L7985:2A step-down switching regulator

The L7985/A 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 38 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 the reduction of RthJAdown to 60 °C/W and 40 °C/W respectively.

Key Features

  • 2 A DC output current
  • 4.5 V to 38 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 - 10L and HSOP8 package
Product Specifications
DescriptionVersionSize
DS8733: 2 A step-down switching regulator7.01 MB
Design Notes & Tips
DescriptionVersionSize
DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration1.1359 KB
HW Model & CAD Libraries
DescriptionVersionSize
X798X Pspice model2 MB
Flyers
DescriptionVersionSize
DC-DC converters557 KB
Brochures
DescriptionVersionSize
Brochure Power management guide05.20164 MB
Solution Evaluation Tools
Part NumberManufacturerDescription
STEVAL-ISA097V12 A step-down switching demonstration board based on the L7985 in DFN10 package
STEVAL-ISA098V12 A step-down switching demonstration board based on the L7985A in HSOP8 package
Sample & Buy
Part NumberPackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
L7985APowerSO-8Tube0.7911000NECEAR99CHINA
L7985ATRPowerSO-8Tape And Reel0.7911000NECEAR99CHINA
L7985TRVDFPN 10 3x3x1.0Tape And Reel0.7511000NECEAR99PHILIPPINES
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
L7985APowerSO-8IndustrialEcopack2
L7985ATRPowerSO-8IndustrialEcopack2
L7985TRVDFPN 10 3x3x1.0IndustrialEcopack2md_wq-wspc-vdfpn-wspc-3x3x1.0-wspc-10-wspc-pitch-wspc-0.50_a5wqua50ba5-wspc-(l7985).pdf
md_wq-wspc-vdfpn-wspc-3x3x1.xml
2 A step-down switching regulator L7985
ST1S03 alternative topology: Using a buck in a negative buck-boost configuration L5986
ST1S03 alternative topology: Using a buck in a negative buck-boost configuration L7985
ST1S03 alternative topology: Using a buck in a negative buck-boost configuration L7985
Very low drop voltage regulators with inhibit KFXX
md_wq-wspc-vdfpn-wspc-3x3x1.0-wspc-10-wspc-pitch-wspc-0.50_a5wqua50ba5-wspc-(l7985).pdf L7985
md_wq-wspc-vdfpn-wspc-3x3x1.xml L7985