深圳市中立信电子科技有限公司

1 Features 3 Description

The LM2937 is a positive voltage regulator capable of

1• Fully Specified for Operation Over −40°C to 125°C

supplying up to 500 mA of load current. The use of a

• Output Current in Excess of 500 mA PNP power transistor provides a low dropout voltage

• Output Trimmed for 5% Tolerance Under all characteristic. With a load current of 500 mA the

Operating Conditions minimum input to output voltage differential required

• Typical Dropout Voltage of 0.5 V at Full Rated for the output to remain in regulation is typically 0.5 V

(1-V ensured maximum over the full operating Load Current

temperature range). Special circuitry has been

• Wide Output Capacitor ESR Range, up to 3 Ω incorporated to minimize the quiescent current to

• Internal Short Circuit and Thermal Overload typically only 10 mA with a full 500-mA load current

Protection when the input to output voltage differential is greater

than 3 V. • Reverse Battery Protection

• 60-V Input Transient Protection The LM2937 requires an output bypass capacitor for

stability. As with most low dropout regulators, the • Mirror Image Insertion Protection

ESR of this capacitor remains a critical design

parameter, but the LM2937 includes special 2 Applications compensation circuitry that relaxes ESR

• Automotive requirements. The device is stable for all ESR below

3 Ω. This allows the use of low ESR chip capacitors. • Industrial Control

• Point-of-Load regulation