• Constant frequency hysteretic control
• Extremely fast line/load transient response
• I2C for output adjustment (3.4 Mbps)
• 1.2 MHz switching frequency
• Extremely low-RDSON MOSFETS
• Input voltage rail 2.7 V to 5.5 V
• Greater than 6 A output current
• Power save mode for light-load efficiency
• UVLO, OVP, and OCP
• –40 °C to 85 °C ambient temperature
• Available in VQFN 2mm x 3mm 14L package
• RoHS Compliant

The LX7219 is a digitally controlled step-down regulator IC with an integrated 22 mΩ high-side P-channel MOSFET and a 13 mΩ low-side N-channel MOSFET. It features Microsemi's proprietary constant frequency hysteretic control engine for near-instantaneous correction to line/load transients for a voltage range of 2.7 V to 5.5 V, and 6 A constant frequency. It does not require high-ESR output capacitors and incorporates energy-saving power save or pulse skip mode (PSM) at light loads, to extend battery life in mobile applications. The LX7219 has an I C serial interface port for output voltage 2 margining and monitoring, if required (it can also operate in default mode). In addition it includes robust fault monitoring functions. The LX7219 is available in 0.9 V single slave address and 0.8 V default output voltage (no voltage divider is necessary) with four slave addresses. The output voltage can be adjusted with an external voltage divider up to 3.3 V.