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ST1S41PUR

ST1S41PUR

ST1S41PHR

Active

4 A step-down switching regulator

Quantity $ per Unit Savings
1 - 9$2.150%
10 - 24$1.9310%
25 - 99$1.8215%
100 - 249$1.5628%
250 - 499$1.4632%
500$1.2741%
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Out of stock
$2.15
Parameter NameParameter Value
Input Voltage Min Volt4.0
Input Voltage Max Volt18.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
GradeIndustrial
Package NamePowerSO-8

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