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52149/52174
79HG REPLACEMENT
NEGATIVE ADJUSTABLE 5-AMP VOLTAGE REGULATOR
Mii
HYBRID MICROELECTRONICS PRODUCTS DIVISION
Features: * * * * * * * * Replacement for 79HG 5.0A Output Current Internal Current And Thermal Overload Protection Internal Short Circuit Current Limit Low Drop-Out Voltage (Typically -2.2 V @ 5.0 A) 50W Power Dissipation Electrically Isolated Case Steel TO-3 Case
Applications: * * Designed for use in general purpose applications where adjustability is advantageous. Military and Hi Rel Industrial applications where hermeticity is required.
ORDER INFORMATION 52149 Standard 52174 MIL-STD-883 Screened DESCRIPTION The 52149/52174, which is a replacement for the 79HG, is an adjustable 4-terminal voltage regulator capable of supplying in excess of 5 A over a -24 V to -2.55 V output range. This Hybrid Voltage Regulator has been designed with all the inherent characteristics of the monolithic 4-terminal regulator; i.e., full thermal overload and short circuit protection. It is packaged in a hermetically sealed 4-pin, TO-3 package providing 50W power dissipation. The regulator consists of a monolithic chip driving a discrete series-pass element and short circuit detection transistors.
ABSOLUTE MAXIMUM RATINGS Input Voltage.........................................................................................................................................................................-35 V Internal Power Dissipation @Tc = 25C ...............................................................................................................................50W Maximum Input-to-Output Voltage Differential...................................................................................................................... 35 V Operating Junction Temperature ....................................................................................................................................... 150C Storage Temperature Range..............................................................................................................................-55C to +150C Pin Temperature (Soldering, 60 seconds) ......................................................................................................................... 300C Commercial Temperature Range 52149 ..............................................................................................................0C to +125C Military Temperature Range 52174....................................................................................................................-55C to +125C
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION * 905 E. Walnut St., Garland, TX 75040 * (972) 272-3571 * Fax (972) 494-2281 www.micropac.com E-MAIL: hybridsales@micropac.com 12/12/01
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52149/52174
NEGATIVE ADJUSTABLE 5-AMP, VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS
TJ = 25C, VIN = -10V and IOUT = -2.0A unless otherwise specified PARAMETER Output Voltage Range Nominal Output Voltage Range Output Voltage Tolerance Line Regulation Load Regulation Control Pin Current Quiescent Current Ripple Rejection Output Noise Voltage Dropout Voltage Short-Circuit Current Limit Control Pin voltage (Reference) VIN = VOUT -5V 40V VIN -7V 40V VIN -7V VIN = VOUT -10V -10mA IOUT -5.0A VIN = -10V -18V VIN -8.5V VOUT = -5V, f = 120 Hz VOUT = -5V, 10 Hz f 100kHz IOUT = -5A @ -0.95 VOUT VIN = -15V VIN = -10V TEST CONDITIONS MIN -7.0 2.55 0.4 0.7 TYP MAX -35 24 4 1.0 1.0 3.0 7.0 50 200 -2.2 8 -2.65 UNIT V V % (VOUT) % (VOUT) % (VOUT) A mA dB V V A V
12 -2.45
DESIGN CONSIDERATIONS This device has thermal overload protection from excessive power and internal short circuit protection, which limits the circuit's maximum current. Thus, the device is protected from overload abnormalities. Although the internal power dissipation is limited, the junction temperature must be kept below the maximum specified temperature (150C). It is recommended, by the manufacturer, that the maximum junction temperature be kept as low as possible for increased reliability. To calculate the maximum junction temperature or heat sink required, the following thermal resistance values should be used. Package TO-3 Where: PD = Power Dissipation Typical 1.8 JC Max 2.5 PD(MAX) = TJ(MAX) - TA CA = CS + SA
TJ = Junction Temperature TA = Ambient Temperature CS = Case-to-heat sink thermal resistance JC = Junction-to-case thermal resistance
JC + CA Solving for TJ = TA + PD (JC + CA) CA = Case-to-ambient thermal resistance SA = Heat sink-to-ambient thermal resistance
The device is designed to operate without external compensation components. However, the amount of external filtering of these voltage regulators depends upon the circuit layout. If in a specific application the regulator is more than four inches from the filter capacitor, a 2F solid tantalum capacitor should be used at the input. A 1F capacitor should be used at the output to reduce transients created by fast switching loads, as seen in the basic test circuit. These filter capacitors must be located as close to the regulator as possible. Caution: Permanent damage can result from forcing the output voltage higher than the input voltage. A protection diode from output to input should be used if this condition exists. VOLTAGE OUTPUT The device has an adjustable output voltage from -2.55 to -24V which can be programmed by the external resistor network (potentiometer or two fixed resistors) using the relationship: Example: If R1 = 0 and R2 = 5k, Then VOUT = VCONTROL R1 + R2 VOUT = -2.55 V nominal, R2 or, if R1 = 12.8 k and R2 = 2.1 k then VOUT = -18V.
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION * 905 E. Walnut St., Garland, TX 75040 * (972) 272-3571 * Fax (972) 494-2281 www.micropac.com E-MAIL: hybridsales@micropac.com 12/12/01
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52149/52174 NEGATIVE ADJUSTABLE 5-AMP, VOLTAGE REGULATOR
Mechanical Configuration
1.551 (39.40) 1.531 (38.19) .770 (19.56) MAX. .293 (7.44) .273 (6.90) .421 (10.69) MIN. SEATING PLANE .067 (1.70) MAX. .041 (1.04) DIA. .037 (0.94)
1.197 (30.40) 1.177 (29.30) .225 (5.71) .205 (5.21) PIN 1 PIN 2
.675 (17.14) .655 (16.64) O.161 (4.09) O.151 (3.84) 2 HOLES R .177 (4.5)
.440 (11.16) .420 (10.57)
PIN 4 12 54
PIN 3
0.47 (11.34) DIA. PIN CIRCLE
Basic Test Circuit Adjustable Output Voltage
3 VIN CIN=2uF 4 2 + 1 VOUT =VCONT R1+R2 R2 R2 R1 C >1.0uF +L
VOUT
SOLID TANTALUM
Note: All Dimension in notes and Millimeters (parenthesis)
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION * 905 E. Walnut St., Garland, TX 75040 * (972) 272-3571 * Fax (972) 494-2281 www.micropac.com E-MAIL: hybridsales@micropac.com 12/12/01
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