L6983I - STMicroelectronics

L6983I 10W synchronous iso-buck converter

The L6983I is a device specifically designed for isolated buck topology. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is derived by using a given transformer ratio. No optocoupler is required. The primary sink capability up to -4.5 A (even during soft-start) allows a proper energy transfer to the secondary side.

Features

• Designed for iso-buck topology
• 3.5 V to 38 V operating input voltage
• Primary output voltage regulation / no optocoupler required
• 4.5 A source / sink peak primary current capability
• Peak current mode architecture in forced PWM operation
• 390 ns blanking time
• 200 kHz to 1 MHz programmable switching frequency. Stable with low ESR capacitor: min 2 µF
• Internal compensation network
• 2 μA shutdown current
• Internal soft-start
• Enable
• Overvoltage protection
• Output voltage sequencing
• Thermal protection
• Optional spread spectrum for improved EMC
• Power Good
• Synchronization to.