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Product details

Parameters

Output options Fixed Output Iout (Max) (A) 1 Vin (Max) (V) 26 Vin (Min) (V) 6 Vout (Max) (V) 15 Vout (Min) (V) 5 Fixed output options (V) 5, 9, 12, 15 Noise (uVrms) 150 Iq (Typ) (mA) 10 Thermal resistance θJA (°C/W) 23 Load capacitance (Min) (µF) 22 Rating Catalog Regulated outputs (#) 1 Features Accuracy (%) 5 PSRR @ 100 KHz (dB) 54 Dropout voltage (Vdo) (Typ) (mV) 500 Operating temperature range (C) 0 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

TO-220 (NDE) 3 47 mm² 10.16 x 4.58 TO-220 (NDG) 3 194 mm² 10.16 x 19.05 TO-263 (KTT) 3 155 mm² 10.16 x 15.24 open-in-new Find other Linear regulators (LDO)

Features

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

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 LM2940-N and LM2940C and all regulated circuitry are protected from reverse battery installations or 2-battery 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 mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet LM2940x 1-A Low Dropout Regulator datasheet (Rev. J) Dec. 22, 2014
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Technical articles LDO basics: noise – part 1 Jun. 14, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Reference designs

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CAD/CAE symbols

Package Pins Download
DDPAK/TO-263 (KTT) 3 View options
TO-220 (NDE) 3 View options
TO-220 (NDG) 3 View options

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