LFXX Datasheet, PDF (1/54 Pages) STMicroelectronics – Logic-controlled electronic shutdown

LFXX
Very low drop voltage regulator with inhibit function
TO-220
TO-220FP
PPAK
DPAK
Features
• Very low-dropout voltage (0.45 V)
• Very low quiescent current (typ. 50 µA in OFF
mode, 500 µA in ON mode)
• Output current up to 500 mA
• Logic-controlled electronic shutdown
• Output voltages of 1.5; 1.8; 2.5; 3.3; 4.7; 5; 6;
8; 8.5; 9; 12 V
• Automotive grade product: 1.8 V, 2.5 V, 3.3 V,
5.0 V, 8.0 V, 8.5 V V_OUT in DPAK and PPAK
packages
• Internal current and thermal limit
• Only 2.2 µF for stability
• Available in ±1% (AB), ± 1.5% (AC) or ± 2% (C)
selection at 25 °C
• Supply voltage rejection: 80 db (typ.)
• Temperature range: from -40 to 125 °C
Datasheet - production data
Description
The LFXX is a very low drop regulator available in
TO-220, TO-220FP, DPAK and PPAK packages
and in a wide range of output voltages. The low
drop voltage (0.45 V) and low quiescent current
make it particularly suitable for low-noise, low-
power applications and especially in battery-
powered systems. In the 5 pin configuration
(PPAK) a shutdown logic control function is
available (pin 2, TTL compatible). This means that
when the device is used as a local regulator, a
part of the board can be put in standby,
decreasing the total power consumption. In the
three terminal configuration, the device has the
same electrical performance, but it is fixed in ON
state. It requires a capacitor of only 2.2 µF for
stability, saving board space and costs. The LFXX
is available as automotive grade in DPAK and
PPAK packages, for the options of output
voltages whose commercial part numbers are
shown in the order codes. These devices are
qualified according to the specification AEC-Q100
of the automotive market, in the temperature
range - 40 °C to 125 °C, and the statistical tests
PAT, SYL, SBL are performed.
January 2017
This is information on a product in full production.
DocID2574 Rev 30
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