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LM2991T

  • LM2991T

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LM2991T Overview

The LM2991 is a low dropout adjustable negative regulator with a output voltage range between 3 V to 24 V. The LM2991 provides up to 1 A of load current and features a ON /OFF pin for remote shutdown capability.

The LM2991 uses new circuit design techniques to provide a low dropout voltage, low quiescent current and low temperature coefficient precision reference. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with a 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT VIN ≤ 3 V).

The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods. The LM2991 is available in 5-lead TO-220 and DDPAK/TO-263 packages and is rated for operation over the automotive temperature range of 40°C to +125°C. Mil-Aero versions are also available.

lm2991t-1 lm2991t-2

Features

  • Output Voltage Adjustable from 3 V to 24 V, Typically 2 V to 25 V
  • Output Current in Excess of 1 A
  • Dropout Voltage Typically 0.6 V at 1-A Load
  • Low Quiescent Current
  • Internal Short Circuit Current Limit
  • Internal Thermal Shutdown With Hysteresis
  • TTL, CMOS Compatible
  • ON
  • Functional Complement to the LM2941 Series

Product Parameters

  • genericPartNumber

    LM2991

  • partDescription

    1-A, negative, adjustable low-dropout voltage regulator with enable

  • statusDescription

    This product continues to be in production to support existing customers. If available, you will find relevant collateral, software and tools in the product page. This product has no or limited design support from TI.

  • packageQtyCarrier

    45|TUBE

  • orderablePartNumber

    LM2991T

  • statusDisplay

    NOT RECOMMENDED FOR NEW DESIGNS

  • packageQuantity

    45

  • packagePins

    TO-220 (KC)|5

Technical Documents

  • Linear and Switching Voltage Regulator Fundamental Part 1Details>>

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Other distributor's price

Distributor Part # Mfg. Description Price
digikey LM2991T Texas Instruments IC REG LIN NEG ADJ 1A TO220-5

1---$3.9600

10---$3.5520

25---$3.3580

100---$2.9103

250---$2.7611

500---$2.4775

1000---$2.1120
arrow LM2991T Texas Instruments LDO Regulator Neg -3V to -24V 1A Automotive 5-Pin(5+Tab) TO-220 Tube

45---$1.7140

100---$1.6970

250---$1.6900
rs LM2991T Texas Instruments Voltage regulator,LM2991T -25V 1A, TU

45---HK$36.9080

90---HK$36.1050

180---HK$35.3030
mouser LM2991T Texas Instruments LDO Voltage Regulators 1-A, negative, adjustable low-dropout voltage regulator with enable 5-TO-220

180---$3.9200

270---$3.7200

540---$3.3400

1080---$2.9200
newark LM2991T Texas Instruments Adjustable Ldo Voltage Regulator, -2V To, Msl:Msl 1 - Unlimited, Svhc:No Svhc (15-Jan-2019) Rohs Compliant: Yes |Texas Instruments LM2991T/NOPB

1---$4.5900

10---$4.3100

25---$4.0800

50---$3.9000

100---$3.7400

250---$3.5500

500---$3.4900

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