LT1683EG#PBF

LT1683 is a switching regulator controller designed to lower conducted and radiated electromagnetic interference. 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. It can reduce high frequency harmonic power by as much as 40dB with only minor losses in efficiency. It utilizes a dual output (push-pull) current mode architecture optimized for low noise topologies. The IC includes gate drivers and all necessary oscillator, control and protection circuitry. Unique error amp circuitry can regulate both positive and negative voltages. It is used in application like power supplies for noise sensitive communication equipment, EMI compliant offline power supplies, precision instrumentation systems, isolated supplies for industrial automation, medical instruments, data acquisition systems etc.

• Low switching harmonic content
• Greatly reduced need for external filters
• Dual N-channel MOSFET drivers
• Easily synchronized to external clock
• Regulates positive and negative voltages
• Easier layout than with conventional switchers
• Max switch frequency is 250KHz typical
• Supply current is 25mA typical at (RVSL = RCSL = 17k, VIN = 12)
• Operating junction temperature is -40°C to 125°C
• Package style is 20-lead plastic SSOP

Notes

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