SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
DESCRIPTION
The SG79xxA/SG79xx series of negative
regulators offer self-contained, fixed-
voltage capability with up to 1.5A of load
current and input voltage up to -30V. With
a variety of output voltages this regulator
series is an optimum complement to the
SG7800A/SG7800 positive three terminal
regulators.
These units feature a unique band gap
reference which allows the SG79xxA
series to be specified with an output
voltage tolerance of ±1.5%.
The SG79xxA 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 (SG79xx 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.
These devices are available in
hermetically sealed TO-257 (both case
grounded ‘G’ and isolated ‘IG’), TO-3, TO-
39 and LCC packages.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
Output Voltage Set Internally to
±1.5% on SG79xxA
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
- SG79xxA/SG79xx
Available to MIL-STD - 883, ¶ 1.2.1
MIL-M38510/11501BXA - JAN7905T
MIL-M38510/11505BYA - JAN7905K
MIL-M38510/11502BXA - JAN7912T
MIL-M38510/11506BYA - JAN7912K
MIL-M38510/11503BXA - JAN7915T
MIL-M38510/11507BYA - JAN7915K
MIL-M38510/11508BYA - JAN7924K
MSC-AMSG level "S" Processing Available
Available to DSCC
– Standard Microcircuit Drawing (SMD)
PRODUCT HIGHLIGHT
S
SG
G7
79
9X
XX
X
SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
ABSOLUTE MAXIMUM RATINGS
Device Output Voltage Input Voltage Input Voltage Differential
(Output Shorted to Ground)
-5V -35V 35V
-12V -35V 35V
-15V -40V 35V
Operating Junction Temperature ......................................................................................................................................................... 150°C
Storage Temperature Range ................................................................................................................................................. -65°C to 150°C
Lead Temperature (Soldering 10 seconds) .......................................................................................................................................... 300°C
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of
specified terminal.
THERMAL DATA
K TO-3 3-Pin Metal Can
THERMAL RESISTANCE-JUNCTION TO CASE, θJC 3.0°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJ
A
35°C/W
T TO-39 3-Pin Metal Ca n
THERMAL RESISTANCE-JUNCTION TO CASE, θJC 15°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJ
A
120°C/W
G TO-257 3-Pin Hermetic
THERMAL RESISTANCE-JUNCTION TO CASE, θJC 3.5°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJ
A
42°C/W
IG TO-257 3-Pin Hermetic (Isolated)
THERMAL RESISTANCE-JUNCTION TO CASE, θJC 4.0°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJ
A
42°C/W
L Leadless Chip Carrier 20-Pin Ceramic
THERMAL RESISTANCE-JUNCTION TO CASE, θJC 35°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJ
A
120°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJ
A
numbers are guidelines for the thermal perform ance of the device/pc-board system . All of the above assume no ambient airflow.
P
PA
AC
CK
KA
AG
GE
E
D
DA
AT
TA
A
SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
CHARACTERISTIC CURVES
Figure 1 – Maximum Average Power Dissipation
Figure 2 – Quiescent Current vs. Load
Figure 3 – Temperature Coefficient
Figure 4 – Short-circuit Current vs. VIN
G
GR
RA
AP
PH
HS
S
SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
CHARACTERISTIC CURVES
Figure 5 – Quiescent Current vs. VIN
Figure 6 – Short-circuit Current Vs. VIN
Figure 7 – Dropout Characteristics
Figure 8 – Ripple Rejection vs. Frequency
G
GR
RA
AP
PH
HS
S
SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
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 electrolytic
capacitors 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
rejection.
()
()
15mA
REGV
R
R
RR
REGULATORVV
2
1
21
OUT
=
+
=
RECOMMENDED OPERATING CONDITIONS
Parameter SG79xx
/
79xxA Units
Min Typ Max
Operating Junction Temperature Range (Note 2) -55 150 °C
Note 2: Range over which the device is functional.
A
AP
PP
PL
LI
IC
CA
AT
TI
IO
ON
NS
S
SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7905A / SG7905 with -55°C < TA <
125°C, VIN = -10V, IO = 500mA for the K, G, and IG – Power Packages, IO = 100mA for the T and L packages, CIN = 2µF, and COUT =
1µF. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.
