ST1S41:4 A step-down switching regulator

The ST1S41 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. The ST1S41 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.

The ST1S41 integrates 95 mΩ high-side switch and 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.

The peak current mode control with internal compensation delivers a very compact solution with a minimum component count.

The ST1S41 is available in VFQFPN 4 mm x 4 mm 8-lead package and HSOP-8.

Key Features

  • 4 A output current
  • 4.0 V to 18 V input voltage
  • Output voltage adjustable from 0.8 V
  • 850 kHz switching frequency
  • Internal soft-start
  • Integrated 95 mΩ and 69 mΩ power MOSFETs
  • All ceramic capacitor
  • Enable
  • Cycle-by-cycle current limiting
  • Current foldback short-circuit protection
  • VFQFPN 4x4-8L and HSOP-8 packages
产品规格
DescriptionVersionSize
DS9248: 4 A step-down switching regulator2.01 MB
手册
DescriptionVersionSize
Brochure Power management guide05.20167 MB
解决方案评估工具
型号制造商Description
STEVAL-ISA108V14 A, 850 kHz fixed-frequency PWM synchronous step-down demostration board based on the ST1S41 in a VFQFPN package
样片和购买
型号PackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
ST1S41PURVFDFPN 8 4x4x1.0Tape And Reel0.7881000NECEAR99MALAYSIA
ST1S41PHRPowerSO-8Tape And Reel0.7881000NECEAR99PHILIPPINES
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
ST1S41PURVFDFPN 8 4x4x1.0IndustrialEcopack2md_qa-wspc-vfdfpn-wspc--wspc-4x4-wspc-x1.0-wspc-8l-wspc-pitch-wspc-0.65_my3i-wspc-ui64aa5.pdf
md_qa-wspc-vfdfpn-wspc--wspc-4x4-wspc-x1.xml
ST1S41PHRPowerSO-8IndustrialEcopack2md_61-wspc-hsop-wspc-8l-wspc-.150_mb61ui64aa5-wspc-(st1s41phr)-wspc-wcp-wspc-ver2_signed.pdf
md_61-wspc-hsop-wspc-8l-wspc-.150_mb61ui64aa5-wspc-(st1s41phr)-wspc-wcp-wspc-ver2.xml
4 A step-down switching regulator ST1S41
Very low drop voltage regulators with inhibit KFXX
md_qa-wspc-vfdfpn-wspc--wspc-4x4-wspc-x1.0-wspc-8l-wspc-pitch-wspc-0.65_my3i-wspc-ui64aa5.pdf ST1S41
md_qa-wspc-vfdfpn-wspc--wspc-4x4-wspc-x1.xml ST1S41
md_61-wspc-hsop-wspc-8l-wspc-.150_mb61ui64aa5-wspc-(st1s41phr)-wspc-wcp-wspc-ver2_signed.pdf ST1S41
md_61-wspc-hsop-wspc-8l-wspc-.150_mb61ui64aa5-wspc-(st1s41phr)-wspc-wcp-wspc-ver2.xml ST1S41