| 摘要 |
A voltage regulator for an electronic circuit card includes a FET (26) with a source supplied via an input LC filter (28, 38) with a voltage to be regulated, a drain for delivering a regulated output voltage via a current-sensing resistor (32) and an output LC circuit (34, 40), and a gate which is supplied with a current drive from a linear transconductance amplifier (54) having a differential input (+, -) responsive to the regulated output voltage relative to a reference voltage. The regulator provides large bandwidth low voltage drop regulation without requiring higher voltage supply for the gate of the FET. A current limiting circuit (82, 84) reduces the current drive in response to excessive current through the current-sensing resistor, and a turn-on control circuit (68) reduces the current drive to provide a controlled turn-on for hot insertion of the card into electronic equipment.
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