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Buck Switching Regulator IC Positive Adjustable 1.235V 1 Output 2A 8-SOIC (0.154", 3.90mm Width) Exposed Pad

ISO14001 ISO9001 DUNS

Brands: STMicroelectronics, Inc

Mfr.Part #: L5973ADTR

Datasheet: L5973ADTR Datasheet (PDF)

Package/Case: HSOP-8

Product Type: Voltage Regulators - DC DC Switching Regulators

RoHS Status:

Stock Condition: 2507 pcs, New Original

Warranty: 1 Year Ovaga Warranty - Find Out More

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L5973ADTR General Description

The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2A so it is able to deliver more than 1.5 A DC current to the load depending on the application conditions.The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the RthJAdown to approximately 40 °C/W.The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components.Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications.Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.



  • Inhibit for zero current consumption
  • Internal current limiting
  • Protection against feedback disconnection
  • Synchronization
  • Thermal shutdown
  • Voltage feedforward
  • 500 kHz Internally fixed frequency
  • 2 A Internal switch
  • 3.3 V / (±2 %) reference voltage
  • Operating input voltage from 4 V to 36 V
  • Low dropout operation: 100 % duty cycle
  • Zero load current operation
  • Output voltage adjustable from 1.235 V to 35 V


Parameter Value Parameter Value
feature-type Synchronous Step Down feature-maximum-power-dissipation-mw
feature-packaging Tape and Reel feature-rad-hard
feature-pin-count 8 feature-supplier-package HSOP EP
feature-standard-package-name1 SOP feature-cecc-qualified No
feature-esd-protection feature-escc-qualified
feature-military No feature-aec-qualified No
feature-aec-qualified-number feature-auto-motive No
feature-p-pap No feature-eccn-code EAR99
feature-svhc No


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TNT TNT $20.00-$40.00 (0.50 KG) 2-5 days
EMS EMS $20.00-$40.00 (0.50 KG) 2-5 days
REGISTERED AIR MAIL REGISTERED AIR MAIL $20.00-$40.00 (0.50 KG) 2-5 days

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1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


  • Product

    Step1 :Product

  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

  • Packaging boxes

    Step5 :Packaging boxes

  • bar-code shipping tag

    Step6 :bar-code shipping tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

  • ESD
  • ESD

Part points

  • The L5973ADTR chip is a voltage regulator that is commonly used in electronic devices. It can provide a stable output voltage from an input voltage source. With a high efficiency and a wide input voltage range, it is suitable for a variety of applications. The chip includes features such as overcurrent and thermal protection, making it reliable and safe to use.
  • Equivalent

    The equivalent products of the L5973ADTR chip are ST Microelectronics L5973AD013TR, L5973ADTR-016, and L5973D013TR.
  • Features

    The features of L5973ADTR include a wide input voltage range from 4.375V to 36V, a high switching frequency up to 1.5MHz, adjustable and fixed output voltage options, a maximum output current of 2A, integrated internal compensation and protection features, and high efficiency operation.
  • Pinout

    The L5973ADTR is a power management IC with a 16-pin surface mount package. It functions as a step-down switching regulator, providing efficient voltage conversion for various applications. The pins include power input and output pins, feedback pin, enable pin, and other control and protection pins.
  • Manufacturer

    The manufacturer of the L5973ADTR is STMicroelectronics, which is a multinational semiconductor company.
  • Application Field

    The L5973ADTR is a voltage regulator that can be used in various applications, including industrial and consumer electronics. It is commonly employed in power supplies, battery chargers, set-top boxes, and telecommunication equipment. This device is designed to provide a stable and regulated output voltage, making it suitable for a wide range of electronic devices.
  • Package

    The L5973ADTR chip is available in a surface mount package type called PowerSO-10. Its form is a monolithic integrated circuit. Its dimensions are 9.7mm x 6.3mm x 2.3mm (excluding leads).

Datasheet PDF

Preliminary Specification L5973ADTR PDF Download

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