LT3990HMSE#PBF

LINEAR TECHNOLOGY  LT3990HMSE#PBF  直流-直流开关降压逐步递减稳压器, 可调, 4.2V-62V输入, 1.21V-25V输出, 350mA输出, MSOP-16

The is an adjustable frequency monolithic buck Switching Regulator accepts a wide input voltage range up to 62V and consumes only 2.5µA of quiescent current. A high efficiency switch is included on the die along with the catch diode, boost diode and the necessary oscillator, control and logic circuitry. Low ripple Burst Mode® operation maintains high efficiency at low output currents while keeping the output ripple below 5mV in a typical application. Current-mode topology is used for fast transient response and good loop stability. A catch diode current limit provides protection against shorted outputs and overvoltage conditions. An accurate programmable undervoltage lockout feature is available, producing a low shutdown current of 0.7µA. A power good flag signals when VOUT reaches 90% of the programmed output voltage.

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Integrated boost and catch diodes

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Accurate programmable undervoltage lockout

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Internal sense limits catch diode current

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Power good flag