TL1963A-XX Datasheet, PDF (14/26 Pages) Texas Instruments – 1.5-A LOW-NOISE FAST-TRANSIENT-RESPONSE LOW-DROPOUT REGULATOR

TL1963A-xx
SLVS719A – JUNE 2008 – REVISED AUGUST 2008 ........................................................................................................................................................ www.ti.com
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
V_IN > 3 V
10 µF
(ceramic)
IN
OUT
TL1963A-2.5
SHDN SENSE
GND
10 µF
(ceramic)
2.5 V at 1.5 A
Figure 29. 3.3 V to 2.5 V Regulator
V_IN > 2.7 V
C1 ⁺
10 µF
R5
0.01k
R1
1k
R2
80.6k
R4 R6
2.2k 2.2k
TL1963A-1.8
IN
OUT
SHDN SENSE
GND
C3
1 µF
LOAD
R8
100k
R3
2k
R7
470k
+
NOTE: All capacitors are ceramic.
C2
-
3.3 µF
Figure 30. Adjustable Current Source
14
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