LT3493EDCB#TRMPBF

LT®3493 is a current mode PWM step-down DC/DC converter with an internal 1.75A power switch. The wide operating input range of 3.6V to 36V (40V maximum) makes this ideal for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The low current (<lt/>2μA) shutdown mode provides output disconnect, enabling easy power management in battery-powered systems. Typical applications are automotive battery regulation, industrial control supplies, wall transformer regulation, distributed supply regulation, battery-powered equipment.

• 1.2A output current, fixed frequency operation is 750KHz
• Output adjustable down to 780mV, short-circuit robust
• Uses tiny capacitors and inductors, soft-start
• Internally compensated, low shutdown current: <lt/>2μA, low VCESAT switch: 330mV at 1A
• Undervoltage lockout range from 3.1 to 3.6V
• Feedback voltage range from 765 to 795mV (TA=25°C. VIN=12V, VBOOST=17V)
• Quiescent current in shutdown is 2µA (V active-low SHDN=0V)
• Switching frequency is 815KHz (VFB=0.7V)
• 6-lead plastic DFN package
• Temperature rating range from –40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party