Voltage Regulators IC

A regulated and there­fore constant, "clean" DC output voltage is a prere­quisite for the relia­bility and longevity of many electrical components. Without voltage regulator ICs to stabilise oper­ating voltages, modern house­hold appli­ances, our entire ITC and enter­tain­ment equip­ments as well as complex indus­trial sys­tems would no longer be feasible.

Unlike transformators and rectifiers, voltage regulators can eliminate the proportion of unde­sirable AC vol­tage com­ponents (residual ripple) still present here. The regu­lator ICs are used, for example, for short-circuit pro­tection or current limi­tation in switching circuits. There are different types of regu­lators, for example with AC-DC con­verter charac­teristics for different high and low voltage ranges. Switching and linear regu­lators are the most important IC configurations.

Switching Regulators

  • Switching the input voltage using a power tran­sistor in rapid suc­cession
  • Advantages: High efficiency, low heat gene­ration, step-up/step-down/nega­tive vol­tage operation
    Disadvantages: More complex hard­ware/circuit design, higher noise

Linear Voltage Regulators

  • Reduction of the input voltage to the set out­put voltage using a power tran­sistor (resistive load)
  • Advantages: Simpler circuit, low noise
    Disadvantage: Lower efficiency, higher heat gene­ration, only step-down opera­tion possible
  • Cross-regulator type : Load in parallel with the regu­lator circuit; only for small power classes
  • Longitudinal regulator type : Low-drop vol­tage regu­lator; low-loss

The exact choice of voltage regulator there­fore depends very much on the requirements:

  • Efficiency
  • Size
  • Cost
  • Fixed or adjustable output voltage
  • With/without AC/DC conversion

We recommend the Korean manu­facturer TAEJIN Technology for IC regulators. Let our experts advise you.

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Company & News

New partnership with TAEJIN

April 24 - Korean manufacturer for voltage regulator ics TAEJIN Technology is now part of our CAPCOMP product family.


Dokumenttyp Hersteller Bezeichnung Datei
Datasheet TAEJIN LM1117GS | L.D.O. Voltage Regulator PDF 454.1 Kb
Datasheet TAEJIN LM2576 | 3A 52KHz | Step-Down Switching Regulator PDF 1.4 Mb
Datasheet TAEJIN LM2576HV | 3A 52KHz | Step-Down Switching Regulator PDF 477.5 Kb
Datasheet TAEJIN LM2596 | 3A 150KHz | Step-Down Switching Regulator PDF 784.9 Kb
Datasheet TAEJIN LM2596HV | 60V 3A 150KHz | Step-Down Switching Regulator PDF 330.6 Kb
Datasheet TAEJIN LM39300/39301/39302 | 3A Low-Voltage Low-Dropout Voltage Regulators PDF 433.9 Kb
Datasheet TAEJIN MAX3485 | RS485-RS422-Transceivers PDF 224.7 Kb
Datasheet TAEJIN MAX485 | RS485-RS422-Transceivers PDF 337.2 Kb
Datasheet TAEJIN TJ232 | RS232-Driver/Receivers PDF 299.4 Kb
Datasheet TAEJIN TJ5641 | ULDO Linear Regulator PDF 689.9 Kb
Datasheet TAEJIN TPS2553D | Adjustable Current Limited Power Distribution Switch PDF 430.9 Kb
Datasheet TAEJIN ULN2803A | 8-Digit Darlington Current Driver PDF 300.0 Kb

Types Voltage Regulator IC

TEAJIN Step-Down-Regulator

Switching Regulator
Step-Down-Converter / Buck Converter


  • Output voltage lower
    than input voltage
  • More efficient than
    linear regulator


  • 1A Output, 52kHz
  • 3A Output, 52kHz
  • 3A Output, 150kHz
  • 60V, 3A, 150kHz


  • Computer technology
  • Automotive mechatronics
  • Industrial automation

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TEAJIN RS485-RS422 Transceivers

RS485-RS422 Transceivers

Half duplex transceivers with fault protection

  • 3.3 V, 10Mbps
  • Low-Power, Slew-Rate-Limited (BiCMOS design)


  • Low power RS-485 systems
  • DTE-DCE interfaces
  • Packet switching
  • LAN networks
  • Data concentration
  • Data multiplexer
  • Integrated Services Digital Network (ISDN)

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RS232 Dual Driver-Receiver


  • 5V Dual channel
  • 4.5V to 5.5V
  • Input: 1.0µA at 25°C
  • Output: 24µA
  • SOP-16 Pack
  • Use in many ITC applications

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Dual Channel ULDO
Linear Regulator

Fixed voltage

  • Extremely low dropout voltage
    Output: 600/600mA

  • Very good power net and
    load regulation

  • Overheating protection
    & overvoltage protection
  • SOP8 and SOP8-PP


  • Chargers

  • LCDs (Smart TV)

  • Motherboards, graphics cards

  • Power supply units

  • High-performance linear switches

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TEAJIN Adjustable Current Limited Power Distribution Switch

Single-channel high-side MOSFET switch

Adjustable current-limited power distribution switch

  • 2.8V to 5.5V

  • Adjustable current limiting: 200mA to 2.25A
  • Overheat protection & short circuit protection


  • USB devices

  • Power switch

  • ACPI power distriubtion

  • Notebooks

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Voltage Regulator

  • 1A L.D.O. Low Power Positive Voltage Regulator
  • 3A Low-Voltage Low-Dropout Regulator
  • Very low quiescent current
  • Very low dropout voltage


  • Battery chargers

  • Mobile computers

  • High power linear regulators
  • Mother B/D clock supplies
  • Disc drives
  • Active SCSI terminators
  • Power switches
  • ACPI power distriubtion
  • Notebooks
  • Hot plugin power supplies

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8-Digit Darlington
Current Driver

Bipolar transistor arrays

  • 8 Darlington arrays per package
  • 500 mA rated collector current (single output)
  • Output voltage 50V
  • Output clamp diodes


  • Relay drivers

  • Stepper, DC brushed motor drivers

  • Lamp drivers

  • Display drivers

  • Line drivers

  • Logic buffers

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All those who have registered a trade. We supply to large customers as well as medium-sized companies, small busi­nesses and engineering offices. Schools, colleges, univer­sities and public institu­tions are also provided with technical advice and supplies. Depen­ding on the purchase quantity and product, we grant staggered prices that can vary on a daily basis. Ask us for an indivi­dual offer.

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No, you are also welcome to request an individual offer. The ordering option at shop24.capcomp.de is particularly suitable for smaller quantities. The WEBSHOP is to be understood as an additional service offer where you can get a quick overview of availability, delivery times and prices. Furthermore, with its filter and search function, the shop also offers a quick overview of the different variants, designs, voltages, currents. Our stock in Freiberg am Neckar (South West of Germany) is well stocked for the common types. Provided that our suppliers accept it, special solutions are also offered here. In this case, we recommend that you ask us about delivery times.

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Why are components like ultracaps called different names?

The variety of terms is explained by the English-language terms commonly used in the electronics industry, which are often mixed with German terms or used synonymously. In some cases, manufacturers have also introduced artificial terms to better distinguish themselves from competitors. Here are the most important examples:

Double layer capacitors (DSK) are referred to synonymously as:

  • EDLC (Electric Double Layer Capacitor)
  • Supercapacitors = Supercaps
  • Ultracapacitors = Ultracaps
  • Goldcap™ [Panasonic]
  • Boostcap™  [Maxwell]
  • Greencap™  [Samwha]
  • PURIXEL™  [Pureechem] for supercap cells
  • PURETRON™  [Pureechem] for supercap modules

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