52149 MICROPAC | Alldatasheet

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Technical content

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 52149/52174 NEGATIVE ADJUSTABLE 5-AMP 79HG REPLACEMENT 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

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 NEGATIVE ADJUSTABLE 5-AMP, VOLTAGE REGULATOR

ELECTRICAL CHARACTERISTICS

TJ = 25ºC, VIN = -10V and IOUT = -2.0A unless otherwise specified PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Output Voltage Range -7.0 -35 V Nominal Output Voltage Range V IN = VOUT -5V 2.55 24 V Output Voltage Tolerance 40V ≤ VIN ≤ -7V 4 % (V OUT) Line Regulation 40V ≤ VIN ≤ -7V 0.4 1.0 % (V OUT) Load Regulation V IN = VOUT -10V -10mA ≤ IOUT ≤ -5.0A 0.7 1.0 % (V OUT) Control Pin Current 3.0 µA Quiescent Current V IN = -10V 7.0 mA Ripple Rejection -18V ≤ VIN ≤ -8.5V VOUT = -5V, f = 120 Hz 50 dB Output Noise Voltage V OUT = -5V, 10 Hz ≤ f ≤ 100kHz 200 µV Dropout Voltage I OUT = -5A @ -0.95 VOUT -2.2 V Short-Circuit Current Limit V IN = -15V 8 12 A Control Pin voltage (Reference) V IN = -10V -2.65 -2.45 V 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 abnormalitie s. Although the internal power dissipation is limited, the j unction temperature must be kept below the maximum specified temperature (150ºC). It is recommended, by the manufacturer, that the maximum junction temperature be kept as low as po ssible for increased reliability. To calcul ate the maximum junction temperature or he at sink required, the following thermal resistance values should be used. θJCPackage Typical Max PD(MAX) = TJ(MAX) – TA θCA = θCS + θSA TO-3 1.8 2.5 θJC + θCA Solving for TJ = TA + PD (θJC + θCA) Where: T J = Junction Temperature TA = Ambient Temperature θCA = Case-to-ambient thermal resistance PD = Power Dissipation θCS = Case-to-heat sink thermal resistance θJC = Junction-to-case thermal resistance θSA = 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 2µF solid tantalum capacitor should be used at the input. A 1 µF 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 Ω and R2 = 5kΩ, Then VOUT = VCONTROL R1 + R2 V OUT = -2.55 V nominal, R2 or, if R1 = 12.8 k Ω and R2 = 2.1 kΩ 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 NEGATIVE ADJUSTABLE 5-AMP, VOLTAGE REGULATOR Mechanical Configuration Note: All Dimension in notes and Millimeters (parenthesis) R .177 (4.5) PIN 3 54°12° PIN 4 PIN 2PIN 1 0.47 (11.34) DIA. PIN CIRCLE .440 (11.16) .420 (10.57) .205 (5.21) .225 (5.71) 1.177 (29.30) 1.197 (30.40) .675 (17.14) .655 (16.64) Ø.151 (3.84) Ø.161 (4.09) 2 HOLES .041 (1.04) .037 (0.94) DIA. .067 (1.70) MAX. SEATING PLANE .421 (10.69) MIN. .293 (7.44) .273 (6.90) 1.551 (39.40) 1.531 (38.19) MAX. .770 (19.56) C >1.0uFL INV C =2uFIN SOLID TANTALUM OUTV OUTV =VCONT R1+R2 Basic Test Circuit Adjustable Output Voltage