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  • The L6738A is a single-phase step-down controller with integrated high-current drivers that provides complete control logic and protection to realize a DC-DC converter.

    The device flexibility allows to manage conversions with power input VINas low as 1.5V and the device supply voltage ranging from 5 V to 12 V bus.
    The L6738A features a proprietary algorithm that allows Light-Load efficiency optimization, boosting efficiency without compromising the output voltage ripple.
    The integrated 0.8 V reference allows generation of output voltages with ±0.5% accuracy over line and temperature variations.
    The oscillator is programmable up to 600 kHz.
    The L6738A provides a programmable overcurrent protection and overvoltage protection. The current information is monitored across the inductor DCR.
    The L6738A is available in a VFQFPN 16 3x3 mm package.

    Key Features

    • Flexible power supply from 5 V to 12 V bus
    • Power conversion input as low as 1.5 V
    • Light-load efficiency optimization
    • Embedded bootstrap diode
    • VIN detector
    • 0.8 V internal reference
    • 0.5% output voltage accuracy
    • Remote GND recovery
    • High-current integrated drivers
    • Sensorless and programmable precise-OC sense across Inductor DCR
    • OV protection
    • Programmable oscillator up to 600 kHz
    • LS-less to manage pre-bias startup
    • Adjustable output voltage
    • Disable function
    • Internal soft-start
    • VFQFPN 16 3x3 mm package

Circuit Diagram

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Technical Documentation

    • Description Version Size Action
      DS7009
      Single-phase PWM controller with light-load efficiency optimization
      2.0
      740.21 KB
      PDF
      DS7009

      Single-phase PWM controller with light-load efficiency optimization

    • Description Version Size Action
      TN1224
      Mounting instructions for SMD (surface mounting device) packages
      2.2
      1.06 MB
      PDF
      TN1224

      Mounting instructions for SMD (surface mounting device) packages

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6738ATR
Active
VFQFPN 16 3x3x1.0 Industrial Ecopack2

L6738ATR

Package:

VFQFPN 16 3x3x1.0

Material Declaration**:

Marketing Status

Active

Package

VFQFPN 16 3x3x1.0

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.

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L6738ATR Available at 1 distributors

Distributor availability ofL6738ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 825 1 Order Now

Distributor reported inventory date: 2020-08-01

Distributor Name

DIGIKEY

Stock

825

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-01

Active
EAR99 NEC Tape And Reel VFQFPN 16 3x3x1.0 - - PHILIPPINES

L6738ATR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofL6738ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 825 1 Order Now

Distributor reported inventory date: 2020-08-01

Distributor Name

DIGIKEY

Stock

825

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-01

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFQFPN 16 3x3x1.0

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

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