Triple Output Synchronous 3-Phase DC/DC Controller with Up/Down Tracking

The LTC3773 is a high performance, 3-phase, triple output synchronous step-down switching regulator controller with output voltage power up/down tracking capability. The controller allows for sequential, coincident or ratiometric tracking.

This 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 700kHz per phase minimizing the RMS input current. Light load efficiency can be maximized by using selectable Burst Mode operation. The 0.6V precision reference supports output voltages from 0.6V to 5V.

Fault protection features include output overvoltage, input undervoltage lockout plus current foldback under short-circuit or overload conditions.

Applications

* Servers, Telecom, Industrial Power Supplies

* General Purpose Multiple Rail DC/DC

* FPGA and DSP Requirements

* Current Mode Controller with On-board MOSFET Drivers

* Programmable Power Up/Down Tracking

* Wide VIN Range: 3.3V to 36V (VCC = 5V)

* ±1% 0.6V VFB Accuracy Over Temperature

* Power Good Output Voltage Monitor

* Phase-Lockable or Adjustable Frequency: 160kHz to 700kHz

* OPTI-LOOP® Compensation Minimizes COUT

* Current Foldback and Overvoltage Protection

* Selectable Continuous, Discontinuous or Burst Mode® Operation at Light Load

* Programmable Phase Operation

* Available in 5mm × 7mm QFN and 36-Lead

* SSOP Packages