LM2937 5V Voltage Regulator ORIGINAL

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 0.5 V (1-V ensured 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 3 V.

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 device is stable for all ESR below 3 Ω. 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 space battery connections, two-battery jumps, and up to 60-space V/−50-V load dump transients. Familiar regulator space features such as short circuit and thermal shutdown protection are also built in.

Features:-

• Fully Specified for Operation Over −40°C to 125°C.
• Output Current in Excess of 500 mA.
• Output Trimmed for 5% Tolerance Under all Operating Conditions.
• Typical Dropout Voltage of 0.5 V at Full Rated Load Current.
• Wide Output Capacitor ESR Range, up to 3 Ω.
• Internal Short Circuit and Thermal Overload Protection.
• Reverse Battery Protection.
• 60-V Input Transient Protection.
• Mirror Image Insertion Protection.

Applications :-

• Automotive.
• Industrial Control.
• Point-of-Load regulation.