LM2937ES-5.0

Product Summary

General Description:The LM2937 is a positive voltage regulator capable of supplying up to 500 mA of load current. The use of a PNP power
transistor provides a low dropout voltage characteristic. With a load current of 500 mA the minimum input to output voltage
differential required for the output to remain in regulation is typically 0.5V (1V guaranteed maximum over the full operating temperature range). Special circuitry has been incorporated to minimize the quiescent current to typically only
10 mA with a full 500 mA load current when the input to output voltage differential is greater than 3V. The LM2937 requires an output bypass capacitor for stability. As with most low dropout regulators, the ESR of this capacitor remains a critical design parameter, but the LM2937
includes special compensation circuitry that relaxes ESR requirements. The LM2937 is stable for all ESR below 3Ω. This allows the use of low ESR chip capacitors.Ideally suited for automotive applications, the LM2937 will
protect itself and any load circuitry from reverse battery connections, two-battery jumps and up to +60V/?50V load dump
transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in

Parametrics

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage
Continuous 26V
Transient (t ≤ 100 ms) 60V
Internal Power Dissipation (Note 2) Internally Limited
Maximum Junction Temperature 150℃
Storage Temperature Range -65℃ to +150℃
TO-220 (10 seconds) 260℃
TO-263 (10 seconds) 230℃
SOT-223 (Vapor Phase, 60 seconds) 215℃
SOT-223 (Infared, 15 seconds) 220℃
ESD Susceptibility (Note 3) 2 kV

Features

Features
(1) Fully specified for operation over -40℃ to +125℃; 
(2) Output current in excess of 500 mA; 
(3) Output trimmed for 5% tolerance under all operating conditions; 
(4) Typical dropout voltage of 0.5V at full rated load current; (5) Wide output capacitor ESR range, up to 3Ω; 
(6) Internal short circuit and thermal overload protection; 
(7) Reverse battery protection; 
(8) 60V input transient protection; 
(9) Mirror image insertion protection

Diagrams