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L6728AH：High frequency single phase PWM controller with Power Good

The L6728AH is a single phase step-down controller with integrated high-current drivers, that provides complete control logic and protection to realize in a simple way general DC-DC converters by using a compact VFDFPN 10 package.

Device flexibility allows managing conversions with power input V_IN as low as 1.5 V and device supply voltage ranging from 5 V to 12 V.

The L6728AH device provides a simple control loop with the voltage mode EA. The integrated 0.8 V reference allows regulating output voltages with ± 0.8% accuracy over line and temperature variations. The oscillator is internally fixed to 600 kHz.

The L6728AH provides programmable dual level overcurrent protection as well as over and undervoltage protection. Current information is monitored across the low-side MOSFET R_DS(on) saving the use of expensive and space-consuming sense resistors.

The PGOOD output easily provides real-time information on output voltage status, through VSEN dedicated output monitor.

Key Features

• Flexible power supply from 5 V to 12 V
• Power conversion input as low as 1.5 V
• 0.8 V internal reference
• 0.8% output voltage accuracy
• High-current integrated drivers
• Power Good output
• Sensorless and programmable OCP across low-side RDS(on)
• OV / UV protections
• VSEN disconnection protection
• Oscillator internally fixed at 600 kHz
• LS-less to manage pre-bias startup
• Adjustable output voltage
• Disable function
• Internal soft-start
• VFDFPN 10 package

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