Design Win

Single-phase PWM controller with light-load efficiency optimization

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The L6739 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 1.5 V and the device supply voltage ranging from 5 V to 12 V bus.

The L6739 device 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 L6739 provides a programmable overcurrent protection and overvoltage protection. The current information is monitored across the inductor DCR.

The L6739 device is available in a VFQFPN 16 - 3 x 3 mm package.

  • 特徴

    • 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 switch
    • 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
    • Overtemperature protection
    • Programmable oscillator up to 600 kHz
    • LS-less to manage pre-bias startup
    • Adjustable output voltage
    • Disable function
    • Internal soft-start
    • VFQFPN 16 - 3 x 3 mm package

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STMicroelectronics - L6739

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