LM2990T-12/NOPB
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Texas Instruments LM2990T-12/NOPB

Manufacturer No:
LM2990T-12/NOPB
Manufacturer:
Texas Instruments
Package:
Tube
Description:
IC REG LINEAR -12V 1.8A TO220-3
Delivery:
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Product Introduction

Overview

The LM2990T-12/NOPB is a three-terminal, low-dropout, negative voltage regulator produced by Texas Instruments. This regulator is designed to provide fixed output voltages of −5 V, −5.2 V, −12 V, and −15 V, with the specific model LM2990T-12/NOPB offering a fixed output voltage of −12 V. It is part of the LM2990 series, which is ideal for dual-supply systems and can also be used as a fixed or adjustable current sink load.

Key Specifications

Parameter Value Unit
Fixed Output Voltage −12 V V
Input Voltage Range −26 V to −6 V V
Output Current (Max) 1 A A
Dropout Voltage (Typical) 0.6 V V
Quiescent Current (Typical) 1 mA mA
Output Voltage Accuracy ±5% %
Operating Temperature Range −40°C to 125°C °C
Package Type TO-220
Thermal Resistance (θJA) 23 °C/W °C/W
Output Noise (10 Hz to 100 kHz, IOUT = 5 mA) 250 μVrms μVrms
PSRR @ 100 kHz 23 dB dB

Key Features

  • Low Dropout Voltage: Typically 0.6 V at 1-A load current, ensuring efficient voltage regulation.
  • High Output Current: Capable of delivering up to 1 A of output current.
  • Low Quiescent Current: Typical quiescent current of 1 mA, contributing to low power consumption.
  • High Accuracy: Output voltage accuracy of ±5% over the entire operating range.
  • Broad Operating Temperature Range: Operates from −40°C to 125°C, making it suitable for various environmental conditions.
  • Low Noise: Output noise of 250 μVrms from 10 Hz to 100 kHz at 5 mA output current.
  • Good PSRR: Power Supply Rejection Ratio (PSRR) of 23 dB at 100 kHz.

Applications

The LM2990T-12/NOPB is ideally suited for dual-supply systems, where it can be used in conjunction with positive voltage regulators like the LM2940 series. It is also applicable as a fixed or adjustable current sink load in various electronic circuits. Other potential applications include:

  • Power supplies for analog and digital circuits.
  • Audio and video equipment requiring stable negative voltages.
  • Industrial control systems and instrumentation.
  • Medical devices and equipment.

Q & A

  1. What is the fixed output voltage of the LM2990T-12/NOPB?

    The fixed output voltage of the LM2990T-12/NOPB is −12 V.

  2. What is the input voltage range for the LM2990T-12/NOPB?

    The input voltage range is from −26 V to −6 V.

  3. What is the maximum output current of the LM2990T-12/NOPB?

    The maximum output current is 1 A.

  4. What is the typical dropout voltage of the LM2990T-12/NOPB?

    The typical dropout voltage is 0.6 V at 1-A load current.

  5. What is the quiescent current of the LM2990T-12/NOPB?

    The typical quiescent current is 1 mA.

  6. What is the output voltage accuracy of the LM2990T-12/NOPB?

    The output voltage accuracy is ±5% over the entire operating range.

  7. What is the operating temperature range of the LM2990T-12/NOPB?

    The operating temperature range is from −40°C to 125°C.

  8. What type of package does the LM2990T-12/NOPB come in?

    The LM2990T-12/NOPB comes in a TO-220 package.

  9. What is the thermal resistance (θJA) of the LM2990T-12/NOPB?

    The thermal resistance (θJA) is 23 °C/W.

  10. What are some common applications of the LM2990T-12/NOPB?

    Common applications include dual-supply systems, audio and video equipment, industrial control systems, and medical devices.

Product Attributes

Output Configuration:Negative
Output Type:Fixed
Number of Regulators:1
Voltage - Input (Max):-26V
Voltage - Output (Min/Fixed):-12V
Voltage - Output (Max):- 
Voltage Dropout (Max):1V @ 1A
Current - Output:1.8A
Current - Quiescent (Iq):1 mA
Current - Supply (Max):5 mA
PSRR:52dB (1kHz)
Control Features:- 
Protection Features:Over Temperature, Short Circuit
Operating Temperature:-40°C ~ 125°C
Mounting Type:Through Hole
Package / Case:TO-220-3
Supplier Device Package:TO-220-3
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Similar Products

Part Number LM2990T-12/NOPB LM2990T-15/NOPB LM2990S-12/NOPB
Manufacturer Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active
Output Configuration Negative Negative Negative
Output Type Fixed Fixed Fixed
Number of Regulators 1 1 1
Voltage - Input (Max) -26V -26V -26V
Voltage - Output (Min/Fixed) -12V -15V -12V
Voltage - Output (Max) - - -
Voltage Dropout (Max) 1V @ 1A 1V @ 1A 1V @ 1A
Current - Output 1.8A 1.8A 1.8A
Current - Quiescent (Iq) 1 mA 1 mA 1 mA
Current - Supply (Max) 5 mA 5 mA 5 mA
PSRR 52dB (1kHz) 52dB (1kHz) 52dB (1kHz)
Control Features - - -
Protection Features Over Temperature, Short Circuit Over Temperature, Short Circuit Over Temperature, Short Circuit
Operating Temperature -40°C ~ 125°C -40°C ~ 125°C -40°C ~ 125°C
Mounting Type Through Hole Through Hole Surface Mount
Package / Case TO-220-3 TO-220-3 TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Supplier Device Package TO-220-3 TO-220-3 DDPAK/TO-263-3

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