Part Number: LT1054CP

Manufacturer: Texas Instruments


Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of LT1054CP

Datasheet  LT1054CP datasheet
Category Integrated Circuits (ICs)
Family PMIC – Voltage Regulators – DC DC Switching Regulators
Manufacturer Texas Instruments
Packaging Tube
Part Status Active
Function Ratiometric, Step-Up
Output Configuration Positive or Negative
Topology Charge Pump
Output Type Adjustable (Fixed)
Number of Outputs 1
Voltage – Input (Min) 3.5V
Voltage – Input (Max) 15V
Voltage – Output (Min/Fixed) 3.5V (-Vin, 2Vin)
Voltage – Output (Max) 26.4V
Current – Output 100mA
Frequency – Switching 25kHz
Synchronous Rectifier No
Operating Temperature 0°C ~ 70°C (TA)
Mounting Type Through Hole
Package / Case 8-DIP (0.300″, 7.62mm)
Supplier Device Package 8-PDIP

LT1054CP Introduction

The LT1054 is a versatile integrated circuit that is commonly referred to as a negative voltage generator or a negative charge pump. Generating negative voltages that are proportional to the incoming voltage (VCC) is a crucial process. Due to its unique ability, this component is valuable for applications that require negative voltage sources. The LT1054 is a useful tool for engineers and designers to generate the negative voltages required by various circuits and systems. This guide will explore the features, specifications, and applications of the LT1054 to demonstrate its significance and potential use in electronic designs.

LT1054CP Working Principle

The LT1054 functions as a charge pump and a voltage exchanger that utilizes capacitors to store and transfer energy. The device converts the incoming voltage (VCC) into a regulated negative voltage (VOUT).

The LT1054 utilizes a charge pump circuit that employs a group of switching elements and capacitors to alter the voltage. During operation, the charge pump charges and drains capacitors periodically in a specific manner. This generates a voltage that is opposite in polarity to the input voltage.

Typically, the output voltage (VOUT) of the LT1054 is slightly lower than -VCC due to the wiring configuration. The negative voltage can be readily utilized in locations where a negative voltage source is required.

The output voltage (VOUT) can be lowered to a specific absolute voltage by utilizing feedback resistors. By making this adjustment, it is possible to fine-tune the negative output voltage to suit the requirements of the specific application. Designers can achieve precise control over the output voltage level by selecting appropriate feedback resistors.

The LT1054’s charge pump design simplifies the process of converting input voltage into a regulated negative output voltage. Additionally, the output voltage can be further adjusted by incorporating feedback resistors. This makes it an excellent method for generating negative voltages across a broad range of electrical circuits and systems.

LT1054CP Features and Specifications

The most significant features and specifications of the LT1054

  • The LT1054 has the ability to regulate a high output current of 100 mA. This function ensures a stable and reliable power supply to the connected parts, making it suitable for a variety of situations.
  • The LT1054 experiences minimal voltage loss during its operation. This feature simplifies the process of converting a positive input voltage to a negative output voltage. This feature ensures that the generated negative voltage is in close proximity to the desired value. This helps minimize power loss.
  • The LT1054 IC features a power-saving function known as “shutdown mode” that conserves energy when the IC is not in operation. This mode consumes less power, resulting in improved system performance and extended battery life for portable devices.
  • The LT1054 is capable of functioning with a broad range of input voltages, making it compatible with various power sources. This feature facilitates easy integration into various circuit designs without requiring additional components to regulate the voltage.
  • The LT1054 is easily integrated into electronic circuits as it comes in an 8-DIP (Dual In-Line Package) package size, which is widely used in the industry. This compact package simplifies the process of adding components to circuit boards and streamlines the planning phase.
  • The LT1054 boasts a low quiescent current, indicating that it consumes minimal power while in operation. This is particularly beneficial in situations where battery power is utilized and conserving power is crucial.

In general, the LT1054 boasts several features that enable it to function effectively and efficiently for a wide range of applications. The device’s ability to regulate high output current, minimize voltage loss, operate in shutdown mode, accommodate a wide input voltage range, and maintain low quiescent current make it an excellent option for efficiently and effectively generating negative voltages.

LT1054CP Application Examples

  • Biasing circuits: The LT1054 is often used in biasing circuits for analog devices and electronic parts like operational amplifiers (op-amps) and transistors. It provides a stable and regulated source of negative voltage for exact biasing, making sure that the device works well and stays stable.
  • LCD Displays: To power the display parts or backlights, LCD displays often need a source of negative voltage. The LT1054 is a great choice for making the negative voltage needed for LCD displays in digital watches, calculators, and other portable gadgets.
  • Audio Systems: The LT1054 can be used in audio systems to make a negative voltage source, which is needed by some audio circuits like microphone preamplifiers, audio amplifiers, and audio signal processing circuits. It makes sure that these parts work right and do their jobs.
  • Industrial Control Systems: The LT1054 can be used in industrial control systems that need stable and well-controlled negative voltages. In different industrial automation and control applications, it can be used to power analog sensor interfaces, control modules, signal conditioning circuits, or data acquisition systems.
  • Battery-Powered Devices: The LT1054 is good for battery-powered devices because it uses little power and is small. It can be used in handheld devices, portable tools, and other battery-powered systems that need a negative voltage source. Its efficiency and small size make it useful in designs with limited room.
  • Automobile electronics: The LT1054 is also used in automobile electronics to make negative voltages, which are sometimes needed for different tasks. It can be used in instrument clusters, infotainment systems, car control modules, and any other automotive circuitry that needs a negative voltage source.

The LT1054 shows how versatile it is by being used in many different businesses and applications that need a reliable and regulated source of negative voltage. Its small size, high ability to control current, and high economy make it a popular choice, especially in designs with limited board space where maximizing board space is important.


In conclusion, the LT1054CP charge pump switching regulator IC is a flexible and necessary part for making negative voltages in electrical circuits. Its small size and ability to control a high current mean that it will work well and reliably. Engineers can use it in a wide range of applications, such as biasing circuitry, LCD displays, and industrial control systems, as long as they know how its pins are set up, how it works, and how it should be designed. The LT1054CP is especially good for places with limited space because it is efficient and takes up little room. At ICRFQ, we are committed to giving you the best possible knowledge and support to help you use the LT1054CP to its fullest ability in your projects.

4.8/5 - (397 votes)
Kevin Chen