38 V 500 mA synchronous step-down switching regulator with 30 uA quiescent current

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  • The L6985F is a step-down monolithic switching regulator able to deliver up to 0.5 A DC. The output voltage adjustability ranges from 0.85V to VIN. Thanks to the P-channel MOSFET high-side power element, the device features 100% of the duty cycle operation. The wide input voltage range meets the specification for the 5 V, 12 V and 24 V power supplies. The “Low Consumption Mode” (LCM) is designed for applications active during the idle mode, so it maximizes the efficiency at the light-load with the controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant overload current range, meeting the low noise application specification. 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 the 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 effective constant current protection.

    Key Features

    • 0.5 A DC output current
    • 4 V to 38 V operating input voltage
    • Low consumption mode or low noise mode
    • 30 μA IQ at light-load (LCM VOUT = 3.3 V)
    • 8 μAIQ-SHTDWN
    • Output voltage 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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Quantity
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Country of Origin
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L6985FTR HTSSOP16 Tape And Reel
Active
1.1 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofL6985FTR

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MOUSER WORLDWIDE 100 1 Order Now

Distributor reported inventory date: 2019-12-08

Distributor Name

MOUSER

Stock

100

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-08

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L6985F HTSSOP16 Tube
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1.1 10000 EAR99 MALAYSIA No availability of distributors reported, please contact our sales office Buy now

L6985FTR

Package

HTSSOP16

Packing Type

Tape And Reel

Unit Price (US$)

1.1*

Distributor availability ofL6985FTR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 100 1 Order Now

Distributor reported inventory date: 2019-12-08

Distributor Name

MOUSER

Stock

100

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-08

Marketing Status

Active

Unit Price (US$)

1.1

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L6985F

Package

HTSSOP16

Packing Type

Tube

Unit Price (US$)

1.1*

Marketing Status

Active

Unit Price (US$)

1.1

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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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS11040
      38 V, 500 mA synchronous step-down switching regulator with 30 µA quiescent current
      2.0
      1.47 MB
      PDF
      DS11040

      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
      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**
L6985F
Active
HTSSOP16 Automotive Ecopack2
L6985FTR
Active
HTSSOP16 Automotive Ecopack2

L6985F

Package:

HTSSOP16

Material Declaration**:

Marketing Status

Active

Package

HTSSOP16

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L6985FTR

Package:

HTSSOP16

Material Declaration**:

Marketing Status

Active

Package

HTSSOP16

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.

eDesignSuite

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Input

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V This option is required. And must be greater than or equal to Volt. Min [V]

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A This option is required and must be a number.

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