Up to 3 A step down switching regulator

The ST1S14 is a step-down monolithic power switching regulator able to deliver up to 3 A DC current to the load depending on the application conditions. The high current level is also achieved thanks to a 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 N-channel DMOS transistor (with a typical RDS(on)of 200 mΩ) as the 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 a persistent short-circuit condition.

Key Features

  • 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
  • Embedded compensation network
  • Zero load current operation
  • Internal current limiting
  • Inhibit for zero current consumption
  • 2 mA maximum quiescent current over temperature range
  • 250 mΩ typ. RDS(on)
  • Thermal shutdown

Circuit Diagram

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Design

Technical Documentation

Product Specifications
Description Version Size
DS6966 DS6966: Up to 3 A step-down switching regulator 2.0 2 MB

Publications and Collaterals

Flyers
Description Version Size
DC-DC converters 1.0 554 KB
Brochures
Description Version Size
Brochure Power management guide 05.2016 4 MB
eDesignSuite Support & Community



Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
ST1S14PHR PowerSO-8 Tape And Reel Active - - NEC EAR99 PHILIPPINES MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1S14PHR ActivePowerSO-8IndustrialEcopack2 0 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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