LT3502AIMS#PBF

LT3502A is a current mode PWM step-down DC/DC converter with an internal 500mA power switch. The wide input voltage makes the LT3502A suitable for regulating power from a wide variety of sources, including 24V industrial supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and capacitors, resulting in a very small solution. Constant frequency above the AM band avoids interfering with radio reception, making the LT3502A particularly suitable for automotive applications. Cycle-by-cycle current limit and frequency foldback provide protection against shorted outputs. Soft-start and frequency foldback eliminates input current surge during start-up. DA current sense provides further protection in fault conditions. An internal boost diode reduces component count. Typical applications are automotive systems, battery-powered equipment, wall transformer regulation, distributed supply regulation.

• Undervoltage lockout is 2.6 to 3V at TA = 25°C, VIN = 10V, V active-low SHDN = 5V, VBOOST = 15V
• Quiescent current at shutdown is 2µA at V active-low SHDN = 0V, TA = 25°C, VIN = 10V
• Switching frequency is 2.2MHz
• Short-circuit robust, internal boost diode
• Internally compensated
• Maximum duty cycle is 80% at 100mA load, TA = 25°C. VIN = 10V, V active-low SHDN = 5V, VBOOST = 15V
• Feedback voltage is 0.8V
• 10-lead plastic MSOP package
• –40°C to 125°C temperature rating

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