Microsemi Corporation SG120-08IG-883B, SG120-08K, SG120-08K-883B, SG120-08L, SG120-08L-883B Datasheet
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NEGATIVE FIXED VOLTAGE REGULATOR
DESCRIPTION
The SG120 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/
7800/120 line of three terminal regulators.
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 or a capacitor and 5mA minimum load 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. 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
These devices are available in TO-257 (hermetically sealed TO-220), both
isolated and non-isolated), TO-3, TO-39 and TO-66 power packages.
FEATURES
••
••
• Output current to 1.5A
••
••
• Excellent line and load regulation
••
••
• Foldback current limiting
••
••
• Thermal overload protection
••
••
• Voltages available: -5V, -12V, -15V
••
••
• Voltages Not Recommended For New
Designs: -5.2V, -8V, -18V, -20V
••
••
• Contact factory for other voltage
options
HIGH RELIABILITY FEATURES
- SG120
♦♦
♦♦
♦ Available to MIL-STD - 883
♦♦
♦♦
♦ Radiation data available
♦♦
♦♦
♦ LMI level "S" processing available
SG120
SCHEMATIC DIAGRAM
11/91 Rev 1.4 6/97 LINFINITY Microelectronics Inc.
Copyright 1997 11861 Western Avenue
∞ ∞
∞ ∞
∞ Garden Grove, CA 92841
1 (714) 898-8121
∞∞
∞∞
∞ FAX: (714) 893-2570
SG120
11/91 Rev 1.4 6/97 LINFINITY Microelectronics Inc.
Copyright 1997 11861 Western Avenue
∞ ∞
∞ ∞
∞ Garden Grove, CA 92841
2 (714) 898-8121
∞∞
∞∞
∞ FAX: (714) 893-2570
ABSOLUTE MAXIMUM RATINGS (Note 1)
NEGATIVE REGULATOR
-65°C to 150°C
300°C
Operating Junction Temperature
Hermetic (K, R, IG - Packages) ...................................
Storage Temperature Range ...........................
Lead Temperature (Soldering, 10 Seconds) .................
FIGURE 1.
MAXIMUM AVERAGE POWER DISSIPATION
FIGURE 2.
QUIESCENT CURRENT VS. LOAD
FIGURE 3.
TEMPERATURE COEFFICIENT
Device Input Voltage Differential
Output Voltage Input Voltage (Output shorted to ground)
-5V -35V 35V
-5.2V -35V 35V
-8V -35V 35V
-12V -35V 35V
-15V -40V 35V
-18V -40V 35V
-20V -40V 35V
150°C
Note 1. Values beyond which damage may occur.
Operating Junction Temperature Range:
SG120 ...........................................................
RECOMMENDED OPERATING CONDITIONS (Note 2)
CHARACTERISTIC CURVES
-55°C to 150°C
Note 2. Range over which the device is functional.
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
R Package:
Thermal Resistance-Junction to Case, θJC................. 5.0°C/W
Thermal Resistance-Junction to Ambient, θJA.............. 40°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 θ
JC
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.
SG120
11/91 Rev 1.4 6/97 LINFINITY Microelectronics Inc.
Copyright 1997 11861 Western Avenue
∞ ∞
∞ ∞
∞ Garden Grove, CA 92841
3 (714) 898-8121
∞∞
∞∞
∞ FAX: (714) 893-2570
NEGATIVE REGULATOR
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 electrolitics 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
from output to input will suffice.
NOTE: C3 optional for improved transient response and ripple
rejection.
R2 =
V(REG)
15mA
V
OUT
= V (REGULATOR)
R1 + R
2
R
1
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