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  • The PM8903A is a high efficiency monolithic step-down switching regulator designed to deliver up to 3 A continuous current. The IC operates from 2.8 V to 6 V input voltage (VIN).

    The PM8903A features low-resistance integrated nMOS and proprietary pulse-skipping mode for optimum efficiency over all the loading range.
    The voltage mode control loop allows the widest range of output filters. Current sense is internally thermally compensated for optimum precision.
    The integrated 0.6 V reference allows the regulation of output voltages with ±1% accuracy over temperature variations. Switching frequency is typically set to 1.1 MHz and can be programmed to 0.8 MHz or 1.0 MHz. Out of phase synchronization allows the reduction of input RMS current.
    The PM8903A provides precise dual-threshold overcurrent protection as well as over/undervoltage and overtemperature protection. PGOOD output easily provides real-time information on the output voltage.
    The PM8903A is available in VFQFPN16 3 x 3 mm.

    Key Features

    • Integrated 35 mΩ MOSFETs for high efficiency
    • 3 A continuous output current
    • 2.8 V to 6 V input voltage (VIN)
    • 2.9 V to 5.5 V supply voltage (VCC)
    • Adjustable output voltage down to 0.6 V
    • 1% output voltage accuracy
    • 1.1 MHz switching frequency operation
    • PSKIP mode to optimize light load efficiency
    • Embedded bootstrap diode
    • Thermally compensated loss-less current sense across HS and LS MOSFETs
    • OV/UV/OC and overtemperature protection
    • Internal soft-start and soft-stop
    • Interleaving synchronization (up to 2 ICs)
    • Power Good output
    • Shutdown function (< 15 μA quiescent current)
    • VFQFPN16 3 x 3 mm compact package

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS9441
      3 A step-down monolithic switching regulator
      1.1
      2.47 MB
      PDF
      DS9441

      3 A step-down monolithic switching regulator

    • Description Version Size Action
      TN1224
      Mounting instructions for SMD (surface mounting device) packages
      2.2
      1.06 MB
      PDF
      TN1224

      Mounting instructions for SMD (surface mounting device) packages

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF

      Electric vehicle (EV) ecosystem

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PM8903ATR
Active
QFN16 3x3 Industrial Ecopack2

PM8903ATR

Package:

QFN16 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

QFN16 3x3

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.

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Sample & Buy

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PM8903ATR Available at 2 distributors

Distributor availability ofPM8903ATR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 3830 1 Order Now
Farnell Element14 EUROPE 3884 1 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

MOUSER

Stock

3830

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3884

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-08

Get sample QFN16 3x3 Tape And Reel
Active
EAR99 PHILIPPINES

PM8903ATR

Package

QFN16 3x3

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

Distributor availability ofPM8903ATR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 3830 1 Order Now
Farnell Element14 EUROPE 3884 1 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

MOUSER

Stock

3830

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3884

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-08

Marketing Status

Active

Budgetary Price (US$)* / Qty

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

(*) 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