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52150/52175
78HGA REPLACEMENT
POSITIVE ADJUSTABLE 5-AMP VOLTAGE REGULATOR
Mii
HYBRID MICROELECTRONICS PRODUCTS DIVISION
Features: * * * * * * * * Replacement for 78HGA 5.0 A Output Current Internal Current And Thermal Limiting Internal Short Circuit Current Limit Low Drop-Out Voltage (Typically 2.3 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 52150 52175 DESCRIPTION The 52150/52175, which is a replacement for the 78HGA, is an adjustable 4-terminal positive voltage regulator capable of supplying in excess of 5.0 A over a 5.0 V to 24 V output range. Only two external resistors are required to set the output voltage. It is packaged in a hermetically sealed TO-3, and provides 50W power dissipation. The regulator consists of a monolithic chip driving a discrete series-pass element. A beryllium-oxide substrate is used in conjunction with an isothermal layout to optimize the thermal characteristics of each device and still maintain electrical isolation between the various chips. This unique circuit design limits the maximum junction temperature of the power output transistor to provide full automatic thermal overload protection. If the safe operating area is ever exceeded (Note 1), the device simply shuts down rather than fail or damage other system components. This feature eliminates the need to design costly regulators built from discrete components. Standard MIL-STD-883 Screened
ABSOLUTE MAXIMUM RATINGS Input Voltage.................................................................................................................................................................40 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 52150 .....................................................................................................0C to +125C Military Temperature Range 52175 ......................................................................................................... -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 12/13/01
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52150/52175 POSITIVE ADJUSTABLE 5-AMP VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS TJ = 25C, VIN = 10 V and IOUT = -2.0A unless otherwise specified PARAMETER SYMBOL TEST CONDITIONS Output Voltage (Note 4) VOUT IOUT = 2.0A, VIN = VOUT + 3.5V Line Regulation (Note 2) VIN = 7.5 to 25V VOUT Load Regulation (Note 2) 10mA IOUT 5.0A VOUT Quiescent Current IQ IOUT = 0 Ripple Rejection RR IOUT = 1.0A, f = 210Hz, 5.0V pk-pk Output Noise Vn 10Hz f 100 kHz VIN = VOUT + 5.0V Dropout Voltage (Note 5) VDD IOUT = 5.0A IOUT = 3.0A Short-Circuit Current IOS VIN = 15V, VOUT = 5V Limit Control Pin Voltage VC MIN 5.0 TYP 0.2% 0.2% 3.4 60 50 2.3 2.0 7.0 4.85 5.0 2.5 2.3 12.0 5.25 MAX 24 1% 1% 10 UNIT V V V mA dB VRMS V V A V
NOTES: 1. This voltage regulator offers output transistor safe-area protection. However, to maintain full protection, the device must be operated within the maximum input-to-output voltage differential rating listed on the data sheet under "Absolute Maximum Ratings". For applications violating these limits, device will not be fully protected. 2. Load and line regulation are specified at constant junction temperature. Pulse testing is required with a pulse width 1 ms and a duty cycle 5%. Full Kelvin connection methods must be used to measure these parameters. 3. The performance characteristics of the adjustable series (78HGA) is specified for VOUT = 5.0 V, unless otherwise noted. 4. VOUT is defined as VOUT = R1+ R2 (VCONT) where R1 and R2 are defined in the Basic Test Circuit diagram. R2 5. Dropout Voltage is the input-output voltage differential that causes the output voltage to decrease by 5% of its initial value.
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 12/13/01
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52150/52175 POSITIVE ADJUSTABLE 5-AMP VOLTAGE REGULATOR
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 Type JC 1.8 Max JC 2.5 PD(MAX) = TJ(max) - TA JC + CA CA = CS + SA
TO-3 Where:
TJ = Junction Temperature TA = Ambient Temperature
Solving for TJ = TA + PD (JC+CA) CA = Case-to-ambient thermal resistance
PD = Power Dissipation CS = Case-to-heat sink thermal resistance SA = Heat sink-to-ambient thermal resistance JC = Junction-to-case 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 5.0V 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 = 5V nominal. VOUT = VCONTROL x R1 + R2 R2 Or, if R1 = 10 k and R2 = 5 k then VOUT = 15V
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 12/13/01
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52150/52175 POSITIVE 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
Test Circuit Adjustable Output Voltage
3 VIN CIN=2uF SOLID TANTALUM 4 2 1 R2 R1 CL>1.0uF VOUT
Note: All dimensions in inches and millimeters (parentheses).
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 12/13/01
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