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MC7918BT Datasheet(PDF) 1 Page - Motorola, Inc |
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MC7918BT Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 12 page MC7900 Series DEVICE TYPE/NOMINAL OUTPUT VOLTAGE MC7905 MC7905.2 MC7906 MC7908 5.0 V 5.2 V 6.0 V 8.0 V MC7912 MC7915 MC7918 MC7924 12 V 15 V 28 V 24 V THREE–TERMINAL NEGATIVE FIXED VOLTAGE REGULATORS Pin 1. Ground 2. Input 3. Output STANDARD APPLICATION A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V above more negative even during the high point of the input ripple voltage. These two digits of the type number indicate nominal voltage. Cin is required if regulator is located an appreciable distance from power supply filter. CO improve stability and transient response. MC79XX Input Cin* 0.33 µF CO** 1.0 µF Output T SUFFIX PLASTIC PACKAGE CASE 221A Heatsink surface connected to Pin 2. D2T SUFFIX PLASTIC PACKAGE CASE 936 (D2PAK) 3 1 2 3 1 2 Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. XX, ** ** Order this document by MC7900/D 1 MOTOROLA ANALOG IC DEVICE DATA Three-Terminal Negative Voltage Regulators The MC7900 series of fixed output negative voltage regulators are intended as complements to the popular MC7800 series devices. These negative regulators are available in the same seven–voltage options as the MC7800 devices. In addition, one extra voltage option commonly employed in MECL systems is also available in the negative MC7900 series. Available in fixed output voltage options from – 5.0 V to – 24 V, these regulators employ current limiting, thermal shutdown, and safe–area compensation – making them remarkably rugged under most operating conditions. With adequate heatsinking they can deliver output currents in excess of 1.0 A. • No External Components Required • Internal Thermal Overload Protection • Internal Short Circuit Current Limiting • Output Transistor Safe–Area Compensation • Available in 2% Voltage Tolerance (See Ordering Information) Representative Schematic Diagram Gnd VO VI 3.6 k 1.2 k 1.1 k 2.0 k 2.0 k 8.0 k 1.0 k 1.6 k 4.0 k 0.3 10 k 10 k 20 k 20 k 20 pF 10 pF 240 750 R1 R2 This device contains 26 active transistors. ORDERING INFORMATION Device Output Voltage Tolerance Operating Temperature Range Package MC79XXACD2T 2% T0 ° 125 °C Surface Mount MC79XXCD2T 4% TJ =0° to +125°C Surface Mount MC79XXACT 2% TJ = 0° to +125°C Insertion Mount MC79XXCT 4% Insertion Mount MC79XXBD2T 4% TJ = – 40° to +125°C Surface Mount MC79XXBT 4% TJ = – 40° to +125°C Insertion Mount XX indicates nominal voltage. © Motorola, Inc. 1996 Rev 6 |
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