Parameter Test Conditions SG7905A SG7905 Units
Min Typ Max Min Typ Max
Output Voltage TJ = 25°C -4.95 -5.00 -5.08 -4.80 -5.00 -5.20 V
Line Regulation (Note 1) VIN = -7.5V to -25V, TJ = 25°C 5 25 3 50 mV
V
IN = -8V to -12V, TJ = 25°C 3 12 1 25 mV
Load Regulation (Note 1) Power Pkgs: IO = 5mA to 1.5A, TJ = 25°C 15 75 15 100 mV
I
O = 250mA to 750mA, TJ = 25°C 15 25 15 25 mV
T – Pkg: IO = 5mA to 500mA, TJ = 250°C 5 30 5 100 mV
Total Output Voltage VIN = -8V to -20V
Tolerance Power Pkgs: IO = 5mA to 1.0A, P < 20W -4.85 -5.00 -5.15 -4.70 -5.00 -5.30 V
T – Pkg: IO =5mA to 500mA, P < 20W -4.85 -5.00 -5.15 -4.70 -5.00 -5.30 V
Quiescent Current Over Temperature Range 2.5 2.5 mA
T
J = 25°C 2.0 2.0 mA
Quiescent Current Change With Line: VIN = -8V to -25V 1.3 1.3 mA
With Load: IO = 5mA to 1.0A (Power Pkgs.) 0.5 0.5 mA
I
O = 5mA to 500mA (T) 0.5 0.5 mA
Dropout Voltage ∆VO = 100mV, TJ = 25°C
Power Pkgs: IO = 1.0A, T-Pkg: IO = 500mA 1.1 2.3 1.1 2.3 V
Peak Output Current Power Pkgs: TJ = 25°C 1.5 3.3 1.5 3.3 A
T – Pkg: TJ = 25°C 0.5 1.4 0.5 1.4 A
Short Circuit Current Power Pkgs: VIN = -35V, TJ = 25°C 1.2 1.2 A
T – Pkg: VIN = -35V, TJ = 25°C 0.6 0.6 A
Ripple Rejection ∆VIN = 10V, f = 120Hz, TJ = 25°C 54 54 dB
Output Noise Voltage (rms) f = 10Hz to 100kHz (Note 2) 25 80 25 80 µV/V
Long Term Stability 1000 hours @ TJ = 125°C 20 20 mV
Thermal Shutdown IO = 5mA 175 175 °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.
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7912A / SG7912 with -55°C < TA <
125°C, VIN = -19V, IO = 500mA for the K, G, and IG – Power Packages, IO = 100mA for the T and L packages, CIN = 2µF, and COUT =
1µF. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.
Parameter Test Conditions SG7912A SG7912 Units
Min Typ Max Min Typ Max
Output Voltage TJ = 25°C -11.8 -12.0 -12.2 -11.5 -12.0 -12.5 V
Line Regulation (Note 1) VIN = -14.5V to -30V, TJ = 25°C 4 60 10 120 mV
V
IN = -16V to -22V, TJ = 25°C 3 30 3 60 mV
Load Regulation (Note 1) Power Pkgs: IO = 5mA to 1.5A, TJ = 25°C 20 90 12 120 mV
I
O = 250mA to 750mA, TJ = 25°C 10 40 10 60 mV
T – Pkg: IO = 5mA to 500mA, TJ = 25°C 10 40 10 240 mV
Total Output Voltage VIN = -14.5V to -27V
Tolerance Power Pkgs: IO = 5mA to 1.0A, P < 20W -11.7 -12.0 -12.3 -11.4 -12.0 -12.6 V
T – Pkg: IO = 5mA to 500mA, P < 2W -11.7 -12.0 -12.3 -11.4 -12.0 -12.6 V
Quiescent Current Over Temperature Range 4 4 mA
T
J = 25°C 3 3 mA
Quiescent Current Change With Line: VIN = -14.5V to -30V 1.0 1.0 mA
With Load: IO = 5mA to 1.0A (Power Pkgs.) 0.5 0.5 mA
I
O = 5mA to 500mA (T) 0.5 0.5 mA
Dropout Voltage ∆VO = 100mV, TJ = 25°C
Power Pkgs: IO = 1.0A, T – Pkg: IO = 500mA 1.1 2.3 1.1 2.3 V
Peak Output Current Power Pkgs: TJ = 25°C 1.5 3.3 1.5 3.3 A
T – Pkg: TJ = 25°C 0.5 1.4 0.5 1.4 A
Short Circuit Current Power Pkgs: VIN = -35V, TJ = 25°C 1.2 0.2 A
T – Pkg: VIN = -35V, TJ = 25°C 0.6 0.6 A
Ripple Rejection ∆VIN = 10V, f = 120Hz, TJ = 25°C 54 54 dB
Output Noise Voltage (rms) f = 10Hz to 100kHz (note 2) 25 80 25 80 µV/V
Long Term Stability 1000 hours @ TJ = 125°C 60 60 mV
Thermal Shutdown IO = 5mA 175 175 °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.
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7915A / SG7915 with -55°C < TA <
125°C, VIN = -23V, IO = 500mA for the K, G, and IG – Power Packages, IO = 100mA for the T and L packages, CIN = 2µF, and COUT =
1µF. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.
