LTC3569EFE#PBF

LTC®3569 contains three monolithic, synchronous step-down DC/DC converter. Intended for medium power applications, it operates over a 2.5V to 5.5V input voltage range. The operating frequency is adjustable from 1MHz to 3MHz, allowing the use of tiny, low cost capacitors and inductors. The three output voltages are independently programmable by toggling the EN pins up to 15 times, lowering the 800mV FB references by 25mV per cycle. The first buck regulator sources load currents up to 1200mA. The other two buck regulators each provide 600mA. The two 600mA buck regulator can also be configured to operate as secondary power stages, running in parallel with another internal buck regulator to supply higher load currents. Typical applications are portable applications with multiple supply rails, general purpose step-down DC/DC, dynamic voltage scaling applications.

• Single pin programmable VFB servo voltages from 800mV down to 425mV (in 25mV steps)
• Pulse-skipping or Burst Mode® operation, all regulators internally compensated
• PGOOD output flag, zero shutdown current
• Overtemperature and short-circuit protection
• Quiescent current in shutdown mode is 1µA (EN1, EN2, EN3=0V)
• Maximum duty cycle is 100% (FBx=0V)
• Fixed oscillator frequency range from 1.9 to 2.8MHz (VRT=SVIN, TA=25°C. VIN=3.6V)
• 16-lead plastic TSSOP package
• Temperature rating range from -40°C to 125°C

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