1
15
15

5

-5.00

-5.00

2.5

2.0

1.3

0.5

0.5

2.3

3.3

1.4

1.1

1.5

0.5

1.2

0.6
54

80

25
20

175

≤ 150°C,

A

-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

Units

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.

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SG7900A/SG7900 SERIES

-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
V

= -19V, IO = 500mA for the K and IG -Power Packages-, IO = 100mA for the T and L packages, CIN = 2µF, and C

IN

testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)

SG7912A/SG7912

Parameter

Output Voltage
Line Regulation

(Note 1)

Load Regulation (Note 1)

Total Output Voltage

Tolerance

Quiescent Current

Test Conditions

= 25°C

T

J

= -14.5V to -30V, TJ = 25°C

V

IN

V

= -16V to -22V, TJ = 25°C

IN

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

= -14.5V to -27V

V

IN

Power Pkgs: I
T - Pkg: IO = 5mA to 500mA, P ≤ 2W

= 5mA to 1.0A, P ≤ 20W

O

Over Temperature Range

SG7912A

Min. Typ. Max.

-11.8

-12.0

-12.2
4
3

20
10
10

-11.7

-12.0

-12.3

-11.7

-12.0

-12.3

TJ = 25°C

Quiescent Current Change

Dropout Voltage
Peak Output Current
Short Circuit Current

with Line: V
with Load: I

∆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

= -14.5V to -30V

IN

= 5mA to 1.0A (Power Packages)

O

IO = 5mA to 500mA (T)

1.1

1.5

0.5

T - Pkg: VIN = -35V, TJ = 25°C

Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown

∆VIN = 10V, f = 120Hz, TJ = 25°C
f = 10Hz to 100KHz (Note 2)
1000hrs. at TJ = 125°C
IO = 5mA

54

25
60

175

= 1.0µF. Low duty cycle pulse

OUT

SG7912

Min. Typ. Max.

-12.0

-11.5
60
30
90
40
40

-11.4

-11.4

10

3

12

4

10

-12.0

-12.0
4
3

1.0

0.5

0.5

2.3

3.3

1.4

1.1

1.5

0.5

1.2

0.6
54

80

25
60

175

≤ 150°C,

A

-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

Units

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.

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SG7900A/SG7900 SERIES

-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
V

= -23V, IO = 500mA for the K and IG -Power Packages-, IO = 100mA for the T and L packages, CIN = 2µF, and C

IN

testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)

SG7915A/SG7915

Parameter

Output Voltage
Line Regulation

(Note 1)

Load Regulation (Note 1)

Total Output Voltage

Tolerance

Quiescent Current

Test Conditions

= 25°C

T

J

= -17.5V to -30V, TJ = 25°C

V

IN

V

= -20V to -25V, TJ = 25°C

IN

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

= -18.5V to -30V

V

IN

Power Pkgs: I
T - Pkg: IO = 5mA to 500mA, P ≤ 2W

= 5mA to 1.0A, P ≤ 20W

O

Over Temperature Range

SG7915A

Min. Typ. Max.

-15.2

-15.0

-14.8
5
3

30

4

10

-15.4

-15.0

-14.6

-15.4

-15.0

-14.6

TJ = 25°C

Quiescent Current Change

Dropout Voltage
Peak Output Current
Short Circuit Current

with Line: V
with Load: I

∆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

= -18.5V to -30V

IN

= 5mA to 1.0A (Power Packages)

O

IO = 5mA to 500mA (T)

1.1

1.5

0.5

T - Pkg: VIN = -35V, TJ = 25°C

Ripple Rejection
Output Noise Voltage (rms)
Long Term Stability
Thermal Shutdown

∆VIN = 10V, f = 120Hz, TJ = 25°C
f = 10Hz to 100KHz (Note 2)
1000hrs. at TJ = 125°C
IO = 5mA

54

25
60

175

= 1.0µF. Low duty cycle pulse

OUT

SG7915

Min. Typ. Max.

-15.0

-14.4
75
40

100

50
50

-14.25

-14.25

11

3

12

4

10

-15.00

-15.00
4
3

1.0

0.5

0.5

2.3

3.3

1.4

1.1

1.5

0.5

1.2

0.6
54

80

25
60

175

≤ 150°C,

A

-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

Units

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.

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SG7900A/SG7900 SERIES

CONNECTION DIAGRAMS & ORDERING INFORMATION (See Notes Below)

NEGATIVE REGULATOR

3-TERMINAL TO-3
METAL CAN
K-PACKAGE

3-PIN TO-39 METAL CAN
T-PACKAGE

Part No.Package

Ambient

Temperature Range

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

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

Connection Diagram

GROUND

V

GROUND

V

OUT

OUT

CASE IS V

1

2

CASE IS V

IN

1

V

32

IN

IN

3-PIN HERMETIC TO-257
IG-PACKAGE (Isolated)

20-PIN CERAMIC
LEADLESS CHIP CARRIER
L- PACKAGE

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

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

Tab is V

IN

(See Notes 5 & 6)

1. N.C.

2. V

IN

3. N.C.

4. V

O

5. V

O

6. N.C.

7. VO SENSE

8. N.C.

9. N.C.

10. N.C.

4
5
6
7

8

321

9 11121310

20 19

V

OUT

V

IN

GROUND

18
17
16
15
14

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

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.

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