Analog Devices Inc. LTC3311 Demonstration Boards

Analog Devices Inc. LTC3311 Demonstration Boards are demonstration and development platforms for the LTC3311 Synchronous Step-Down Silent Switcher® devices. The LTC3311 Silent Switchers are very small, low-noise, monolithic step-down DC-DC converters capable of providing up to 12.5A of output current from a 2.25V to 5.5V input supply. These devices employ Silent Switcher architecture to achieve low EMI and high efficiency at switching frequencies as high as 5MHz.

The Analog Devices Inc. LTC3311 Demonstration Boards are available in five variants:

The DC3018A Demonstration Board features the 12.5A LTC3311S operating as a 2MHz 3.3V to 1.2V 12.5A buck regulator
The DC3059A Demonstration Board features the fixed 0.85V, 12.5A LTC3311-0.85 operating as a 2MHz, 3V to 3.6V input, 0.85V/12.5A output buck regulator
The DC3113A Demonstration Board features the fixed 1V, 12.5A LTC3311-1 operating as a 2MHz, 3V to 3.6V input, 1V, 12.5A output buck regulator
The DC3127A Demonstration Board features the fixed 0.875V, 12.5A LTC3311-0.875 operating as a 2MHz, 3V to 3.6V input, 0.875V/12.5A output buck regulator
The DC3217A Demonstration Board features the fixed 0.75V, 12.5A LTC3311-0.75 operating as a 2MHz, 3V to 3.6V input, 0.75V at 12.5A output buck regulator

Each Demonstration Board is set up to run in forced continuous mode with a 2MHz switching frequency but can be configured to run at different switching frequencies or in pulse skip mode. The target device’s oscillator can also synchronize with an external clock using the MODE/SYNC turret with the default setup.

The Analog Devices Inc. LTC3311 Demonstration Boards feature an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the VIN EMI terminal.

Features

DC3018A
- LTC3311S in an LQFN-18 package
- 2.25V to 5.5V input voltage range (V_IN/V_IN EMI)
- 1.176V to 1.224V output voltage range (V_OUT)
- 12.5A output current (I_OUT)
- 1.8MHz to 2.2MHz switching frequency (f_SW)
- 35ns typical on-time
DC3059A
- LTC3311-0.85 in an LQFN-18 package
- 3.0V to 3.6V input voltage range (V_IN/V_IN EMI)
- 0.827V to 0.871V output voltage range (V_OUT)
- 12.5A output current (I_OUT)
- 1.8MHz to 2.2MHz switching frequency (f_SW)
- 90% efficiency (EFF)
DC3113A
- LTC3311-1 in an LQFN-18 package
- 3.0V to 3.6V input voltage range (V_IN/V_IN EMI)
- 0.990V to 1.010V output voltage range (V_{OUT_TYP})
- 1.005V to 1.027V output voltage with no load (V_{OUT_NO_LOAD})
- 0.980V to 1.001V output voltage with a full load (V_{OUT_FULL_LOAD})
- 2mV/A active voltage positioning (VAVP)
- 12.5A output current (I_OUT)
- 1.8MHz to 2.2MHz switching frequency (f_SW)
- 90% efficiency (EFF)

DC3127A
- LTC3311-0.875 in an LQFN-18 package
- 3.0V to 3.6V input voltage range (V_IN/V_IN EMI)
- 0.850V to 0.897V output voltage range (V_OUT)
- 12.5A output current (I_OUT)
- 1.8MHz to 2.2MHz switching frequency (f_SW)
- 90% efficiency (EFF)
DC3217A
- LTC3311-0.75 in an LQFN-18 package
- 3.0V to 3.6V input voltage range (V_IN/V_IN EMI)
- 742.5mV to 757.5mV output voltage range (V_OUT)
- 755.2mV to 770.4mV output voltage with no load (V_{OUT_NO_LOAD})
- 735.8mV to 750.3mV output voltage with a full load (V_{OUT_FULL_LOAD})
- 1.6mV/A active voltage positioning (VAVP)
- 12.5A output current (I_OUT)
- 1.8MHz to 2.2MHz switching frequency (f_SW)
- 90% efficiency (EFF)