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L7905C Scheda tecnica(PDF) 8 Page - STMicroelectronics |
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L7905C Scheda tecnica(HTML) 8 Page - STMicroelectronics |
8 / 13 page Figure 1 : Fixed Output Regulator. Figure 2 : Split Power Supply ( ± 15V/1A). Notes : 1. To specify an output voltage, substitute voltage value for ”XX”. 2. Required for stability. For value given, capacitor must be solid tantalum. If aluminium electrolitics are used, at least ten times value should be selected. C1 is required if regulator is located an appreciable distance from power supply filter. 3. To improve transient response. If large capacitors are used, a high current diode from input to output (1N4001 or similar) should be introduced to protect the device from momentary input short circuit. Against potential latch-up problems. APPLICATION INFORMATION Figure 3 : Circuit for Increasing Output Voltage. Figure 4 : High Current Negative Regulator (– 5V/4A with 5A current limiting). C3 Optional for improved transient response and ripple rejection. Figure 5 : Typical ECL System Power Supply (– 5.2V/4A). Optional dropping resistor to reduce the power dissipated in the boost transistor. VO = V XX R 1 + R 2 R 2 V XX R 2 > 3I d L7900 8/13 |
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