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Product Specification Section
STMicroelectronics ST1S14PHR - Technical Attributes
Attributes Table
Topology: Buck
Input Voltage: 48V
Output Current-Max: 3A
Output Type: Adjustable
Switching Frequency-Max: 1000kHz
Operating Temp Range: -40°C to +150°C
Duty Cycle-Max: 90%
No. of Outputs: 1
Quiescent Current: 2.4mA
Storage Temperature Range: -65°C to +150°C
Package Style:  HSOP-8
Mounting Method: Surface Mount
Features & Applications

The ST1S14PHR is a step down monolithic power switching regulator able to delivers up to 3 A DC current to the load depending on the application conditions. The high current level is also achieved thanks to an HSOP8 package with exposed frame, that allows to reduce the Rth(JA) down to approximately 40 °C/W.

The output voltage can be set from 1.22 V. The device uses an internal Nchannel DMOS transistor (with a typical RDS(on) of 200 mΩ) as switching element to minimize the size of the external components. The internal oscillator fixes the switching frequency at 850 kHz. Power good open collector output validates the regulated output voltage as soon as it reaches the regulation. Pulse by pulse current limit offers an effective constant current short circuit protection. Current foldback decreases overstress in persistent short circuit condition.


  • 3 A DC output current
  • Operating input voltage from 5.5 V to 48 V
  • 850 kHz internally fixed switching frequency
  • Internal soft start
  • Power good open collector output
  • Current mode architecture
  • mbedded compensation network
  • Zero load current operation
  • Internal current limiting
    Inhibit for zero current consumption
    2 mA maximum quiescent current over temperature range
    250 mΩ typical RDS(on)
    Thermal shutdown


  • Factory automation
  • Printers
  • DC-DC modules
  • High current LED drivers
Pricing Section
Global Stock:
Factory Stock:Factory Stock:
Factory Lead Time:
20 Weeks