LX7219 Series

Synchronous Buck Regulator with I2C

Catalog

Synchronous Buck Regulator with I2C

Part	Supplier Device Package	Synchronous Rectifier	Package / Case	Voltage - Output (Min/Fixed)	Mounting Type	Voltage - Input (Min) [Min]	Frequency - Switching	Operating Temperature [Max]	Operating Temperature [Min]	Function	Voltage - Input (Max) [Max]	Current - Output	Topology	Output Configuration	Number of Outputs	Voltage - Output (Max) [Max]	Output Type
Microchip Technology LX7219-01ILQ-TR	14-VQFN (2x3)		14-PowerVFQFN	0.75 V	Surface Mount	2.7 V	1.2 MHz	85 °C	-40 °C	Step-Down	5.5 V	6 A	Buck	Positive	1	5.5 V	Adjustable
Microchip Technology LX7219-02ILQ-TR	14-VQFN (2x3)		14-PowerVFQFN	0.75 V	Surface Mount	2.7 V	1.2 MHz	85 °C	-40 °C	Step-Down	5.5 V	6 A	Buck	Positive	1	5.5 V	Adjustable

Catalog

Synchronous Buck Regulator with I2C

Key Features

• * 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

Description

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.