LTC4054 Single-cell Lithium-ion Battery: Circuits, Pinout, and Datasheet [Video]

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Published: 04 January 2022 | Last Updated: 04 January 2022

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LTC4054ES5-4.2#TRMPBF

LTC4054ES5-4.2#TRMPBF

Linear Technology/Analog Devices

Constant - Programmable LTC4054 SOT-23-5 Thin, TSOT-23-5 Tape & Reel (TR) 5V 500mA 5 Terminals 5 Pin

Purchase Guide

Constant - Programmable LTC4054 SOT-23-5 Thin, TSOT-23-5 Tape & Reel (TR) 5V 500mA 5 Terminals 5 Pin

The LTC4054 is a single-cell lithium-ion battery charger with a complete constant-current/constant-voltage linear charger. This article mainly introduces circuits, pinout, datasheet and other detailed information about Analog Devices LTC4054.

This video will show you the DIY Lithium Charge Circuit just using 4 Components with the LTC4054ES5 "LTH7" Lithium Charge Controller.

DIY Lithium Charge Circuit: Just 4 Components with the LTC4054ES5 "LTH7" Lithium Charge Controller

LTC4054 Description

The LTC4054 is a single-cell lithium-ion battery charger with a complete constant-current/constant-voltage linear charger. The LTC4054 is appropriate for portable applications because to its ThinSOT packaging and low external component count. Furthermore, the LTC4054 was created to work under USB power standards.

The integrated MOSFET architecture eliminates the need for an external sensing resistor and a blocking diode. Thermal feedback controls the charge current to keep the die from overheating when the power is high or the ambient temperature is high. The charge voltage is set at 4.2V, and the charge current is controlled by a single resistor. When the charge current reduces to 1/10th of the planned value after the final float voltage is reached, the LTC4054 automatically ends the charge cycle.

The LTC4054 automatically enters a low current state when the input supply (wall adapter or USB supply) is disconnected, lowering the battery drain current to less than 2μA. The LTC4054 can be switched to shutdown mode, which lowers the supply current to 25μA.

Charge current monitor, under voltage lockout, automated recharge, and a status pin to indicate charge termination and the presence of an input voltage are some of the other features.


LTC4054 Pinout

The following figure is the pinout of LTC4054.

pinout.jpg

Pinout

Pin NumberPin NameDescription
1CHRGOutput for the Open-Drain Charge Status. An inbuilt N-channel MOSFET pulls the CHRG pin low when the battery is charging. When the charge cycle is over, the CHRG pin receives a weak pull-down of about 20μA, indicating a "AC present" status. CHRG is pushed high impedance when the LTC4054 detects an undervoltage lockout condition.
2GNDGround.
3BATOutput of Charge Current Charge current is provided to the battery, and the ultimate float voltage is regulated to 4.2V. The float voltage is set via an internal precision resistor divider from this pin, which is disconnected in shutdown mode.
4VCCSupply Voltage using a Positive Input. The charger is powered by this device. VCC can be anywhere between 4.25 and 6.5 volts and should be bypassed with at least a 1μF femtosecond capacitor. The LTC4054 enters shutdown mode when VCC falls below 30mV of the BAT pin voltage, lowering IBAT to less than 2μA.
5PROGShutdown Pin, Charge Current Program, and Charge Current Monitor A 1 percent resistor, RPROG, is connected to ground to program the charge current. This pin servos to 1V when charging in constant-current mode. The voltage on this pin can be used to calculate the charge current in all modes using the following formula:
IBAT = (VPROG/RPROG) • 1000
The PROG pin can be used to turn off the charger as well. When the program resistor is disconnected from ground, a 3μA current can pull the PROG pin high. The charger enters shutdown mode when it hits the 1.21V shutdown threshold voltage, charging ceases, and the input supply current reduces to 25μA. This pin is also clamped to a voltage of around 2.4V. Currents as high as 1.5mA can be drawn by driving this pin to voltages higher than the clamp voltage. The charger will resume regular operation after reconnecting RPROG to ground.


LTC4054 CAD Model

The followings are the Symbol, Footprint and 3D Model of LTC4054.

symbol.png

Symbol

footprint.png

Footprint

3d model.jpg

3D Model

LTC4054 Features

• Programmable Charge Current Up to 800mA

• No MOSFET, Sense Resistor or Blocking Diode Required

• Complete Linear Charger in ThinSOTTM Package for Single Cell Lithium-Ion Batteries

• Constant-Current/Constant-Voltage Operation with Thermal Regulation* to Maximize Charge Rate Without Risk of Overheating

• Charges Single Cell  Li-Ion Batteries  Directly from USB Port

• Preset 4.2V Charge Voltage with ±1% Accuracy

• Charge Current Monitor Output for Gas Gauging*

• Automatic Recharge

• Charge Status Output Pin

• C/10 Charge Termination

• 25µA Supply Current in Shutdown

• 2.9V  Trickle Charge  Threshold (LTC4054)

• Available Without Trickle Charge (LTC4054X)

• Soft-Start Limits  Inrush Current 

• Available in 5-Lead SOT-23 Package


Specifications

Linear Technology/Analog Devices LTC4054ES5-4.2#TRMPBF technical specifications, attributes, parameters and parts with similar specifications to Linear Technology/Analog Devices LTC4054ES5-4.2#TRMPBF.
  • Type
    Parameter
  • Factory Lead Time
    8 Weeks
  • Lifecycle Status

    Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.

