35_V_7_A_LINEAR_REGULATOR_SUPPLY

Published:2009/7/16 21:05:00 Author:Jessie | From:SeekIC

The LT1580 linear regulator circuit shown achieves ±2 percent dc output-voltage accuracy at up to 7 A load current. This circuit restricts the output-voltage transients because of 200-mA to 4-A load-current steps to 65 mV p-p. The LT1580 has a separate remote sense input that maintains the dc voltage at the load accurately, independent of the load current. Output-voltage variation over the full load-current range, known as Load regulation, with remote sense connected (R3 = 0Ω) is very close to ±0 percent. The LT1580 transient response to 3.8-A-load current steps is 88.7 mV p-p (R3 = 0Ω). Resistor R3 is added to intentionally introduce some dc load regulation. The feedback resistors are chosen to set the no-load output voltage slightly higher than 3.5 V. At 4-A load current, the output voltage is regulated slightly below 3.5 V.



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