PM6686

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Dual step-down controller with adjustable voltages, adjustable LDO and auxiliary charge pump controller for notebook

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  • PM6686 is a dual step-down controller specifically designed to provide extremely high efficiency conversion, with lossless current sensing technique. The constant on-time architecture assures fast load transient response and the embedded voltage feed-forward provides nearly constant switching frequency operation. Pulse skipping technique increases efficiency at very light load. Moreover a minimum switching frequency of 33 kHz is selectable to avoid audio noise issues. The PM6686 provides a selectable switching frequency, allowing three different values of switching frequencies for the two switching sections. The output voltages OUT1 and OUT2 can be programmed to regulate 1.5 V/5 V and 1.05 V/3.3 V outputs respectively or can deliver two adjustable output voltages. An optional external charge pump can be monitored.

    This device embeds a linear regulator that can provide 3.3 V/5 V or an adjustable voltage from 0.7 V to 4.5 V output. The linear regulator provides up to 100 mA output current. LDO can be bypassed with the switching regulator outputs or with an external power supply (switchover function).
    When in switchover, the LDO output can source up to 200 mA.

    Key Features

    • Latched OVP and UVP
    • Independent Power Good and EN signals
    • Fixed 3.3 V/5.0 V, or adjustable output 0.7 V to 4.5 V, ± 1.5% (LDO): 200 mA
    • Charge pump feedback
    • 2.0 V reference voltage ± 1.0%: 50 μA
    • 3.3 V reference voltage ± 2.0%: 5 mA
    • Selectable pulse skipping at light loads
    • Soft-start internally fixed at 2 ms and soft-stop
    • 5.5 V to 28 V input voltage range
    • Low-side MOSFETs' RDS(on) current sensing and programmable current limit
    • Dual fixed OUT1 = 1.5 V/5 V and OUT2 = 1.05 V / 3.3 V outputs or adjustable OUT1 = 0.7 V to 5.5 V and OUT2 = 0.7 V to 2.5 V outputs, ± 1.5% accuracy over valley regulation
    • Frequency selectable
    • Selectable minimum frequency (33 kHz) in pulse skip mode
    • Constant ON-time control

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Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
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PM6686 QFN32 5x5 Tray
Active
1.321 1000 EAR99 - No availability of distributors reported, please contact our sales office
PM6686TR QFN32 5x5 Tape And Reel
Active
1.321 1000 EAR99 - Check Availability

Distributor availability ofPM6686TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2393 1 Order Now

Distributor reported inventory date: 2020-02-21

Distributor Name

MOUSER

Stock

2393

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-02-21

Buy now

PM6686

Package

QFN32 5x5

Packing Type

Tray

Unit Price (US$)

1.321*

Marketing Status

Active

Unit Price (US$)

1.321

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

PM6686TR

Package

QFN32 5x5

Packing Type

Tape And Reel

Unit Price (US$)

1.321*

Distributor availability ofPM6686TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2393 1 Order Now

Distributor reported inventory date: 2020-02-21

Distributor Name

MOUSER

Stock

2393

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-02-21

Marketing Status

Active

Unit Price (US$)

1.321

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

(*) 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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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS6017
      Dual step-down controller with adjustable voltages, adjustable LDO and auxiliary charge pump controller for notebook
      4.2
      1.04 MB
      PDF
      DS6017

      Dual step-down controller with adjustable voltages, adjustable LDO and auxiliary charge pump controller for notebook

    • Description Version Size Action
      AN2937
      Power system demonstration kit based on the PM6686 dual step-down controller with adjustable voltages and adjustable LDO
      1.1
      1.26 MB
      PDF
      AN2938
      Power system demonstration kit based on the PM6686 dual step-down controller with adjustable voltages and adjustable LDO
      1.0
      1.76 MB
      PDF
      AN2937

      Power system demonstration kit based on the PM6686 dual step-down controller with adjustable voltages and adjustable LDO

      AN2938

      Power system demonstration kit based on the PM6686 dual step-down controller with adjustable voltages and adjustable LDO

    • 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

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PM6686
Active
QFN32 5x5 Industrial Ecopack2
PM6686TR
Active
QFN32 5x5 Industrial Ecopack2

PM6686

Package:

QFN32 5x5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

QFN32 5x5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

PM6686TR

Package:

QFN32 5x5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

QFN32 5x5

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.

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