Datasheet Analog Devices LT1738 — Datenblatt

LT1738
Slew Rate Controlled
Ultralow Noise DC/DC Controller U DESCRIPTIO FEATURES
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■ The LT ®1738 is a switching regulator controller designed
to lower conducted and radiated electromagnetic interference (EMI). Ultralow noise and EMI are achieved by
controlling the voltage and current slew rates of an external N-channel MOSFET switch. Current and voltage slew
rates can be independently set to optimize harmonic
content of the switching waveforms vs efficiency. The
LT1738 can reduce high frequency harmonic power by as
much as 40dB with only minor losses in efficiency.
The LT1738 utilizes a current mode architecture optimized for single switch topologies such as boost, flyback
and Cuk. The IC includes gate drive and all necessary
oscillator, control and protection circuitry. Unique error
amp circuitry can regulate both positive and negative
voltages. The internal oscillator may be synchronized to
an external clock for more accurate placement of switching harmonics. Greatly Reduced Conducted and Radiated EMI …