1/34August 2003
■ VERY LOW DROPOUT VOLTAGE (0.45V)
■ VERY LOW QUIESCENT CURRENT (TYP.
50 µA IN OFF MODE, 500 µA IN ON MODE)
■ OUTPUT CURRENT UP TO 5 00 mA
■ LOGIC-CONTROLLED ELECTRONIC
SHUTDOW N
■ OUTPUT VOLTAGES OF 1.25; 1.5; 1.8; 2.5;
2.7; 3; 3.3; 3.5; 4; 4.5; 4.7; 5; 5.2; 5.5; 6; 8;
8.5; 9; 12V
■ INTERNAL CURRENT AND THERMAL LIMIT
■ ONLY 2 .2 µ F FOR STABILITY
■ AVAILABLE IN ± 1% (AB) OR ± 2% (C)
SELECTION AT 25 °C
■ SUPPLY VOLTAGE REJECTI ON: 80db (TYP.)
■ TEMPERATURE RAN GE: -40 TO 125 °C
DESCRIPTION
The LF00 series are very Low Drop regulators
available in PENTAWATT, TO-220, TO-220FP,
DPAK and PPAK package and in a wide range of
output v oltages.
The very Low Drop voltage (0.45V) and the v ery
low quiescent current make them particularly
suitable for Low Noise, Low Power appl ications
and spe cially in battery powered system s .
In t he 5 pins conf igurat ion (PENTAWATT and
PPAK) a Shutdown Logic Control function is
available (pin 2, TTL compatible). This means that
when the device is used as a local regulator, it is
possible to put a part of the boa rd in standby,
decreasing the tot al p ower consumption. In the
three t erminal configuration the dev ice has the
same electrical performance, but is fixed in the ON
stat e. It requires only a 2.2 µ F capa citor for
stability allowing space and co st saving.
LF00
SERIES
VERY LOW DROP
VOLTAGE REGULATO RS WITH INHIBIT
SCHEMATIC DIAGRAM
TO-220
PENTAWATT
DPAKPPAK
TO-220FP