LP2992ILD-3.3 National Semiconductor, LP2992ILD-3.3 Datasheet - Page 13

• Manufacturer Part Number: LP2992ILD-3.3
• Description: IC,VOLT REGULATOR,FIXED,+3.3V,BIPOLAR,LLCC,6PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LP2992ILD-3.3

• Rohs Compliant: NO

Application Hints
It should also be noted that the ESR of a typical Tantalum will
increase about 2:1 as the temperature goes from 25˚C down
to −40˚C, so some guard band must be allowed.
ON/OFF INPUT OPERATION
The LP2992 is shut off by driving the ON/OFF input low, and
turned on by pulling it high. If this feature is not to be used,
the ON/OFF input should be tied to V
output on at all times.
To assure proper operation, the signal source used to drive
the ON/OFF input must be able to swing above and below
the specified turn-on/turn-off voltage thresholds listed in the
Electrical Characteristics section under V
mis-operation, the turn-on (and turn-off) voltage signals ap-
plied to the ON/OFF input must have a slew rate which is
≥ 40 mV/µs.
Caution: the regulator output voltage can not be guaranteed
if a slow-moving AC (or DC) signal is applied that is in the
range between the specified turn-on and turn-off voltages
listed under the electrical specification V
cal Characteristics).
REVERSE INPUT-OUTPUT VOLTAGE
The PNP power transistor used as the pass element in the
LP2992 has an inherent diode connected between the regu-
lator output and input. During normal operation (where the
input voltage is higher than the output) this diode is
reverse-biased.
(Continued)
IN
to keep the regulator
ON/OFF
ON/OFF
(see Electri-
. To prevent
13
However, if the output is pulled above the input, this diode
will turn ON and current will flow into the regulator output. In
such cases, a parasitic SCR can latch which will allow a high
current to flow into V
damage the part.
In any application where the output may be pulled above the
input, an external Schottky diode must be connected from
V
reverse voltage across the LP2992 to 0.3V (see Absolute
Maximum Ratings).
LLP Mounting
The LLP package requires specific mounting techniques
which are detailed in National Semiconductor Application
Note # 1187. Referring to the section PCB Design Recom-
mendations, it should be noted that the pad style which
should be used with the LLP package is the NSMD
(non-solder mask defined) type.
IN
to V
OUT
(cathode on V
IN
(and out the ground pin), which can
IN
, anode on V
OUT
), to limit the
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