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Switching Voltage Regulators LT1373 - 250kHz Low Supply Current High Efficiency 1.5A Switching Regulator


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  • Part Number : LT1373CN8

  • Package/Case : PDIP-8

  • Brands : ADI

  • Components Categories : Voltage Regulators & Voltage ControllersSwitching Voltage Regulators

  • Datesheet : LT1373CN8 DataSheet (PDF)

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Overview of LT1373CN8

The LT1373CN8 is a high-performance step-down switching regulator designed to provide efficient and precise voltage regulation. This regulator is part of the LT1373 series, known for its versatility, wide input voltage range, and compact design, making it an ideal choice for various power supply applications where high efficiency is crucial.


Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.

  • SW (Pin 1): Switching node connection for the internal power switch.
  • GND (Pin 2): Ground reference for the regulator.
  • FB (Pin 3): Feedback input for regulating the output voltage.
  • SHDN (Pin 4): Shutdown control input.
  • VOUT (Pin 5): Regulated output voltage.
  • VFB (Pin 6): Voltage feedback for output regulation.
  • SENSE (Pin 7): Voltage sense input for remote load sensing.
  • VIN (Pin 8): Input voltage supply.

Circuit Diagram

Incorporate a circuit diagram that illustrates the connections and operation of the LT1373CN8 switching regulator for a more visual representation.

The circuit diagram above depicts a typical application of the LT1373CN8 switching regulator. External components, such as inductors and capacitors, are connected to achieve stable and regulated power output.

Key Features

  • Step-Down Switching Regulator: The LT1373CN8 operates as a step-down switching regulator, efficiently converting a higher input voltage to a lower output voltage.
  • Wide Input Voltage Range: With a wide input voltage range, this regulator accommodates various input sources, making it suitable for applications with diverse power supply conditions.
  • High Efficiency: The LT1373CN8 is designed for high efficiency, reducing power dissipation and contributing to energy-conscious designs.
  • Adjustable Output Voltage: The device features an adjustable output voltage, providing flexibility in tailoring the output to specific application requirements.

Note: For detailed technical specifications, please refer to the LT1373CN8 datasheet.


  • Power Supplies: Ideal for generating regulated power supplies in various electronic systems.
  • Battery-Powered Devices: Suitable for battery-operated devices, ensuring efficient power management.
  • Embedded Systems: Applied in embedded systems for voltage regulation and stabilization.
  • DC-DC Converters: Used in DC-DC converter applications for voltage step-down requirements.


The LT1373CN8 efficiently steps down input voltage to regulate the output voltage, providing stable power for connected devices. Its adjustable output voltage and high efficiency make it versatile for different applications.

Usage Guide

  • Input Power Connection: Connect the VIN pin (Pin 8) to the input power source.
  • Output Connection: Connect the VOUT pin (Pin 5) to the load requiring regulated power.
  • Feedback Adjustment: Adjust the feedback voltage at the FB pin (Pin 3) to set the desired output voltage.


For similar functionalities, consider these alternatives to the LT1373CN8:

LM2678-ADJ: A similar adjustable step-down switching regulator.
MAX5035: An alternative with comparable features for step-down voltage regulation.
LM2576: Another adjustable step-down switching regulator option.

Frequently Asked Questions

Q: Can the LT1373CN8 handle high input voltages?
A: Yes, the LT1373CN8 is designed to handle a wide range of input voltages. Refer to the datasheet for specific limits.

Q: Is remote load sensing necessary for the LT1373CN8?
A: Remote load sensing (SENSE pin) is optional but can be beneficial for applications with significant load variations. Consult the datasheet for guidance.


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

Source Content uid LT1373CN8 Rohs Code No
Part Life Cycle Code Transferred Ihs Manufacturer LINEAR TECHNOLOGY CORP
Part Package Code DIP Package Description DIP, DIP8,.3
Pin Count 8 Manufacturer Package Code N
Reach Compliance Code not_compliant ECCN Code EAR99
HTS Code 8542.39.00.01 Analog IC - Other Type SWITCHING REGULATOR
Input Voltage-Max 25 V Input Voltage-Min 2.7 V
Input Voltage-Nom 5 V JESD-30 Code R-PDIP-T8
JESD-609 Code e0 Moisture Sensitivity Level 1
Number of Functions 1 Number of Terminals 8
Operating Temperature-Max 70 °C Operating Temperature-Min
Output Current-Max 1.5 A Output Voltage-Nom 1.245 V
Package Body Material PLASTIC/EPOXY Package Code DIP
Package Equivalence Code DIP8,.3 Package Shape RECTANGULAR
Package Style IN-LINE Qualification Status Not Qualified
Seated Height-Max 3.937 mm Supply Current-Max (Isup) 1.5 mA
Surface Mount NO Switcher Configuration BOOST
Switching Frequency-Max 275 kHz Technology BIPOLAR
Temperature Grade COMMERCIAL Terminal Finish TIN LEAD
Terminal Form THROUGH-HOLE Terminal Pitch 2.54 mm
Terminal Position DUAL Width 7.62 mm
Product Category Switching Voltage Regulators RoHS No&nbsp-RoHS Version Available
Output Voltage Adjustable Output Current 1.5 A
Input Voltage, Max 30 V Number of Outputs 1 Output
Topology Buck, Boost, Cuk, Flyback, Inverting Package / Case PDIP-8
Mounting Style Through Hole Switching Frequency 250 kHz
Minimum Operating Temperature 0 C Maximum Operating Temperature + 125 C
Series LT1373 Input Voltage, Min 2.7 V
Brand Analog Devices Operating Supply Current 1 mA
Product Type Switching Voltage Regulators Subcategory PMIC - Power Management ICs

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