L6984

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36 V, 400 mA synchronous step-down switching regulator

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Product overview

Description

The L6984 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 specification like 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 low-side power element implements an effective constant current protection.

  • All features

    • 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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STMicroelectronics - L6984

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6984ATR
Active
DFN10 3X3 Industrial Ecopack2
L6984TR
Active
VFDFPN 4X4X1.0 10L PITCH 0.50 Industrial Ecopack2

L6984ATR

Package:

DFN10 3X3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN10 3X3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6984TR

Package:

VFDFPN 4X4X1.0 10L PITCH 0.50

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFDFPN 4X4X1.0 10L PITCH 0.50

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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L6984ATR
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No availability of distributors reported, please contact our sales office
DFN10 3X3 Tape and Reel THAILAND EAR99 NEC - -

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L6984TR
Available at distributors

Distributor availability of L6984TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
VFDFPN 4X4X1.0 10L PITCH 0.50 Tape and Reel THAILAND EAR99 NEC - -

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L6984ATR Active

Budgetary Price (US$)*/Qty:
-
Package:
DFN10 3X3
Packing Type:
Tape and Reel
RoHS:
-
Country of Origin:
THAILAND
ECCN (US):
EAR99
ECCN (EU):
NEC

Part Number:

L6984ATR

Operating Temperature (°C)

Min:

-

Max:

-

L6984TR Active

Budgetary Price (US$)*/Qty:
-
Package:
VFDFPN 4X4X1.0 10L PITCH 0.50
Packing Type:
Tape and Reel
RoHS:
-
Country of Origin:
THAILAND
ECCN (US):
EAR99
ECCN (EU):
NEC

Part Number:

L6984TR

Operating Temperature (°C)

Min:

-

Max:

-

Distributor Name

Distributor reported inventory date:

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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