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Details for Texas Instruments


500 mA Low Dropout Regulator
Buy Directly from Texas Instruments (7230 in Stock)
$0.6500 per unit
Series Information for LM2937ET-12/NOPB - Texas Instruments


  • feature
    60-V Input Transient Protection
  • feature
    Fully Specified for Operation Over u221240u00b0C to 125u00b0C
  • feature
    Internal Short Circuit and Thermal Overload Protection
  • feature
    Mirror Image Insertion Protection
  • feature
    Output Current in Excess of 500 mA
  • feature
    Output Trimmed for 5% Tolerance Under all Operating Conditions
  • feature
    Reverse Battery Protection
  • feature
    Typical Dropout Voltage of 0.5 V at Full Rated Load Current
  • feature
    Wide Output Capacitor ESR Range, up to 3 u03a9


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 battery connections, two-battery jumps, and up to 60V/−50-V load dump transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in.


Output Type:
Input Voltage Min:
Input Voltage Max:
Fixed Output Voltage Nom.:
Adjustable Output Voltage Min:
Adjustable Output Voltage Max:
Output Current:

Alternate Descriptions

Avnet America

LDO Regulator Pos 12V 0.5A 3-Pin(3+Tab) TO-220 Rail

Avnet America product

Avnet Europe

LDO Regulator Pos 12V 0.5A 3-Pin(3+Tab) TO-220 Rail

Avnet Europe product

Texas Instruments

500 mA Low Dropout Regulator

Texas Instruments product


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