LTC3569IUD#PBF

LTC3569 is a three monolithic, synchronous step-down DC/DC converter. Intended for medium power applications. The three output voltages are independently programmable by toggling the EN pins upto 15 times, lowering the 800mV FB references by 25mV per cycle. The first buck regulator sources load currents upto 1200mA. The other two buck regulators each provide 600mA. The two 600mA buck regulators can also be configured to operate as secondary power stages, running in parallel with another internal buck regulator to supply higher load currents. When operating as parallel, secondary output stages, discrete external components are shared and available output currents sum together. It is widely used in application such as portable applications with multiple supply rails, general purpose step-down DC/DC, dynamic voltage scaling applications etc.

• Pulse-skipping or Burst Mode® operation
• Input voltage range 2.5V to 5.5V
• All regulators internally compensated, PGOOD output flag
• Zero shutdown current, overtemperature and short-circuit protection
• Fixed oscillator frequency is 2.25MHz typical
• Quiescent current in shutdown mode is 1µA maximum
• Undervoltage lockout is 2.5V maximum
• Operating junction temperature is -40°C to 125°C
• Package style is 20-lead plastic QFN

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