2 A step-down switching regulator

The L7980 device is a step-down switching regulator with a 2.5 A (minimum) current limited embedded Power MOSFET, so it is able to deliver up to 2 A current to the load depending on the application conditions.

The input voltage can range from 4.5 V to 28 V, while the output voltage can be set starting from 0.6 V to VIN.

Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz.

The QFN and the HSOP packages with exposed pad allow reducing the RthJAdown to 60 °C/W and 40 °C/W respectively.

Key Features

  • 2 A DC output current
  • 4.5 V to 28 V input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency, programmable up to 1 MHz
  • Internal soft-start and enable
  • Low dropout operation: 100% duty cycle
  • Voltage feed-forward
  • Zero load current operation
  • Overcurrent and thermal protection
  • VFQFPN 3 x 3 - 8L and HSOP8 package

Circuit Diagram

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Technical Documentation

Product Specifications
Description Version Size
DS5974 DS5974: 2 A step-down switching regulator 6.0 1 MB
Design Notes & Tips
Description Version Size
DN0011 DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration 1.1 359 KB

Publications and Collaterals

Description Version Size
L7980: switching regulator for LED lighting 2.1 232 KB
Description Version Size
Brochure Power management guide 05.2016 3 MB
eDesignSuite Support & Community

Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
L7980TR VDFPN 8 3x3x1.0 Tape And Reel Active 0.678 1000 NEC EAR99 PHILIPPINES MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY
L7980ATR PowerSO-8 Tape And Reel Active 0.719 1000 NEC EAR99 CHINA MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L7980TR ActiveVDFPN 8 3x3x1.0IndustrialEcopack2
L7980A ActivePowerSO-8IndustrialEcopack2 0 0
L7980ATR ActivePowerSO-8IndustrialEcopack2 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.