Datasheet Analog Devices LT1683 — Datenblatt

LT1683
Slew Rate Controlled
Ultralow Noise Push-Pull DC/DC Controller
DESCRIPTION FEATURES Greatly Reduced Conducted and Radiated EMI
n Low Switching Harmonic Content
n Independent Control of Output Switch Voltage and
Current Slew Rates
n Greatly Reduced Need for External Filters
n Dual N-Channel MOSFET Drivers
n 20kHz to 250kHz Oscillator Frequency
n Easily Synchronized to External Clock
n Regulates Positive and Negative Voltages
n Easier Layout Than with Conventional Switchers The LT ®1683 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 external N-channel
MOSFET switches. Current and voltage slew rates can
be independently set to optimize harmonic content of
the switching waveforms vs efficiency. The LT1683 can
reduce high frequency harmonic power by as much as
40dB with only minor losses in efficiency.
The LT1683 utilizes a dual output (push-pull) current
mode architecture optimized for low noise topologies. …