LM2937ET-2.5/NOPB | Texas Instruments

Low Dropout Voltage Regulator, LM2937ET-2.5/NOPB, Texas Instruments

The LM2937ET-2.5/NOPB 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 LM2937ET-2.5/NOPB requires an output bypass capacitor for stability.

As with most low-dropout regulators, the ESR of this capacitor remains a critical design parameter; however, the LM2937ET-2.5/NOPB includes special compensation circuitry that relaxes ESR requirements. The device is stable for all ESR values below 3 Ω, allowing the use of low-ESR chip capacitors. Ideally suited for automotive applications, the LM2937ET-2.5/NOPB protects itself and any load circuitry from reverse battery connections, two-battery jumps, and up to 60 V/−50 V load dump transients. Standard regulator features such as short-circuit and thermal shutdown protection are also built in.

Features

• Output Trimmed for 5% Tolerance Under all Operating Conditions
• Wide Output Capacitor ESR Range, up to 3 Ω
• Internal Short Circuit and Thermal Overload Protection
• Reverse Battery Protection
• Mirror Image Insertion Protection

Applications

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