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3A 27V Synchronous Buck Converter

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The LSP5523 is a monolithic synchronous buck regulator. The device integrates 90mΩ MOSFETS that provide
3A continuous load current over a wide operating input voltage of 4.5V to 27V. Current mode control provides
fast transient response and cycle-by-cycle current limit. An adjustable soft-start prevents inrush current at turn on.


  • 3A Output Current
  • Wide 4.5V to 27V Operating Input Range
  • Fixed 340KHZ Frequency
  • Integrated Power MOSFET Switches
  • Output Adjustable from 0.925V to 0.8Vin
  • Up to 93% Efficiency
  • Programmable Soft-Start
  • Stable with Low ESR Ceramic Output Capacitors
  • Cycle by Cycle Over Current Protection
  • Short Circuit Protection
  • Input Under Voltage Lockout
  • Package: ESOP-8L
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device 


  • Distributed power systems
  • Networking systems
  • FPGA, DSP, ASIC power supplies
  • Green electronics/ appliances
  • Notebook computers

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Type Buck
Minimum Input Voltage (V) 4.5
Maximum Input Voltage (V) 27
Output Current (A) 3
Minimum Output Voltage (V) 0.925
Maximum Output Voltage (V) 0.8Vin
Quiescent Current Typ (µA) 1300
Shutdown Current Typ (µA) 0.3
Frequency Typ (kHz) 340
HS RDS(ON) (mΩ) 90
LS RDS(ON) (mΩ) 70

Related Content


Technical Documents

Recommended Soldering Techniques


Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
Request Samples
Qty. Carrier
LSP5523-R8A Active SO-8EP TPGP 2500 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
RS Components - Spain 2500 10/2/2022 Spain Contact Sales
RS Components - UK 2500 10/2/2022 England Buy Now
Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free