LM5574MT

TEXAS INSTRUMENTS  LM5574MT  直流-直流开关降压逐步递减稳压器, 可调, 6V-75V输入, 1.225V-70V输出, 500mA输出, TSSOP-16

The is an easy-to-use SIMPLE SWITCHER® Buck Regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 to 75V, the LM5574 delivers 0.5A of continuous output current with an integrated 750mR N-channel MOSFET. The regulator utilizes an emulated current-mode architecture which provides inherent line regulation, tight load transient response and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50 to 500kHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC"s from the LM2557x family to self-synchronize or to synchronize to an external clock. The LM5574 ensures robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down and remote shut-down.

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Master or slave frequency synchronization

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Adjustable soft-start function

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Emulated current-mode control architecture

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Wide bandwidth error amplifier

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Built-in protection

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1.5% Feedback reference accuracy