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Details for Texas Instruments


1A Low Dropout Regulator
Buy Directly from Texas Instruments (11499 in Stock)
$0.7300 per unit
Series Information for LM2940SX-12/NOPB - Texas Instruments


  • feature
    Dropout Voltage Typically 0.5 V at IOUT = 1 A
  • feature
    Input Voltage Range = 6 V to 26 V
  • feature
    Internal Short Circuit Current Limit
  • feature
    Mirror Image Insertion Protection
  • feature
    Output Current in Excess of 1 A
  • feature
    Output Voltage Trimmed Before Assembly
  • feature
  • feature
    Reverse Battery Protection


LDO FIXED 5V 0.5A TO-263-3
The LM2940-N and LM2940C positive voltage regulators feature the ability to source 1 A of output current with a dropout voltage of typically 0.5 V and a maximum of 1 V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3 V. The quiescent current with 1 A of output current and an input-output differential of 5 V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3 V). Designed also for vehicular applications, the LM2940N and LM2940C and all regulated circuitry are protected from reverse battery installations or 2battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940-N and LM2940C cannot be harmed by temporary mirrorimage insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.


Output Type:
Input Voltage Min:
Input Voltage Max:
Fixed Output Voltage Nom.:
Adjustable Output Voltage Min:
Adjustable Output Voltage Max:
Output Current:
Dropout Voltage Vdo:
LDO Regulator Case Style:
No. of Pins:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
12V 1A LDO Voltage Regulators
Automotive Qualification Standard:
RoHS Phthalates Compliant:
MSL 3 - 168 hours
No SVHC (27-Jun-2018)

Alternate Descriptions

Avnet America

LDO Regulator Pos 12V 1A 4-Pin(3+Tab) TO-263 T/R

Avnet America product

Avnet Europe

LDO Regulator Pos 12V 1A 4-Pin(3+Tab) TO-263 T/R

Avnet Europe product

Texas Instruments

1A Low Dropout Regulator

Texas Instruments product