LM2936-33 National Semiconductor, LM2936-33 Datasheet - Page 6

• Manufacturer Part Number: LM2936-33
• Description: Ultra-Low Quiescent Current 3.3V Regulator
• Manufacturer: National Semiconductor

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Typical Performance Characteristics
Applications Information
Unlike other PNP low dropout regulators, the LM2936 re-
mains fully operational to 40V. Owing to power dissipation
characteristics of the available packages, full output current
cannot be guaranteed for all combinations of ambient tem-
perature and input voltage. As an example, consider an
LM2936Z-3.3 operating at 25˚C ambient. Using the formula
for maximum allowable power dissipation given in (Note 3) ,
Peak Output Current
Output Impedance
Ripple Rejection
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6
(Continued)
we find that P
contribution of the quiescent current to total power dissipa-
tion the maximum input voltage (while still delivering 50 mA
output current) is 15.3V. The LM2936Z-3.3 will go into ther-
mal shutdown if it attempts to deliver full output current with
an input voltage of more than 15.3V. Similarly, at 40V input
and 25˚C ambient the LM2936Z-3.3 can deliver 15 mA maxi-
mum.
Dmax
Load Transient Response
Line Transient Response
= 641 mW at 25˚C. Including the small
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