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  • The ST1S30 is a step-down DC-DC converter optimized for powering low output voltage applications. It supplies a current in excess of 3 A over an input voltage range from 2.7 V to 6 V.

    A high PWM switching frequency (1.5 MHz) allows the use of tiny surface-mount components.
    Moreover, since the required synchronous rectifier is integrated, the number of the external components is reduced to minimum: a resistor divider, an inductor and two capacitors. The Power Good function continuously monitors the output voltage. An open drain Power Good flag is released when the output voltage is within regulation. In addition, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors. The device is thermally protected and the output current limited to prevent damages due to accidental short circuit. The ST1S30 is available in the DFN8 (4 x 4 mm) package.

    Key Features

    • 1.5 MHz fixed frequency PWM with current control mode
    • 3 A output current capability
    • Typical efficiency: > 90%
    • 2 % DC output voltage tolerance
    • Two versions available: power good or inhibit
    • Integrated output over-voltage protection
    • Non switching quiescent current: (typ) 1.5 mA over temperature range
    • RDSon (typ) 100 mΩ
    • Utilizes tiny capacitors and inductors
    • Operating junction temp. -25 °C to 125 °C
    • Available in DFN8 (4 x 4 mm) exposed pad

Circuit Diagram

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Sample & Buy

Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
ST1S30IPUR DFN8 4x4 Tape And Reel
Active
0.624 10000 EAR99 MALAYSIA No availability of distributors reported, please contact our sales office

ST1S30IPUR

Package

DFN8 4x4

Packing Type

Tape And Reel

Unit Price (US$)

0.624*

Marketing Status

Active

Unit Price (US$)

0.624

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

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS6941
      3 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification
      1.1
      195.79 KB
      PDF
      DS6941

      3 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification

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**
ST1S30IPUR
Active
DFN8 4x4 Industrial Ecopack2

ST1S30IPUR

Package:

DFN8 4x4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN8 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.