LT3509 Datasheet | Linear Technology

.. LT3509 Dual 36V, 700m A Step-Down Regulator DESCRIPTION The LT®3509 is a dual, current mode, step-down switching regulator, with internal power switches each capable of providing 700m A output current. This regulator provides a pact and robust solution for multi-rail systems in harsh environments. It incorporates several protection Features including overvoltage lockout and cycle by cycle current limit. Thermal shutdown provides additional protection. The loop pensation ponents and the boost diodes are integrated on-chip. Switching frequency is set by a single external resistor. External synchronization is also possible. The high maximum switching frequency allows the use of small inductors and ceramic capacitors for low ripple. Constant frequency operation above the AM band avoids interference with radio reception, making the LT3509 well suited for automotive applications. Each regulator has an independent shutdown and soft-start control pin. When both converters are powered down, the mon circuitry enters a low current shutdown state. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Features n n n n n n n n n n Two 700m A Switching Regulators with Internal Power Switches Wide 3.6V to 36V Operating Range Over-Voltage Lockout Protects Circuit Through 60V Supply Transients Short Circuit Robust Low Dropout Voltage - 95% Maximum Duty Cycle Adjustable 300k Hz to 2.2MHz Switching Frequency Synchronizable Over the Full Range Uses Small Inductors and Ceramic Capacitors Integrated Boost Diodes Internal pensation Thermally Enhanced 14 Lead (4 mm × 3 mm) DFN and 16 Lead MSOP Packages APPLICATIONS n n n n n Automotive Electronics Industrial Controls Wall Transformer Regulation Networking Devices CPU, DSP, or FPGA Power TYPICAL APPLICATION 3.3V and 5V Dual Output Step-Down Converter 6.5V TO 36V (Transient to 60V) 90 2.2μF VIN BOOST1 3.3V 700m A...