Parameter Test Conditions SG7915A SG7915 Units
Min Typ Max Min Typ Max
Output Voltage TJ = 25°C -14.8 -15.0 -15.2 -14.4 -15.0 -15.6 V
Line Regulation (Note 1) VIN = -17.5V to -30V, TJ = 25°C 5 75 11 150 mV
V
IN = -20V to -25V, TJ = 25°C 3 40 3 75 mV
Load Regulation (Note 1) Power Pkgs: IO = 5mA to 1.5A, TJ = 25°C 30 100 12 150 mV
I
O = 250mA to 750mA, TJ = 25°C 4 50 4 75 mV
T – Pkg: IO = 5mA to 500mA, TJ = 25°C 10 50 10 240
Total Output Voltage VIN = -18.5V to -30V
Tolerance Power Pkgs: IO = 5mA to 1.0A, P < 20W -14.6 -15.0 -15.4 -14.25 -15.00 -15.75 V
T – Pkg: IO = 5mA to 500mA, P < 2W -14.6 -15.0 -15.4 -14.25 -15.00 -15.75 V
Quiescent Current Over Temperature Range 4 4 mA
T
J = 25°C 3 3 mA
Quiescent Current Change With Line: VIN = -18.5V to -30V 1.0 1.0 mA
With Load: IO = 5mA to 1.0A (Power Pkgs) 0.5 0.5 mA
I
O = 5mA to 500mA (T) 0.5 0.5 mA
Dropout Voltage ∆VO = 100mV, TJ = 25°C
Power Pkgs: IO = 1.0A, T – Pkg: IO = 500mA 1.1 2.3 1.1 2.3 V
Peak Output Current Power Pkgs: TJ = 25°C 1.5 3.3 1.5 3.3 A
T – Pkg: TJ = 25°C 0.5 1.4 0.5 1.4 A
Short Circuit Current Power Pkgs: VIN = -35V, TJ = 25°C 1.2 1.2 A
T – Pkg: VIN = -35V, TJ = 25°C 0.6 0.6 A
Ripple Rejection ∆VIN = 10V, f = 120Hz, TJ = 25°C 54 54 dB
Output Noise Voltage (rms) f = 10Hz to 100kHz (note 2) 25 80 25 80 µV/V
Long Term Stability 1000 hours @ TJ = 125°C 60 60 mV
Thermal Shutdown IO = 5mA 175 175
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.
NOTES
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
SG79xxA / SG79xx
PRODUCT DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
WWW.Microsemi .COM
Copyright © 1997
Rev. 1.6, 2010-07-16
Negative Fixed Voltage Regulator
TM ®
CONNECTION DIAGRAMS & ORDERING INFORMATION (SEE NOTES BELOW)
Package Part No.
Ambient
Temperature Range Connection Diagram
3-Terminal TO-3 Metal Can
K – Package
SG79xxAK/883B -55°C to 125°C
GND
VOUT
1
2
Case is VIN
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
3-Pin TO-39 Metal Can
T – Package
SG79xxAT/883B -55°C to 125°C
1
2 3
GND
VOUT VIN
Case is VIN
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
3-Pin Hermetic TO-257
IG – Package (Isolated)
SG79xxAIG/883B -55°C to 125°C
VOUT
GROUND
VIN
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
20-Pin Ceramic Leadless Chip
Carrier
L – Package
SG79xxL/883B -55°C to 125°C
N.C.
VIN
N.C.
VO
VO
N.C.
VO SENSE
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
GROUND
N.C.
GROUND
N.C.
VIN
N.C.
123
4
5
6
7
8
910111213
14
15
16
17
18
1920
See Notes 5 & 6
SG79xxL -55°C to 125°C
SG7905AL/DESC -55°C to 125°C
SG7912AL/DESC -55°C to 125°C
SG7912AL/DESC -55°C to 125°C
3-Pin Hermetic TO-257
G – Package (Case is VIN)
SG79xxAG/883B -55°C to 125°C
VOUT
GROUND
VIN
Case is VIN
SG7905AG/DESC -55°C to 125°C
SG7912AG/DESC -55°C to 125°C
SG7915AG/DESC -55°C to 125°C
SG79xxAG -55°C to 125°C
SG79xxG/883B -55°C to 125°C
SG79xxG -55°C to 125°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 externa lly connected to the load.
PRODUCTION DATA – Information contained in this document is proprietary to
Microsemi and is current as of publication date. This document may not be modified in
any way without the express written consent of Microsemi. Product processing does not
necessarily include testing of all parameters. Microsemi reserves the right to change the
configuration and performance of the product and to discontinue product at any time.
M
ME
EC
CH
HA
AN
NI
IC
CA
AL
LS
S