    PRODUCTION (Last Updated: 1 month ago)
  • Surface Mount

    having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.

    YES
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    SOT-23-5 Thin, TSOT-23-5
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Surface Mount
  • Number of Pins
    5
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Tape & Reel (TR)
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    -40°C~85°C TA
  • JESD-609 Code

    The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.

    e3
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Active
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    1 (Unlimited)
  • Number of Terminations
    5
  • ECCN Code

    An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.

    EAR99
  • Terminal Finish

    Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.

    Tin (Sn)
  • Terminal Position

    In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.

    DUAL
  • Terminal Form

    Occurring at or forming the end of a series, succession, or the like; closing; concluding.

    GULL WING
  • Peak Reflow Temperature (Cel)

    Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.

    260
  • Number of Functions
    1
  • Supply Voltage

    Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.

    5V
  • Time@Peak Reflow Temperature-Max (s)

    Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.

    30
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    LTC4054
  • Pin Count

    a count of all of the component leads (or pins)

    5
  • Output Voltage

    Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.

    4.2V
  • Power Supplies

    an electronic circuit that converts the voltage of an alternating current (AC) into a direct current (DC) voltage.?

    5V
  • Number of Channels
    2
  • Max Supply Voltage

    In general, the absolute maximum common-mode voltage is VEE-0.3V and VCC+0.3V, but for products without a protection element at the VCC side, voltages up to the absolute maximum rated supply voltage (i.e. VEE+36V) can be supplied, regardless of supply voltage.

    6.5V
  • Min Supply Voltage

    The minimum supply voltage (V min ) is explored for sequential logic circuits by statistically simulating the impact of within-die process variations and gate-dielectric soft breakdown on data retention and hold time.

    4.25V
  • Analog IC - Other Type

    Analog IC - Other Type is a parameter used to categorize electronic components that are integrated circuits (ICs) designed for analog signal processing but do not fall into more specific subcategories such as amplifiers, comparators, or voltage regulators. These ICs may include specialized analog functions such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), voltage references, or signal conditioning circuits. They are typically used in various applications where precise analog signal processing is required, such as in audio equipment, instrumentation, communication systems, and industrial control systems. Manufacturers provide detailed specifications for these components to help engineers select the most suitable IC for their specific design requirements.

    POWER SUPPLY SUPPORT CIRCUIT
  • Output Current

    The rated output current is the maximum load current that a power supply can provide at a specified ambient temperature. A power supply can never provide more current that it's rated output current unless there is a fault, such as short circuit at the load.

    500mA
  • Adjustable Threshold

    The "Adjustable Threshold" parameter in electronic components refers to the ability to manually set or modify the threshold level at which a specific function or operation is triggered. This feature allows users to customize the sensitivity or activation point of the component according to their specific requirements or preferences. By adjusting the threshold, users can fine-tune the performance of the component to suit different applications or environmental conditions. This flexibility in threshold adjustment can be particularly useful in various electronic devices and systems where precise control over triggering levels is necessary for optimal functionality.

    YES
  • Min Input Voltage

    The parameter "Min Input Voltage" in electronic components refers to the minimum voltage level that must be applied to the component for it to operate within its specified parameters. This value is crucial as providing a voltage below this minimum threshold may result in the component malfunctioning or not functioning at all. It is important to adhere to the specified minimum input voltage to ensure the proper operation and longevity of the electronic component. Failure to meet this requirement may lead to potential damage to the component or the overall system in which it is used.

    4.25V
  • Max Input Voltage

    Max Input Voltage refers to the maximum voltage level that an electronic component can safely handle without getting damaged. This parameter is crucial for ensuring the proper functioning and longevity of the component. Exceeding the specified maximum input voltage can lead to overheating, electrical breakdown, or permanent damage to the component. It is important to carefully adhere to the manufacturer's guidelines regarding the maximum input voltage to prevent any potential issues and maintain the reliability of the electronic device.

    6.5V
  • Supply Current-Max (Isup)

    Supply Current-Max (Isup) refers to the maximum amount of current that an electronic component can draw from its power supply during operation. It represents the peak current demand of the device under normal operating conditions and is critical for ensuring that the power supply can adequately support the component's needs without risking damage or malfunction. This parameter is essential for designing circuits and selecting appropriate power supply units to prevent overloading and ensure reliable performance.

