LT3505

Input Voltage (V_IN) ....................................................40V
BOOST Pin Voltage ..................................................50V
BOOST Pin Above SW Pin .........................................25V
SHDN Pin ..................................................................40V
FB Pin .........................................................................6V
V_C Pin .........................................................................3V
R_T Pin .........................................................................3V
Operating Temperature Range (Note 2)
     LT3505E .............................................. 40 to 85
     LT3505I ............................................. 40 to 125
Maximum Junction Temperature .......................... 125
Storage Temperature Range ................... 65 to 150

The LT^®3505 is a current mode PWM step-down DC/DC converter with an internal 1.4A power switch. The wide operating input range of 3.6V to 36V (40V maximum) makes the LT3505 ideal for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries. The oscillator can be programmed for high frequency operation allowing the use of tiny, low cost external components or it can be programmed for lower frequency operation to maximize effi ciency.

Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The low current (<2A) shutdown mode provides output disconnect, enabling easy power management in battery-powered systems.