Monolithic buck converter for DDR memory termination

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  • The PM8908 is a high efficiency monolithic step-down switching regulator designed mainly for the DDR termination.

    The IC operates from 1 V to 3.5 V input voltage (VIN).
    The device uses a COT control loop that provides very good performances in terms of load and line transients. The current sense is internally thermally compensated for optimum precision.
    The output voltage is adjusted from 0.5 V to 2 V with ± 1% accuracy overtemperature variations.
    The PM8908also provides external tracking support.
    The PM8908 provides positive and negative overcurrent protection as well as over/undervoltage and overtemperature protection. PGOOD output easily provides real-time information on the output voltage.
    The PM8908 is available in a QFN20 3.5 x 4.0 mm package.

    Key Features

    • Integrated MOSFETs for high efficiency
    • Current COT architecture
    • 1 V to 3.5 V input voltage (VIN)
    • 5.0 V supply voltage (VCC)
    • Constant frequency mode
    • 1% output voltage accuracy
    • Two programmable switching frequencies (0.6 MHz or 1 MHz)
    • ADJ output voltage from 0.5 V to 2 V
    • Embedded bootstrap diode
    • OV/UV/OC and overtemperature protection
    • Soft-off with integrated discharge resistor
    • External tracking
    • Power Good output
    • QFN20 3.5 x 4.0 mm compact package

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Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
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PM8908TR QFN20 3.5x4 Tape And Reel
Active
- EAR99 PHILIPPINES Check Availability

Distributor availability ofPM8908TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 92 1 Order Now
AVNET AMERICA 6439 0 Order Now
MOUSER WORLDWIDE 4448 1 Order Now

Distributor reported inventory date: 2019-08-08

Distributor Name

RS COMPONENTS

Stock

92

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

6439

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

4448

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-08-08

Buy now

PM8908TR

Package

QFN20 3.5x4

Packing Type

Tape And Reel

Unit Price (US$)

*

Distributor availability ofPM8908TR

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 92 1 Order Now
AVNET AMERICA 6439 0 Order Now
MOUSER WORLDWIDE 4448 1 Order Now

Distributor reported inventory date: 2019-08-08

Distributor Name

RS COMPONENTS

Stock

92

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

6439

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

4448

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-08-08

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

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

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Technical Documentation

    • Description Version Size Action
      DS10967
      Monolithic buck converter for DDR memory termination
      4.0
      521.17 KB
      PDF
      DS10967

      Monolithic buck converter for DDR memory termination

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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PM8908TR
Active
QFN20 3.5x4 Industrial Ecopack2

PM8908TR

Package:

QFN20 3.5x4

Material Declaration**:

XML

Marketing Status

Active

Package

QFN20 3.5x4

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.