1.5 A Negative Voltage Regulator

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Abraham Boyd
5 years ago
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Description This series of fixed-negative-voltage monolithic integrated-circuit voltage regulators is designed to complement Series MIK7800 in a wide range of applications.

5 amperes of output current. The internal current limiting and thermal shutdown features of these regulators make them essentially immune to overload.

1 Description This series of fixed-negative-voltage monolithic integrated-circuit voltage regulators is designed to complement Series MIK7800 in a wide range of applications. These applications include on-card regulation for elimination of noise and distribution problems associated with single point regulation. Each of these regulators can deliver up to 1.5 amperes of output current. The internal current limiting and thermal shutdown features of these regulators make them essentially immune to overload. In addition to use as fixed-voltage regulators, these devices can be used with external components to obtain adjustable output voltages and current and also as the power pass element in precision regulators. Features 3-Terminal Regulators Output Current Up to 1.5 A No External Components Internal Thermal Overload Protection High Power Dissipation Capability Internal Short-Circuit Current Limiting Output Transistor Safe Area Compensation Package information Package TO-220 (top view) Typical application data 1.5 A regulator When using a negative regulator, bypass capacitors are a must on both the input and output. Recommended values are 2 µf on the input and 1 µf on the output. It is considered good practice to include a 0.1 µf capacitor on the output to improve the transient response (Fig. 1). These capacitors may mylar, ceramic, or tantalum, provided that they have good high frequency characteristics. $ IN 2 3 $out MIK7900 2µF 1µ F 0.1µ F 1 Figure 1. Negative Regulator Absolute maximum ratings over operating temperature range (unless otherwise noted) Maximum Input voltage MIK All others -35 Continuous total dissipation at 25 C free-air temperature 2 Continuous total dissipation at (or bellow) 25 C case temperature 15 Operating free-air, case, or virtual junctions temperature range 0 to 150 Storage temperature range -65 to 150 Lead temperature 3.2 mm (1/8 inch) from case for 10 seconds 260 W C Recommended operating conditions Min Max MIK MIK Input voltage I MIK MIK MIK MIK MIK Output current, I O 1.5 A Operating virtual junction temperature, T J C Page 1 of 5

2 Device Selection Guide Device Output oltage MIK MIK MIK MIK MIK MIK MIK Electrical characteristics MIK7905 Electrical characteristics at specified virtual junction temperature, I = -10, I O = 500 (unless otherwise noted) MIK C C to 125 C I = -7 to -20, I = -7 to C I = -8 to I = -8 to -18, Temperature coefficient of output voltage I O = 5 0 C to 125 C -0.4 / C Output noise voltage f= 10 Hz to 100 KHz 25 C 125 µ I = -7 to C to 125 C I O = 5 to 1A Electrical characteristics MIK7906 Electrical characteristics at specified virtual junction temperature, I = -11, I O = 500 (unless otherwise noted) MIK C C to 125 C I = -8 to -21, I = -8 to C I = -9 to I = -9 to -19, Temperature coefficient of output voltage I O = 5 0 C to 125 C -0.4 / C Output noise voltage f= 10 Hz to 100 KHz 25 C 150 µ I = -8 to C to 125 C I O = 5 to 1A Page 2 of 5

3 Electrical characteristics MIK7908 Electrical characteristics at specified virtual junction temperature, I = -14, I O = 500 (unless otherwise noted) I = to -21.5, f= 120Hz MIK C C to 125 C I = to -23, I = to C I = -11 to Temperature coefficient of output voltage I O = 5 0 C to 125 C -0.6 / C Output noise voltage f= 10Hz to 100 KHz 25 C 200 µ I = to C to 125 C I O = 5 to 1A Electrical characteristics MIK7912 Electrical characteristics at specified virtual junction temperature, I = -19, I O = 500 (unless otherwise noted) MIK C C to 125 C I = to -27, I = to C 5 80 I = -16 to I = -15 to -25, Temperature coefficient of output voltage I O = 5 0 C to 125 C -0.8 / C Output noise voltage f= 10 Hz to 100 KHz 25 C 300 µ I = to C to 125 C I O = 5 to 1A Page 3 of 5

4 Electrical characteristics MIK7915 Electrical characteristics at specified virtual junction temperature, I = -23, I O = 500 (unless otherwise noted) I = to -30, MIK C C to 125 C I = to C I = -20 to I = to -28.5, Temperature coefficient of output voltage I O = 5 0 C to 125 C -1 / C Output noise voltage f= 10 Hz to 100 KHz 25 C 375 µ I = to C to 125 C I O = 5 to 1A Electrical characteristics MIK7918 Electrical characteristics at specified virtual junction temperature, I = -27, I O = 500 (unless otherwise noted) MIK C C to 125 C I = -21 to -33, I = -21 to C I = -24 to I = -22 to -32, Temperature coefficient of output voltage I O = 5 0 C to 125 C -1.0 / C Output noise voltage f= 10Hz to 100 KHz 25 C 450 µ I = -21 to C to 125 C I O = 5 to 1A Page 4 of 5

5 Electrical characteristics MIK7924 Electrical characteristics at specified virtual junction temperature, I = -33, I O = 500 (unless otherwise noted) MIK C C to 125 C I = -27 to -38, I = -27 to C I = -30 to I = -28 to -38, Temperature coefficient of output voltage I O = 5 0 C to 125 C -1 / C Output noise voltage f= 10Hz to 100 KHz 25 C 600 µ I = -27 to C to 125 C I O = 5 to 1A Page 5 of 5

78LXX. Description. Features. Package. Internal Block Digram O C I. Package TO-92 (top view)

78LXX. Description. Features. Package. Internal Block Digram O C I. Package TO-92 (top view) ) Description This series of fixed-voltage monolithic integrated-circuit voltage regulators is designed for a wide range of applications. These applications include on-card regulation for elimination of