LT8303IS5#TRMPBF

LINEAR TECHNOLOGY  LT8303IS5#TRMPBF  芯片, 直流/直流转换器, 反激式, 350KHZ, TSOT-23-5 新

The is a 100VIN micropower high voltage isolated flyback converter with 150V/450mA switch in 5 pin TSOT-23 package. By sampling the isolated output voltage directly from primary side flyback waveform, the device requires no third winding or opto isolator for regulation. The output voltage is programmed with a single external resistor. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple burst mode operation maintains high efficiency at light load while minimizing output voltage ripple. A 450mA, 150V DMOS power switch is integrated along with all high voltage circuitry and control logic. The LT8303 operates from an input voltages range of 5.5V to 100V and can deliver up to 5W of isolated output power. The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low component count and high efficiency application solution for isolated power delivery.

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Low quiescent current of 70µA sleep mode and 280µA active mode

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Minimum load of less than 0.5% of full output

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VOUT set with a single external resistor

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No transformer third winding or opto isolator required for regulation

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Accurate EN/UVLO threshold and hysteresis

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Internal compensation and soft start reduce external component count

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Maximum switching frequency of 350KHz and minimum switching frequency of 7KHz

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Minimum switch-on time of 160ns and minimum switch-off time of 350ns

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Maximum switch-off time of 200µs and switch on-resistance of 3.2ohm

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Operating temperature range from -40°C to 125°C