LM109K

Name: LM109K
Brand: Texas Instruments
Rating: 4.5 (10 reviews)
Author: Lisleapex

LM109K Integrated Circuit Bare Die by National Semiconductor

7,972 Effective Inventory

LM109K

Effective Inventory7,972

LM109K Integrated Circuit Bare Die by National Semiconductor

Manufacturer Part # : LM109K
Package/Case: TO-3
Brand: Texas Instruments
Product Categories : Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Series : LM109

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LM109K DataSheet

Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

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LM109K Details

The LM109K is a voltage regulator manufactured by Texas Instruments, designed for reliable voltage regulation in various electronic devices and systems. This device features a maximum input voltage of 40V, adjustable output voltage from 1.2V to 37V, and a 1.5A output current capability. It operates over a temperature range of -55°C to 150°C and offers thermal shutdown and short-circuit protection.

Key Features

Maximum Input Voltage of 40V: The LM109K can handle input voltages up to 40V, making it suitable for a wide range of applications.
Adjustable Output Voltage from 1.2V to 37V: This feature allows the LM109K to be used in various voltage regulation tasks with adjustable output voltages.
1.5A Output Current Capability: The LM109K can deliver up to 1.5A of output current, making it suitable for medium-power applications.
Thermal Shutdown and Short-Circuit Protection: The LM109K features thermal shutdown and short-circuit protection, ensuring reliable operation in harsh environments.

Applications

Power Supplies: The LM109K is suitable for use in power supplies where adjustable output voltage and high current capability are required.
Battery Chargers: This device can be used in battery chargers that require adjustable output voltage and high current capability.
Electronic Devices: The LM109K is suitable for use in various electronic devices, such as computers, televisions, and audio equipment, where reliable voltage regulation is required.

Where to Use

The LM109K can be used in a wide range of applications that require adjustable output voltage and high current capability. Some examples include:

Power supplies for electronic devices
Battery chargers for electric vehicles or consumer electronics
Industrial control systems requiring adjustable output voltage

How to Use

To use the LM109K, follow these general guidelines:

Connect the input voltage to the IN pin.
Set the output voltage using the adjustable resistor or potentiometer (if applicable).
Connect the load to the OUT pin.
Ensure proper heat sinking and thermal management for reliable operation.

(Tip: For detailed usage instructions, refer to the datasheet.)

Application Circuit

The application circuit diagram for the LM109K illustrates how to connect the voltage regulator IC to an electronic device or system. It includes connections for input voltage, output voltage, and load current, ensuring proper operation and reliable voltage regulation.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Equivalents

LDO5V: A similar low-dropout voltage regulator IC from Texas Instruments offering comparable features and performance.
LM317: An alternative adjustable voltage regulator IC from National Semiconductor with equivalent functionality.

Complementary

The LM109K can be complemented by other voltage regulator ICs or power management components that offer additional features and capabilities, such as:

LM337: A similar adjustable voltage regulator IC from Texas Instruments offering higher current capability and enhanced thermal protection.
TPS6105x: A family of high-efficiency DC-DC converters from Texas Instruments that can be used in conjunction with the LM109K for more complex power management applications.

Frequently Asked Questions

Q: What is the maximum input voltage supported by the LM109K?

A: The LM109K can handle input voltages up to 40V.

Q: Can the LM109K be used in industrial control systems?

A: Yes, the LM109K is suitable for use in industrial control systems that require adjustable output voltage and high current capability.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category !	Linear Voltage Regulators	RoHS	N
REACH	Details	Mounting Style	Through Hole
Package / Case	TO-3	Number of Outputs	1 Output
Polarity	Positive	Output Voltage	5 V
Output Current !	1 A	Output Type	Fixed
Input Voltage, Min	7.1 V	Input Voltage, Max	35 V
Minimum Operating Temperature	- 55 C	Maximum Operating Temperature !	+ 150 C
Load Regulation !	15 mV	Line Regulation !	4 mV
Quiescent Current !	10 mA	Series	LM109
Brand	Texas Instruments	Product Type !	Linear Voltage Regulators
PSRR / Ripple Rejection - Typ	50 dB	Factory Pack Quantity	50
Subcategory	PMIC - Power Management ICs	Unit Weight	0.225789 oz

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification LM109K PDF Download

FAQs

What is LM109K?

The LM109K is a precision voltage regulator IC developed by Texas Instruments. It is designed to provide a stable output voltage for electronic circuits, making it suitable for applications where precise voltage regulation is required, such as power supplies, instrumentation, and data acquisition systems.

How Does LM109K Work?

The LM109K operates as a linear voltage regulator, maintaining a constant output voltage despite fluctuations in input voltage or load changes. It uses internal circuitry to compare the output voltage to a reference voltage and adjusts the output accordingly to maintain regulation. The IC is capable of delivering high accuracy and low ripple voltage for sensitive circuits.

How Many Pins does LM109K have and What are the Functions of the Pinout Configuration?

The LM109K comes in a metal can TO-5 package with 3 pins. The pinout configuration includes:

Input: The input pin through which the unregulated voltage is supplied.
Output: The output pin providing the regulated voltage.
Common: The common or ground pin for the regulator.

What are the Pros and Cons of LM109K?

Pros:

Precision Regulation: Offers precise and stable output voltage regulation.
Low Ripple: Provides low output voltage ripple for clean power supply.
Reliability: Known for its long-term reliability and robust performance.
Simple Design: Easy to use with minimal external components required for operation.
Wide Operating Temperature: Suitable for a wide range of operating temperatures.

Cons:

Heat Dissipation: May require a heat sink for high power applications to prevent overheating.
Current Limitation: Has a maximum current limitation which needs to be considered for high-current applications.
Fixed Output Voltage: The output voltage is fixed and not adjustable.

Are There Any Equivalents/Alternatives to LM109K for Recommendation?

An equivalent alternative to the LM109K is the LM317 from Texas Instruments, which is an adjustable linear voltage regulator.
Alternatives to the LM109K include the LM723 from Texas Instruments and the LT1083 from Linear Technology.