Performance characteristics and application of 36V buck DC / DC converter LT3509H

Each passage of LT3509 can provide up to 700mA output current, efficiencies up to 88%. The wide input voltage range of 3.6V to 36V and 60V transient protection makes the LT3509 idea for adjusting power from various power supplies, including unmodified wall transformers, 24V industrial power supplies and automotive batteries. For automotive applications, the 3.6V minimum input voltage of the LT3509 enables it to operate at less than 4V, and this input voltage is critical to the requirements of the car cold car. Similarly, the device's 36V continuous input capabilities and 60V transient protection can protect against transients in the case of load. The 300kHz to 2.2 MHz switching frequency of the LT3509 is user programmable, maximizing efficiency when using micro and low cost inductors and ceramic capacitors, resulting in low and predictable output ripples. LTC3509HMSE adopts 16 lead heat-resistant MSOP package. Performance Summary: LT3509H with internal power switch double output 700mA switch regulator wide working range: 3.6V to 36V overvoltage lock protection circuit can withstand 60V voltage transient anti-short-circuit resistance, low voltage difference - up to 95% duty cycle Adjustable 300kHz to 2.2MHz Switching Frequency can synchronize throughout the range can use small inductors and ceramic capacitors integrated boost diode internal compensation heat-resistant 16 lead MSOP package 150 degree maximum junction 12: GT, read full text

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