Datasheet

Application information ST1L05, ST1L05A, ST1L05B, ST1L05C, ST1L05D
14/24 Doc ID 14492 Rev 2
6 Application information
The ST1L05 is a low dropout linear regulator. It provides up to 1.3 A with a low 300 mV
dropout. The input voltage range is from 3 V to 5.5 V. The device is available in fixed and
adjustable output versions.
The regulator is equipped with internal protection circuitry, such as short-circuit current
limiting and thermal protection.
The regulator is designed to be stable with ceramic capacitors on the input and the output.
The expected values of the input and output ceramic capacitors are from 1 µF to 22 µF with
4.7 µF typical. The input capacitor must be connected within 0.5 inches of the V
I
terminal.
The output capacitor must also be connected within 0.5 inches of output pin. There is no
upper limit to the value of the input capacitor.
Figure 24, Figure 25, Figure 26 and Figure 27 illustrate the typical application schematics:
the
Figure 24. Application schematic for the ST1L05
V
IN
V
IN
V
OUT
ST1L05
V
O_SENSE
GND
V
OUT
GND
C
I
C
O
V
IN
V
IN
V
OUT
ST1L05
V
O_SENSE
GND
V
OUT
GND
C
I
C
O
Figure 25. Application schematic for the ST1L05A
V
IN
V
IN
V
OUT
ST1L05A
GND
V
OUT
GND
C
I
C
O
V
IN
V
IN
V
OUT
ST1L05A
GND
V
OUT
GND
C
I
C
O