LM345 The LM345 is a voltage regulator from National Semiconductor. It features an 11.5V output voltage and operates within an input voltage range of 8.5V to 20V.
Mfr Part #:

LM345

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
The LM345 is a voltage regulator from National Semiconductor. It features an 11.5V output voltage and operates within an input voltage range of 8.5V to 20V.
✓ Total Stock: 200,000 pcs
$ Price Range: $0.99

LM345 Available from 1 distributor

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✓ Non-Authorised
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LM345 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Mounting Type
Output Voltage
Power Dissipation
Quiescent Current
SVHC Present

LM345 Description

Short technical summary and product information.

The LM345 is a voltage regulator manufactured by National Semiconductor, designed for reliable performance in various applications. It offers a fixed output voltage of 11.5V with an accuracy better than 2%. The device operates with an input voltage range from 8.5V to 20V and can handle an input-output voltage differential of up to 2.8V at full rated load across its operating temperature range.

 

Key features include constant current limiting with temperature, internal thermal shutdown protection, and regulation guaranteed with 25W power dissipation. The LM345 is capable of delivering up to 3A of output current. It requires only one external component for operation, simplifying circuit design.

 

This regulator is housed in a TSSOP package, suitable for surface mounting. It operates within a temperature range of -40°C to 125°C, making it suitable for demanding environments. The LM345 is designed for applications requiring a stable and regulated voltage supply.

LM345 Quick Information

Product Type: Voltage Regulator
Canonical Name: LM345 Voltage Regulator

LM345 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

LM345 Estimated Pricing

Qty Low High
1+ $0.99 $0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

LM345 Features

  • Fixed 11.5V output voltage.
  • Input voltage range of 8.5V to 20V.
  • Guaranteed 3A output current.
  • Internal thermal shutdown protection.
  • Surface mount TSSOP package.

LM345 Applications

  • Provides stable voltage regulation.
  • Suitable for power supply circuits.
  • Designed for wide temperature ranges.
  • Simplifies circuit design with few components.

LM345 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the input voltage range for the LM345?

The input voltage range is 8.5V to 20V.

What is the output voltage of the LM345?

The output voltage is 11.5V fixed.

What is the maximum output current of the LM345?

The LM345 guarantees 3A output current.

What is the package type for the LM345?

The LM345 comes in a 16-TSSOP surface mount package.

What is the operating temperature range of the LM345?

The operating temperature range is -40°C to 125°C.

What is the quiescent current of the LM345?

The typical quiescent current is 1.6 mA.

Does the LM345 have a constant current limit with temperature?

Yes, the current limit is constant with temperature.

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