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

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  • 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)

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Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
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ST2S08BPQR QFN12 4x4 Tape And Reel
Active
0.81 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofST2S08BPQR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 60 1 Order Now

Distributor reported inventory date: 2019-09-16

Distributor Name

DIGIKEY

Stock

60

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-16

ST2S08BPQR

Package

QFN12 4x4

Packing Type

Tape And Reel

Unit Price (US$)

0.81*

Distributor availability ofST2S08BPQR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 60 1 Order Now

Distributor reported inventory date: 2019-09-16

Distributor Name

DIGIKEY

Stock

60

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-16

Marketing Status

Active

Unit Price (US$)

0.81

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 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

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Technical Documentation

    • Description Version Size Action
      DS7049
      Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator
      2.0
      751.89 KB
      PDF
      DS7049

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

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      Electric vehicle (EV) ecosystem

      Switching Converters (DC-DC) – Quick Reference Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST2S08BPQR
Active
QFN12 4x4 Industrial Ecopack2

ST2S08BPQR

Package:

QFN12 4x4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

QFN12 4x4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.