The LT1619ES8#PBF is a low voltage current mode PWM Controller for implementing current mode DC/DC converters with minimum external parts. The LT1619 operates with input voltages ranging from 1.9 to 18V and is suitable for a variety of battery-powered and distributed DC/DC converters. The internal rail-to-rail N-channel MOSFET driver operates either from the input in the non-bootstrapped mode or from the output in bootstrapped operation. The driver is designed to drive a low side power transistor in boost, SEPIC, flyback and other topologies. Converter efficiency is improved at heavy loads with a 53mV current sense voltage and at light load with Burst Mode?? operation. The operating frequency is internally set at 300kHz. The oscillator can also be synchronized externally up to 500kHz. No load quiescent current is 140μA and shutdown current is 15μA.
300kHz Fixed frequency current mode control
1A Rail-to-rail N-Channel MOSFET driver
Low 53mV current limit threshold voltage improves efficiency
Implements boost, SEPIC and Flyback converters requiring low side power transistors
Internal current sense amplifier with leading edge blanking
Up to 500kHz external synchronization
Burst Mode? operation for high efficiency at light load
(EN)
