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L6928：High efficiency monolithic synchronous step down regulator

The device is a DC-DC monolithic regulator specifically designed to provide high efficiency. The L6928 supply voltage can be as low as 2 V to be used in single Li-Ion cell supplied applications. Output voltage can be selected by an external divider down to 0.6 V. Duty cycle can saturate 100% allowing low-dropout operation. The device is based on a 1.4 MHz fixed frequency, current mode architecture. Low consumption mode operation can be selected at light load conditions, allowing switching losses to be reduced. The L6928 is externally synchronized by a clock, which makes it useful in noise sensitive applications. Other features like Power Good, overvoltage protection, short-circuit protection and thermal shutdown (150 °C) are also present.

Key Features

• 2 V to 5.5 V battery input range
• High efficiency: up to 95%
• Internal synchronous switch
• No external Schottky diode required
• Extremely low quiescent current
• 1 µA max. shutdown supply current
• 800 mA max. output current
• Adjustable output voltage from 0.6 V
• Low-dropout operation: up to 100% duty cycle
• Selectable low noise/low consumption mode at light load
• Power Good signal
• ± 1% output voltage accuracy
• Current mode control
• 1.4 MHz switching frequency
• Externally synchronized from 1 MHz to 2 MHz
• OVP
• Short-circuit protection

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