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ST1S32PUR

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4 A DC step-down switching regulator

Quantity $ per Unit Savings
1 - 9$2.000%
10 - 24$1.8010%
25 - 99$1.7015%
100$1.4528%
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Parameter NameParameter Value
Input Voltage Min Volt2.8
Input Voltage Max Volt5.5
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
GradeIndustrial
Package NameDFN8 4x4

The ST1S32 is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. The ST1S32 operates from 2.8 V to 5.5 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.


The ST1S32 integrates a 60 mΩ high-side switch and a 45 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 ST1S32 is available in 4 mm x 4 mm, 8-lead VFDFPN package.

Key features
  • 4 A DC output current
  • 2.8 V to 5.5 V input voltage
  • Output voltage adjustable from 0.8 V
  • 1.5 MHz switching frequency
  • Internal soft-start and enable
  • Integrated 60 mΩ and 45 mΩ Power MOSFETs
  • All ceramic capacitor
  • Power Good (POR)
  • Cycle-by-cycle current limiting
  • Current foldback short-circuit protection
  • VFDFPN 8 4x4x1.0 package