38 V 0.5 A synchronous step-down switching regulator with 30 uA quiescent current

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  • The A6985F automotive grade device is a step-down monolithic switching regulator able to deliver up to 0.5 A DC. The output voltage adjustability ranges from 0.85 V to VIN. The 100% duty cycle capability and the wide input voltage range meet the cold crank and load dump specifications for automotive systems. 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 constant and minimizes the output voltage ripple overload current range, meeting the low noise application specification like car audio. The output voltage supervisor manages the reset phase for any digital load (μC, FPGA). The RST open collector output can also 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 both power elements implements an effective constant current protection.

    Key Features

    • AEC-Q100 qualified
    • 0.5 A DC output current
    • 4 V to 38 V operating input voltage
    • Low consumption mode or low noise mode
    • 30 μA IQat light-load (LCM VOUT = 3.3 V)
    • 8 μA IQ-SHTDWN
    • Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN
    • Adjustable fSW (250 kHz - 2 MHz)
    • Embedded output voltage supervisor
    • Synchronization
    • Adjustable soft-start time
    • Internal current limiting
    • Overvoltage protection
    • Output voltage sequencing
    • Peak current mode architecture
    • RDSON HS = 360 mΩ, RDSON LS = 150 mΩ
    • 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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A6985F3V3TR HTSSOP16 Tape And Reel
Active
1.5 10000 EAR99 MALAYSIA No availability of distributors reported, please contact our sales office
A6985FTR HTSSOP16 Tape And Reel
Active
1.5 10000 EAR99 MALAYSIA No availability of distributors reported, please contact our sales office
A6985F HTSSOP16 Tube
Active
1.5 10000 EAR99 MALAYSIA No availability of distributors reported, please contact our sales office
A6985F5VTR HTSSOP16 Tape And Reel
Active
1.5 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofA6985F5VTR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 102 1 Order Now

Distributor reported inventory date: 2019-09-22

Distributor Name

MOUSER

Stock

102

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-22

Buy now
A6985F3V3 HTSSOP16 Tube
Active
1.5 10000 EAR99 MALAYSIA No availability of distributors reported, please contact our sales office Buy now
A6985F5V HTSSOP16 Tube
Active
1.5 10000 EAR99 MALAYSIA No availability of distributors reported, please contact our sales office

A6985F3V3TR

Package

HTSSOP16

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

A6985FTR

Package

HTSSOP16

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

A6985F

Package

HTSSOP16

Packing Type

Tube

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

A6985F5VTR

Package

HTSSOP16

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Distributor availability ofA6985F5VTR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 102 1 Order Now

Distributor reported inventory date: 2019-09-22

Distributor Name

MOUSER

Stock

102

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-22

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

A6985F3V3

Package

HTSSOP16

Packing Type

Tube

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

A6985F5V

Package

HTSSOP16

Packing Type

Tube

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 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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Evaluation Tools

    • Part Number

      38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F5V

      38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS10987
      Automotive 38 V, 500 mA synchronous step-down switching regulator with 30 μA quiescent current
      6.0
      2 MB
      PDF
      DS10987

      Automotive 38 V, 500 mA synchronous step-down switching regulator with 30 μA quiescent current

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      A6985F Pspice model
      270.52 KB
      ZIP
      A6985F3V3 Spice model
      268.35 KB
      ZIP
      A6985F5V Spice model
      267.35 KB
      ZIP

      A6985F Pspice model

      A6985F3V3 Spice model

      A6985F5V Spice model

Publications and Collaterals

    • Description Version Size Action
      A698x family High-performance automotive synchronous DC-DC converters 1.0
      1.13 MB
      PDF

      A698x family High-performance automotive synchronous DC-DC converters

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      Electric vehicle (EV) ecosystem

      Switching Converters (DC-DC) – Quick Reference Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
A6985F
Active
HTSSOP16 Automotive Ecopack1
A6985F3V3
Active
HTSSOP16 Automotive Ecopack1
A6985F3V3TR
Active
HTSSOP16 Automotive Ecopack1
A6985F5V
Active
HTSSOP16 Automotive Ecopack1 (*)
A6985F5VTR
Active
HTSSOP16 Automotive Ecopack1 (*)
A6985FTR
Active
HTSSOP16 Automotive Ecopack1 (*)

A6985F

Package:

HTSSOP16

Material Declaration**:

Marketing Status

Active

Package

HTSSOP16

Grade

Automotive

RoHS Compliance Grade

Ecopack1

A6985F3V3

Package:

HTSSOP16

Material Declaration**:

Marketing Status

Active

Package

HTSSOP16

Grade

Automotive

RoHS Compliance Grade

Ecopack1

A6985F3V3TR

Package:

HTSSOP16

Material Declaration**:

Marketing Status

Active

Package

HTSSOP16

Grade

Automotive

RoHS Compliance Grade

Ecopack1

A6985F5V

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP16

Grade

Automotive

RoHS Compliance Grade

Ecopack1 (*)

A6985F5VTR

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP16

Grade

Automotive

RoHS Compliance Grade

Ecopack1 (*)

A6985FTR

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP16

Grade

Automotive

RoHS Compliance Grade

Ecopack1 (*)

(**) 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.