UCC284–5, UCC284–12, UCC284–ADJ, UCC384–5, UCC384–12, UCC384–ADJ
LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
SLUS234D – JANUARY 2000 – REVISED FEBRUARY 2002 D Precision Negative Series Pass Voltage
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D DP PACKAGE
(FRONT VIEW) Regulation
0.2 V Dropout at 0.5 A
Wide Input Voltage Range –3.2 V to –15 V
Low Quiescent Current Irrespective of Load
Simple Logic Shutdown Interfacing
–5 V, –12 V, and Adjustable Output
2.5% Duty Cycle Short Circuit Protection VOUTS 1 8 SD/CT VIN 2 7 VIN VIN 3 6 VIN GND 4 5 VOUT description
The UCC384-x family of negative linear-series pass regulators is tailored for low-dropout applications where
low-quiescent power is important. Fabricated with a BCDMOS technology ideally suited for low input-to-output
differential applications, the UCC384-x passes 0.5 A while requiring only 0.2 V of input-voltage headroom.
Dropout voltage decreases linearly with output current, so that dropout at 50 mA is less than 20 mV.
Quiescent current consumption for the device under normal (non-dropout) conditions is typically 200 ВµA. An
integrated charge pump is internally enabled only when the device is operating near dropout with low VIN. This
ensured that the device meets the dropout specifications even for maximum load current and a VIN of –3.2 V …