    2mA
  • Nominal Input Voltage

    The actual voltage at which a circuit operates can vary from the nominal voltage within a range that permits satisfactory operation of equipment. The word “nominal” means “named”.

    6.5V
  • Battery Chemistry

    A battery is a device that stores chemical energy, and converts it to electricity. This is known as electrochemistry and the system that underpins a battery is called an electrochemical cell. A battery can be made up of one or several (like in Volta's original pile) electrochemical cells.

    Lithium-Ion
  • Number of Cells
    1
  • Current - Charging

    Current - Charging refers to the flow of electric charge supplied to a rechargeable battery or capacitor during the charging process. It represents the amount of current that is delivered to the energy storage device to replenish its energy. This parameter is critical in determining how quickly a device can be charged and must be managed to ensure safety and longevity of the component. Overcharging or supplying excessive current can lead to overheating or damage, making it essential to adhere to specified charging currents for optimal performance.

    Constant - Programmable
  • Charge Current - Max

    Charge Current - Max is the maximum amount of current that can safely flow into a battery or capacitor during the charging process. It is a crucial parameter that helps prevent overheating and damage to the component. Exceeding this current during charging can lead to reduced performance, shortened lifespan, or even failure of the electronic component. This parameter should be adhered to for safe and effective operation of the device.

    800mA
  • Length
    2.9mm
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    ROHS3 Compliant
  • Radiation Hardening

    Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.

    No
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Lead Free
0 Similar Products Remaining

Parts with Similar Specs

The three parts on the right have similar specifications to Linear Technology/Analog Devices & LTC4054ES5-4.2#TRMPBF.

LTC4054 Functional Block Diagram

The following figure is the LTC4054 Functional Block Diagram.

block diagram.png

Functional Block Diagram


LTC4054 Circuit Diagram

Standalone Li-Ion Battery Charger Circuit LTC4054

We require a specialized charger circuit with limited voltage and current for compact and tiny Li-ion batteries. Here's a basic Li-Ion Battery Charger Circuit that uses the LTC4054 to give limited and regulated output voltage, current, and temperature regulation.

The LTC4054 from analog is a single-cell Lithium-Ion battery linear charger with constant current and voltage. It only requires a few external components to function. This IC may be programmed with an external resistor and can deliver up to 800 mA of charging current.

Circuit Diagram.png

Circuit Diagram

Components Required (BOM)

1C11µFC_0805_2012Metric
2R11.65kΩR_0805_2012Metric
3U1LTC4054TSOT-23-5
4J1Screw_Terminal_01x02JWT_A3963_1x02_P3.96mm_Vertical
5J2
JWT_A3963_1x02_P3.96mm_Vertical

Construction & Working

This Li-ion Battery Charger is designed to charge batteries with a 4.2 V output voltage and a 600 mA output current.

C1 functions as a filter for the input power supply, and R1 acts as a program input resistor, allowing us to adjust the output current value by changing the value of R1.


LTC4054 Typical Applications

The followings show the Typical Applications of LTC4054.

600mA Single Cell Li-Ion Charger.png

600mA Single Cell Li-Ion Charger


USB Wall Adapter Power Li-Ion Charger.png

USB/Wall Adapter Power Li-Ion Charger

Full Featured Single Cell Li-Ion Charger.png

Full Featured Single Cell Li-Ion Charger

800mA Li-Ion Charger with External Power Dissipation.png

800mA Li-Ion Charger with External Power Dissipation

Basic Li-Ion Charger with Reverse Polarity Input Protection.png

Basic Li-Ion Charger with Reverse Polarity Input Protection


LTC4054 Alternatives

Part NumberDescriptionManufacturer
LTC4054LES5-4.2POWER CIRCUITSPower Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO5Analog Devices Inc
LTC4054LES5-4.2#PBFPOWER CIRCUITS150mA Standalone Linear Li-Ion Battery Charger in ThinSOTAnalog Devices Inc


LTC4054 Applications

• Cellular Telephones, PDAs, MP3 Players

• Charging Docks and Cradles

• Bluetooth Applications


LTC4054 Package

The following shows the Package of LTC4054.

package.png


LTC4054 Manufacturer

Analog Devices, Inc. (ADI), sometimes known as Analog, is an American multinational semiconductor firm based in Wilmington, Massachusetts that specializes in data conversion, signal processing, and power management technology.

Analog, mixed-signal, and digital signal processing (DSP) integrated circuits (ICs) are produced by the firm for use in electronic equipment. These technologies are used to convert, condition, and process electrical signals from real-world phenomena like light, sound, temperature, motion, and pressure.

Analog Devices serves around 100,000 clients in the communications, computer, instrumentation, military/aerospace, automotive, and consumer electronics industries.


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Datasheet PDF

Download datasheets and manufacturer documentation for Linear Technology/Analog Devices LTC4054ES5-4.2#TRMPBF.
LTC4054ES5-4.2#TRMPBF

Linear Technology/Analog Devices

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