36 V 400 mA synchronous step-down switching regulator

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  • The A6984 is a step-down monolithic switching regulator able to deliver up to 400 mA DC. The output voltage adjustability ranges from 0.9 V. The fixed 3.3 V VOUT requires no external resistor divider. The “low consumption mode” (LCM) is designed for applications active during car parking, so it maximizes the efficiency at light load with controlled output voltage ripple. The “low noise mode” (LNM) makes the switching frequency almost constant over the load current range, serving low noise application specifications such as car audio/sensors. The PGOOD open collector output can implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium-heavy load, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing on the low-side power element implements effective constant current protection. The package lead finishing guarantees side solderability, thus allowing visual inspection during manufacturing.

    Key Features

    • AEC-Q100 qualified
    • 400 mA DC output current
    • 4.5 V to 36 V operating input voltage
    • Synchronous rectification
    • Low consumption mode or low noise mode
    • 75 µA IQ at light load (LCM VOUT = 3.3 V)
    • 13 µA IQ-SHTDWN
    • Adjustable fSW (250 kHz - 600 kHz)
    • Output voltage adjustable from 0.9 V
    • No resistor divider required for 3.3 V VOUT
    • VBIAS maximizes efficiency at light load
    • 350 mA valley current limit
    • Constant on-time control scheme
    • PGOOD open collector
    • Thermal shutdown

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Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
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A6984TR VFDFPN 4X4X1.0 10L PITCH 0.50 Tape And Reel
Active
1.5 10000 EAR99 PHILIPPINES Check Availability

Distributor availability ofA6984TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 700 1 Order Now
MOUSER WORLDWIDE 998 1 Order Now
Farnell Element14 EUROPE 120 1 Order Now

Distributor reported inventory date: 2019-09-17

Distributor Name

DIGIKEY

Stock

700

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

998

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

120

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-17

Get sample

A6984TR

Package

VFDFPN 4X4X1.0 10L PITCH 0.50

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Distributor availability ofA6984TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 700 1 Order Now
MOUSER WORLDWIDE 998 1 Order Now
Farnell Element14 EUROPE 120 1 Order Now

Distributor reported inventory date: 2019-09-17

Distributor Name

DIGIKEY

Stock

700

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

998

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

120

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-17

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

10000

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
      DS12051
      36 V, 400 mA automotive synchronous step-down switching regulator
      3.0
      4.02 MB
      PDF
      DS12051

      36 V, 400 mA automotive synchronous step-down switching regulator

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    • Description Version Size Action
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      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
A6984TR
Active
VFDFPN 4X4X1.0 10L PITCH 0.50 Automotive Ecopack2

A6984TR

Package:

VFDFPN 4X4X1.0 10L PITCH 0.50

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFDFPN 4X4X1.0 10L PITCH 0.50

Grade

Automotive

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.