LTC1628CG-SYNC#PBF

LTC1628-SYNC is a high performance dual stepdown switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows phase lockable frequency of up to 300KHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The precision 0.8V reference and power good output indicator are compatible with future microprocessor generations. Current foldback limits MOSFET dissipation during short-circuit conditions when overcurrent latchoff is disabled. Output overvoltage protection circuitry latches on the bottom MOSFET until VOUT returns to normal. It is used in application such as notebook and palmtop computers, PDAs, telecom systems, battery-operated digital devices, DC power distribution systems etc.

• ±1% output voltage accuracy, power good output voltage monitor
• Wide VIN range is 3.5V to 36V, foldback output current limiting
• Latched short-circuit shutdown with defeat option
• Output overvoltage protection, remote output voltage sense
• 5V and 3.3V standby regulators, selectable constant frequency or Burst Mode® operation
• Shutdown current is 20µA typical at (VRUN/SS1, 2 = 0V, VSTBYMD = open)
• Oscillator and phase-locked loop frequency is 220KHz typical at (VPLLFLTR = 1.2V)
• Minimum on-time is 180ns typical
• Operating temperature is 0°C to 85°C
• Package style is 28-lead plastic SSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party