Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator

The ST2S08B is a dual step-down DC-DC converter optimized for powering low-voltage digital cores in ODD applications and, generally, to replace the high current linear solution when the power dissipation may cause a high heating of the application environment. It provides up to 1.5 A over an input voltage range of 3 V to 5.5 V. A high switching frequency of 1.5 MHz allows the use of tiny surface-mounted components as well as a resistor divider to set the output voltage value. Only an inductor and two capacitors are required. A low output ripple is guaranteed by the current mode PWM topology and the utilization of low ESR SMD ceramic capacitors. The device is thermally protected and current limited. The ST2S08B is available in the QFN12L (4 x 4 mm) package.

Key Features

  • Step-down current mode PWM (1.5 MHz) DC-DC converter
  • Adjustable output voltage from 0.8 V
  • 2 % DC output voltage tolerance
  • Synchronous rectification
  • Integrated current limit
  • Inhibit function
  • Soft-start for start delay of 800 μs typ.
  • Typical efficiency: > 80 % at VOUT = 1.2 V
  • 1.5 A output current capability
  • Non-switching quiescent current: max 1.5 mA over temperature range
  • RDS(ON) 150 mΩ (typ.)
  • Uses tiny capacitors and inductors
  • Available in QFN12L (4 x 4 mm)

Resources

Technical Documentation

Product Specifications
Description Version Size
DS7049 DS7049: Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator 2.0 751 KB

Publications and Collaterals

Brochures
Description Version Size
Brochure Power management guide 05.2016 4 MB
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
ST2S08BPQR VFQFPN 12 4x4x1.0 Tape And Reel Active 0.81 1000 NEC EAR99 MALAYSIA MORE INFO 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**
ST2S08BPQR ActiveVFQFPN 12 4x4x1.0IndustrialEcopack2 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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