Datasheet

IN OUT
SENSE
GND
V
IN
> 3 V
2.5 V at 1.5 A
SHDN
TL1963A-2.5
10 µF
(ceramic)
10 µF
(ceramic)
+
C1
10 µF
R3
2 kW
R2
80.6 kW
R4
2.2 kW
R5
0.01 W
R6
2.2 kW
TL1963A-1.8
SHDN
OUT
SENSE
-
+
R8
100 kW
LOAD
R7
470 kW
C3
1 µF
C2
3.3 µF
IN
GND
V > 2.7 V
IN
R1
1 kW
TL1963A-xx
www.ti.com SLVS719F –JUNE 2008– REVISED MAY 2011
APPLICATION INFORMATION
The TL1963A-xx series are 1.5-A LDO regulators optimized for fast transient response. The devices are capable
of supplying 1.5 A at a dropout voltage of 340 mV. The low operating quiescent current (1 mA) drops to less
than 1 μA in shutdown. In addition to the low quiescent current, the TL1963A-xx regulators incorporate several
protection features which make them ideal for use in battery-powered systems. The devices are protected
against both reverse input and reverse output voltages. In battery-backup applications where the output can be
held up by a backup battery when the input is pulled to ground, the TL1963A-xx acts as if it has a diode in series
with its output and prevents reverse current flow. Additionally, in dual-supply applications where the regulator
load is returned to a negative supply, the output can be pulled below ground by as much as 20 V and still allow
the device to start and operate.
Typical Applications
Figure 29. 3.3 V to 2.5 V Regulator
NOTE: All capacitors are ceramic.
Figure 30. Adjustable Current Source
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