The UCC384 family of negative linear series pass regulators is tailored for low drop out applications where low quiescent power is important. Fabricated with a BCDMOS technology ideally suited for low input to output differential applications, the UCC384 will pass 0.5A while requiring only 0.2V of input voltage headroom. Drop out voltage decreases linearly with output current, so that drop out at 50mA is less than 20mV. Quiescent current consumption for the device under normal (non-drop out) conditions is typically 200A. An integrated charge pump is internally enabled only when the device is operating near drop out with low VIN. This guarantees that the device will meet the drop out specifications even for maximum load current and a VIN of 3.2V with only a modest increase in quiescent current. Quiescent current is always less than 350A, with the charge pump enabled. Quiescent current of the UCC384 does not increase with load current. SLUS234A - JANUARY 2000