SG7800A/SG7800 SERIES
SG7800A/SG7800
POSITIVE FIXED VOLTAGE REGULATOR
DESCRIPTION
The SG7800A/SG7800 series of positive regulators offer self contained,
fixed-voltage capability with up to 1.5A of load current and input voltage up
to 50V (SG7800A series only). These units feature a unique on-chip
trimming system to set the output voltages to within
±1.5%
of nominal on the
SG7800A series,
±2.0%
on the SG7800 series. The SG7800A versions also
offer much improved line and load regulation characteristics. Utilizing an
improved Bandgap reference design, problems have been eliminated that
are normally associated with the Zener diode references, such as drift in
output voltage and large changes in the line and load regulation.
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 small output capacitor 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.
Product is available in hermetically sealed TO-257, TO-3, TO39 and LCC
packages.
FEATURES
•
•
•
•
•
•
•
•
Output voltage set internally to
±
1.5% on SG7800A
Input voltage range to 50V max. on SG7800A
Two volt input-output differential
Excellent line and load regulation
Foldback current limiting
Thermal overload protection
Voltages available: 5V, 12V, 15V
Available in surface mount package
HIGH RELIABILITY FEATURES
- SG7800A/7800
♦
Available to MIL-STD - 883
♦
MIL-M38510/10702BXA - JAN7805T
♦
MIL-M38510/10703BXA - JAN7812T
♦
MIL-M38510/10704BXA - JAN7815T
♦
MIL-M38510/10706BYA - JAN7805K
♦
MIL-M38510/10707BYA - JAN7812K
♦
MIL-M38510/10708BYA - JAN7815K
♦
Radiation data available
♦
LMI level "S" processing available
SCHEMATIC DIAGRAM
*
* For normal operation the (V
OS
) sense pin must be externally connected to the load.
05/01 Rev 1.4
Copyright
©
1997
1
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SG7800A/SG7800 SERIES
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Device
Output Voltage
5V
12V
15V
Input Voltage
35V
35V
35V
POSITIVE REGULATOR
Input Voltage
(transient)
(Note 3)
50V
50V
50V
Input Voltage Differential
(Output shorted to ground)
35V
35V
35V
Operating Junction Temperature
Hermetic (K, T, IG & L - Packages) .........................
Note 1. Values beyond which damage may occur.
150°C
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
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:
SG7800A/SG7800 ........................................ -55°C to 150°C
Note 2. Range over which the device is functional.
CHARACTERISTIC CURVES
Note 3. Operation at high input voltages is dependent upon load current. When
load current is less than 5mA, output will rise out of regulation as input-
oiutput differential icreases beyond 30V. Note also from Figure 1, that
maximum load current is reduced at high voltages. The 50V input rating
of the SG140A series refers to ability to withstnd high line or transient
conditions without damage. Since the regulator's maximum current
capability is reduced, the output may fall out of regulation at high input
voltages under nominal loading.
FIGURE 1.
PEAK OUTPUT CURRENT
VS. INPUT - OUTPUT DIFFERENTIAL
05/01 Rev 1.4
Copyright
©
1997
2
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SG7800A/SG7800 SERIES
CHARACTERISTIC CURVES
(continued)
POSITIVE REGULATOR
FIGURE 2.
MINIMUM INPUT - OUTPUT VOLTAGE
VS. LOAD CURRENT
FIGURE 3.
RIPPLE REJECTION VS. FREQUENCY
FIGURE 4.
