DESCRIPTION

The a high performance buck boost converter that the output voltage can be programmed from 0.9V up to 20V through external resistor. The XR3651 implements the Buck Boost converter with a single inductor architecture that operates from input voltages above, below or equal to the output voltage. And support 2-switch boost mode for higher efficiency. The integrated low Rds(on) MOSFET minimizes physical footprint, maximizes efficiency, which reduces the power dissipation. Constant current control is utilized to protect the device from overshooting in unwanted conditions. Built-in loop compensation simplifies the circuit and design. XR3651 guarantees robustness with under voltage lockout, short circuit protection and thermal protection. 

FEATURES

Integrate low RDS (on) power MOSFET

Wide VINrange:3.0V-21V

Wide VO range:0.9V-20V

Compatible with 4-switch buck-boost mode and 2-switch boost mode.

Fixed frequency 450kHz

Programmable input and output current limit

Output Constant Current Control.

Quiescent current: <60uA

Integrate output short protection

Integrate thermal protection

QFN3*4 package