Features and Benefits
- 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
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.
- Servers, Telecom, Industrial Power Supplies
- General Purpose Multiple Rail DC/DC
- FPGA and DSP Requirements
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Demonstration circuit 913 is a high efficiency and high density supply featuring the 3-output, 3-phase synchronous buck regulator LTC3773 in the 5x7 QFN-38 package. The input voltage range of the demo board is designed for 4.5V to 13.5V, though the LTC3773 controller can take up to 36VMAX VIN. The outputs of this board are 2.5V @ 15A, 1.8V @ 15A and 1.2V @ 15A.
Demonstration circuit 908 is a high efficiency and high density supply featuring the 3-output, 3-phase synchronous buck regulator LTC3773 in the SSOP-36 package. The input voltage range of the demo board is designed for 7V to 24V, though the LTC3773 controller can take up to 36VMAX VIN. The outputs of this board are 3.3V @ 15A, 2.5V @ 15A and 1.8V @ 15A.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.