PM6644

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350 mA adjustable step-down regulator

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Product overview

Description

The PM6644 is a 350 mA valley current limit step-down regulator capable of delivering an adjustable output voltage in the range between 0.9 V and 8 V. A fixed value of output voltage is also available (3.47 V), saving the external resistor divider. It is housed in a small DFN10 3x3 package. The switching regulator is based on COT (constant-on-time) architecture, that assures fast load transient response; the embedded voltage feed-forward provides nearly constant switching frequency operation. The pulse skipping technique increases efficiency at very light load. The switching frequency can be adjusted from 200 kHz to 600 kHz through a simple resistor. The switching regulator can be programmed to regulate a fixed value of 3.47 V or it can deliver an adjustable voltage, depending on the FB pin set-up.
  • All features

    • 4.5 V to 25 V input voltage range
    • Output voltage VOUT: fixed 3.47 V or adjustable 0.9 V to 8 V
    • 350 mA valley current limit
    • Constant-on-time control
    • Programmable switching frequency
    • Pulse skipping mode (skip mode) at light loads
    • Independent EN signals
    • Latched OVP and UVP

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      AP350/SG5000 Automatic Programming System

      Active

      Automatic programmers for STM MCUs series & PMUs

      Hardware Development Tools from Partners System General
      AP350/SG5000 Automatic Programming System

      Description:

      Automatic programmers for STM MCUs series & PMUs

      T9800/SG8000 Device Programmer

      Active

      Universal programmers for STM MCUs series & PMUs

      Hardware Development Tools from Partners System General
      T9800/SG8000 Device Programmer

      Description:

      Universal programmers for STM MCUs series & PMUs

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STMicroelectronics - PM6644

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PM6644TR
Active
VDFPN 10 3x3x1.0 Industrial Ecopack2

PM6644TR

Package:

VDFPN 10 3x3x1.0

Material Declaration**:

Marketing Status

Active

Package

VDFPN 10 3x3x1.0

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
PM6644TR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel VDFPN 10 3x3x1.0 - - THAILAND

PM6644TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VDFPN 10 3x3x1.0

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

Country of Origin

THAILAND

(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors