LP2980AIM5-3.3 National Semiconductor, LP2980AIM5-3.3 Datasheet - Page 15

• Manufacturer Part Number: LP2980AIM5-3.3
• Description: V REG LDO +3.3V, SMD, 2980, SOT235
• Manufacturer: National Semiconductor

Specifications of LP2980AIM5-3.3

• Voltage Regulator Type: Positive Fixed LDO
• Voltage, Input Max: 16V
• Voltage, Output Max: 3.3V
• Current, Output Max: 0.05A
• Voltage, Dropout: 0.12V
• Accuracy, Percentage: 0.5%
• Outputs, No. Of: 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Applications
brought low, the converter will be in shutdown, and will draw
less than 1 µA from the source.
Notes:
A. Drive this input with a logic signal (see Application Hints).
If the shutdown function is not to be used, tie the ON/OFF
pin directly to the V
B. Capacitor is required for regulator stability. Minimum size
is shown, and may be increased without limit.
C. Increasing the output capacitance improves transient re-
sponse and increases phase margin.
D. A heatsink may be required for this transistor. The maxi-
mum allowable value for thermal resistance of the heatsink
is dependent on ambient temperature and load current (see
curves in ). Once the value is obtained from the graph, a
heatsink must be selected which has a thermal resistance
equal to or lower than this value. If the value is above
60˚C/W, no heatsink is required (the TO-220 package alone
will safely dissipate this).
For these curves, a maximum junction temperature of 150˚C
is assumed for the pass transistor. The case-to-heatsink at-
IN
pin.
(Continued)
15
tachment thermal resistance is assumed to be 1.5˚C/W. All
calculations are for 5.5V input voltage (which is worst-case
for power dissipation).
FIGURE 8. Heatsink Thermal Resistance Requirements
for Figure 7
DS012078-54
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