TEMPERATURE COEFFICIENT OF OUTPUT VOLTAGE
APPLICATIONS
FIGURE 5 - FIXED OUTPUT REGULATOR
FIGURE 6 - CIRCUIT FOR INCREASING OUTPUT VOLTAGE
FIGURE 7 - HIGH OUTPUT CURRENT, SHORT CIRCUIT PROTECTED
FIGURE 8 - ADJUSTABLE OUTPUT REGULATOR, 7V to 30V
05/01 Rev 1.4
Copyright
©
1997
3
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SG7800A/SG7800 SERIES
ELECTRICAL SPECIFICATIONS
5.0V POSITIVE REGULATOR
(Note 1)
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7805A/SG7805 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
= 0.33µF, and C
OUT
= 0.1µF. Low duty cycle pulse
testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
SG7805A/SG7805
Parameter
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Test Conditions
T
J
= 25°C
V
IN
= 7.5V to 20V, T
J
= 25°C
V
IN
= 8V to 12V, T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.5A, T
J
= 25°C
I
O
= 250mA to 750mA, T
J
= 25°C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25°C
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
= 25°C
With Line: V
IN
= 8V to 25V
With Load: I
O
= 5mA to 1.0A (Power Pkgs.)
I
O
= 5mA to 500mA (T)
∆V
O
= 100mV, T
J
= 25°C
Power Pkgs: I
O
= 1.0A, T - Pkg: I
O
= 500mA
Power Pkgs: V
IN
= 10V, T
J
= 25°C
T - Pkg: V
IN
= 10V, 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
SG7805
SG7805A
Min. Typ. Max. Min. Typ. Max.
4.92 5.00 5.08 4.80 5.00 5.20
5
50
5
25
2
25
2
12
15
50
50
15
5
5
25
25
25
20
5
25
4.85
4.85
5.00
5.00
4
5.15
5.15
7
6
0.8
0.5
0.5
2.5
3.3
2.0
1.2
0.7
40
20
175
20
175
4.65
4.65
5.00
5.00
4
5.35
5.35
7
6
0.8
0.5
0.5
2.5
3.3
2.0
1.2
0.7
40
Units
V
mV
mV
mV
mV
mV
V
V
mA
mA
mA
mA
mA
V
A
A
A
A
dB
µV/V
mV
°C
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
1.5
0.5
2
2.0
1.0
1.5
0.5
2
2.0
1.0
68
68
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.
05/01 Rev 1.4
Copyright
©
1997
4
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SG7800A/SG7800 SERIES
ELECTRICAL SPECIFICATIONS
12V POSITIVE REGULATOR
(Note 1)
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7812A/SG7812 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
= 0.33µF, and C
OUT
= 0.1µF. Low duty cycle pulse
testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
SG7812A/SG7812
Parameter
Output Voltage
Line Regulation
(Note 1)
Load Regulation
(Note 1)
Test Conditions
T
J
= 25°C
V
IN
= 14.5V to 30V, T
J
= 25°C
V
IN
= 16V to 22V, T
J
= 25°C
Power Pkgs: I
O
= 5mA to 1.5A, T
J
= 25°C
I
O
= 250mA to 750mA, T
J
= 25°C
T - Pkg: I
O
= 5mA to 500mA, T
J
= 25°C
V
IN
= 15.5V 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
= 25°C
With Line: V
IN
= 15V to 30V
With Load: I
O
= 5mA to 1.0A (Power Pkgs.)
I
O
= 5mA to 500mA (T)
∆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
SG7812
SG7812A
Min. Typ. Max. Min. Typ. Max.
11.8 12.0 12.2 11.5 12.0 12.5
12
60
12
120
6
30
6
60
80
28
120
28
10
40
10
60
40
10
60
10
11.7
11.7
12.0
12.0
4
12.3
12.3
7
6
0.8
0.5
0.5
2.5
3.3
1.7
1.2
0.7
40
48
175
48
175
11.4
11.4
12.0
12.0
4
12.6
12.6
7
6
0.8
0.5
0.5
2.5
3.3
1.7
1.2
0.7
40
Units
V
mV
mV
mV
mV
mV
V
V
mA
mA
mA
mA
mA
V
A
A
A
A
dB
µV/V
mV
°C
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
1.5
0.5
2
2.0
1.0
1.5
0.5
2
2.0
1.0
61
61
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.
05/01 Rev 1.4
Copyright
©
1997
5
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
