Microsemi Corporation SG120-08IG-883B, SG120-08K, SG120-08K-883B, SG120-08L, SG120-08L-883B Datasheet

SG120

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

SCHEMATIC DIAGRAM

11/91 Rev 1.4 6/97	LINF INI T Y	Microelectronics		Inc.
Copyright 1997	11861 Western Avenue ∞	Garden	Grove, CA	92841
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SG120			NEGATIVE REGULATOR
ABSOLUTE MAXIMUM RATINGS (Note 1)
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
Operating Junction Temperature	150° C	Storage Temperature Range ...........................		-65° C to 150° C
Hermetic (K, R, IG - Packages) ...................................		Lead Temperature (Soldering, 10 Seconds) .................		300° C
Note 1. Values beyond which damage may occur.
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, θ JC .................	5.0°C/W
Thermal Resistance-Junction to Ambient, θ JA ..............	40°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: TJ = TA + (PD x θ JA).

Note B. The above numbers forθ 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:	-55° C to 150° C
SG120 ...........................................................

Note 2. Range over which the device is functional.

CHARACTERISTIC CURVES

FIGURE 1.	FIGURE 2.	FIGURE 3.
MAXIMUM AVERAGE POWER DISSIPATION	QUIESCENT CURRENT VS. LOAD	TEMPERATURE COEFFICIENT

11/91 Rev 1.4 6/97	LINF INI T Y	Microelectronics		Inc.
Copyright 1997	11861 Western Avenue ∞	Garden	Grove, CA	92841
2	[phone]	∞	FAX: [phone]

SG120	NEGATIVE REGULATOR
CHARACTERISTIC CURVES (continued)

FIGURE 4.	FIGURE 5.	FIGURE 6.
SHORTCIRCUIT CURRENT VS. VIN	QUIESCENT CURRENT VS. VIN	SHORT CIRCUIT CURRENT VS. VIN

FIGURE 7.	FIGURE 8.
DROPOUT CHARACTERISTICS	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.

	V		= V (REGULATOR)	R1 + R2	R =	V(REG)
		OUT		R1		15mA
					2

11/91 Rev 1.4 6/97	LINF INI T Y	Microelectronics		Inc.
Copyright 1997	11861 Western Avenue ∞	Garden	Grove, CA	92841
3	[phone]	∞	FAX: [phone]