DESCRIPTION
The LT®1618 step-up DC/DC converter combines a traditional voltage feedback loop and a unique current feedback loop to operate as a constant-current, constant-voltage source. This fixed frequency, current mode switcher operates from a wide input voltage range of 1.6V to 18V, and the high switching frequency of 1.4MHz permits the use of tiny, low profile inductors and capacitors. The current sense voltage is set at 50mV and can be adjusted using the IADJ pin.

FEATURES
■ Accurate Input/Output Current Control: ±5% Over Temperature
■ Accurate Output Voltage Control: ±1%
■ Wide VIN Range: 1.6V to 18V
■ 1.4MHz Switching Frequency
■ High Output Voltage: Up to 35V
■ Low VCESAT Switch: 200mV at 1A
■ Available in (3mm × 3mm × 0.8mm) 10-Pin DFN and 10-Pin MSOP Packages

APPLICATIONS
■ LED Backlight Drivers
■ USB Powered Boost/SEPIC Converters
■ Input Current Limited Boost/SEPIC Converters
■ Battery Chargers