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L6738

Single Phase PWM Controller with Light-Load Efficiency Optimization
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The L6738 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 the management of conversions with power input VINas low as 1.5 V and the device supply voltage ranging from 5 V to 12 V bus.

The L6738 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 the generation of output voltages with ±0.5% accuracy over line and temperature variations.

The oscillator is programmable up to 600 kHz.

The L6738 provides a programmable dual-level overcurrent protection and overvoltage protection. The current information is monitored across the inductor DCR.

The L6738 is available in a VFQFPN 16 3x3 mm package.

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Errata Sheet
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Datasheet

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

Design Resources

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Technical Documentation

Product Specifications

Description Version Size
pdf
DS7008: Single-phase PWM controller with light-load efficiency optimization
2.0 773 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STEVAL-ISA075V1 High efficiency DC-DC converter - compact solution based on L6738

Sample & Buy

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Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
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Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
L6738TRActiveVFQFPN 16 3x3x1.0Tape And Reel_-Distributor reported inventory date: 2014-09-02
Distributor NameRegionStockMin. order
DIGIKEYOrder NowWORLDWIDE38551
Ecopack2PDF
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(*) 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
(**) 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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