L6986I

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38 V, 5W synchronous iso-buck converter

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Product overview

Description

The L6986I is a device specifically designed for the isolated buck topology. Due to the P-Channel MOSFET as high-side power switch the device features 100% duty cycle operation. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is derived by using a given transformer ratio. No optocoupler is required. The primary sink capability up to 1.9 A (even during soft-start) allows a proper energy transfer to the secondary side as well as enables a tracked soft-start of the secondary output. The control loop is based on a peak current mode architecture and the device operates in forced PWM. The 300 ns blanking time filters oscillations, generated by the transformer leakage inductance, making the solution more robust. Pulse by pulse current sensing on both power elements implements an effective constant current protection in the primary side. Due to the primary reverse current limit, the secondary output is protected against short circuit events. A primary output voltage supervisor, which notifies primary output voltage regulation through the RST open collector output, overvoltage protection, adjustable switching frequency, synchronization and a programmable soft-start are also available.

  • All features

    • Designed for iso-buck topology
    • 4 V to 38 V operating input voltage
    • Primary output voltage regulation / no optocoupler required
    • 1.9 A typical sink peak primary current capability
    • Peak current mode architecture in forced PWM operation
    • 300 ns blanking time
    • 8 µA IQ-SHTDWN
    • Adjustable fSW and synchronization
    • Embedded primary output voltage supervisor
    • Adjustable soft-start time
    • Internal primary current limiting
    • Overvoltage protection
    • RDS(on) HS = 180 mΩ, RDS(on) LS = 150 mΩ
    • Thermal shutdown

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    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-L6986IV1

      Active

      38 V, 5 W synchronous iso-buck converter evaluation board with dual isolated output based on the L6986I

      DC-DC Converter ST
      STEVAL-L6986IV1

      Description:

      38 V, 5 W synchronous iso-buck converter evaluation board with dual isolated output based on the L6986I

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STMicroelectronics - L6986I

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6986ITR
Active
HTSSOP16 Industrial Ecopack2

L6986ITR

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP16

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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L6986ITR Available at distributors

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Active
EAR99 NEC Tape and Reel HTSSOP16 - - PHILIPPINES

L6986ITR Active

Package:
HTSSOP16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L6986ITR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

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-

Max:

-

Country of Origin:

PHILIPPINES

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(*) 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