The UCC381-3/-5/-ADJ family of positive linear series pass regulators is
tailored for low drop out applications where low quiescent power is important.
Fabricated with a BiCMOS technology ideally suited for low input to
output differential applications, the UCC381 will pass 1A while requiring
only 0.5V of input voltage headroom. Dropout voltage decreases linearly
with output current, so that dropout at 200mA is less than 100mV. Quiescent
current is always less than 650μA. To prevent reverse current conduction,
on-chip circuitry limits the minimum forward voltage to typically 50mV.
Once the forward voltage limit is reached, the input-output differential voltage
is maintained as the input voltage drops until undervoltage lockout disables
the regulator.
UCC381-3 and UCC381-5 versions have on-chip resistor networks preset
to regulate either 3.3V or 5.0V, respectively. Furthermore, remote sensing
of the load voltage is possible by connecting the VOUTS pin directly at the
load. The output voltage is then regulated to 1.5% at room temperature and
better than 2.5% over temperature. The UCC381-ADJ version has a regulated
output voltage programmed by an external user-definable resistor ratio.
UCC281DP-5
UCC281DP-5G4
UCC281DP-ADJ
UCC281DP-ADJG4
UCC281DPTR-5
UCC281DPTR-5G4
UCC281DPTR-ADJ
UCC281DPTR-ADJG4
UCC381DP-3
UCC381DP-3G4
UCC381DP-5
UCC381DP-5G4
UCC381DP-ADJ
UCC381DP-ADJG4
UCC381DPTR-3
UCC381DPTR-3G4
UCC381DPTR-5
UCC381DPTR-5G4
UCC381DPTR-ADJ
UCC381DPTR-ADJG4
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