52150 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 12/13/01 52150/52175 POSITIVE ADJUSTABLE 5-AMP 78HGA REPLACEMENT 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
- 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 Standard
52175 MIL-STD-883 Screened
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 hermeticall y 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 overl oad 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. 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 12/13/01 POSITIVE ADJUSTABLE 5-AMP VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS
TJ = 25ºC, VIN = 10 V and IOUT = -2.0A unless otherwise specified PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Output Voltage (Note 4) V OUT IOUT = 2.0A, VIN = VOUT + 3.5V 5.0 24 V Line Regulation (Note 2) ∆VOUT VIN = 7.5 to 25V 0.2% 1% V Load Regulation (Note 2) ∆VOUT 10mA ≤ IOUT ≤ 5.0A 0.2% 1% V Quiescent Current I Q IOUT = 0 3.4 10 mA Ripple Rejection RR I OUT = 1.0A, f = 210Hz, 5.0V pk-pk 60 dB Output Noise V n 10Hz ≤ f ≤ 100 kHz VIN = VOUT + 5.0V 50 µVRMS Dropout Voltage (Note 5) V DD IOUT = 5.0A IOUT = 3.0A 2.3 2.0 2.5 2.3 V V Short-Circuit Current Limit IOS VIN = 15V, VOUT = 5V 7.0 12.0 A Control Pin Voltage V C 4.85 5.0 5.25 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 adj ustable series (78HGA) is specified for VOUT = 5.0 V, unless otherwise noted. 4. V OUT is defined as VOUT = R1+ R2 (VCONT) where R1 and R2 are defined in the Basic Test Circuit diagram. 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 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 (150ºC). 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 Max PD(MAX) = TJ(max) – TA θCA = θCS + θSA θJC θJC θJC + θCA TO-3 1.8 2.5 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 1µF 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 Ω and R2 = 5kΩ, Then VOUT = VCONTROL x R1 + R2 V OUT = 5V nominal. R2 Or, if R1 = 10 k Ω and R2 = 5 kΩ 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 POSITIVE ADJUSTABLE 5-AMP VOLTAGE REGULATOR 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 Test Circuit Adjustable Output Voltage Mechanical Configuration Note: All dimensions in inches and millimeters (parentheses).