LTC3310S/LTC3310S-1/LTC3310/LTC3310-1

Demonstration Circuit DC2629A features the LTC3310S 10A, Low Voltage, Synchronous Step-Down Silent Switcher^® 2 operating as a 2MHz 3.3V to 1.2V 10A buck regulator. The LTC3310S supports output voltages from 0.5V to V_IN with operating frequencies from 500kHz up to 5MHz. The LTC3310S is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. The integrated bypass capacitors optimize all the fast current loops and make it easier to minimize EMI/EMC emissions by reducing layout sensitivity. Fast minimum on-time of 35ns enables high V_IN to low V_OUT conversion at high frequency.

DC2629A is set up to run in Forced Continuous Mode with a 2MHz switching frequency but can be configured to Pulse Skip Mode and different switching frequencies. RT is connected to V_IN which sets the MODE/SYNC pin as an input and allows the LTC3310S to sync from an external clock. Connecting the MODE/SYNC pin to V_IN sets the mode to Forced Continuous Mode and connecting the MODE/SYNC pin to GND sets the mode to Pulse Skip Mode. The Efficiency vs. Load graph shows the efficiency and the power loss of the circuit with a 3.3V input in forced continuous mode operation.

The DC2629A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the V_IN EMI terminal. The EMI performance of the board is shown in the EMI TEST RESULTS section. The red lines in the EMI performance graphs illustrate the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.

The LTC3310S data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this demo. The LTC3310S is assembled in a 3mm x 3mm LQFN package with exposed pads for low thermal resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout.

Demonstration circuit 3042A features the LTC3310, 10A, Low Voltage Synchronous Step-Down Silent Switcher^® operating as a 2MHz, 2.25V to 5.5V input, 1.2V/10A output buck regulator. The LTC3310 supports output voltages from 0.5V to V_IN with operating frequencies from 500kHz up to 5MHz. The LTC3310 is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. The Silent Switcher technology optimizes the fast-current loops and makes it easier to minimize EMI/EMC emissions. Fast minimum on-time of 35ns enables high V_IN to low V_OUT conversion at high frequency.

DC3042A is set up to run in forced continuous mode with a 2MHz switching frequency but can be configured to pulse-skipping mode and different switching frequencies. connecting RT to V_IN sets the MODE/SYNC pin as an input and allows the LTC3310 to sync from an external clock. Connecting the MODE/SYNC pin to V_IN sets the mode to forced continuous mode and connecting the MODE/SYNC pin to GND sets the mode to pulse-skipping mode. The Efficiency vs Load graph shows the efficiency and power loss of the circuit with a 3.3V input in forced continuous mode operation.

The DC3042A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the V_IN EMI terminal. The EMI performance of the board is shown in the EMI Test Results section. The red lines in the EMI performance graphs illustrate the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.

The LTC3310 data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual. The LTC3310 is assembled in a 3mm × 3mm LQFN package with exposed pads for low thermal resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet Low EMI PCB Layout section.

Demonstration circuit 3021A shows the LTC3310S-1 10A, 1V fixed output, synchronous step-down Silent Switcher^®2 operating as a 2MHz 3.3V to 1.0V 10A buck regulator. The LTC3310S-1 supports operating frequencies from 500kHz up to 5MHz. The LTC3310S-1 is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. The integrated bypass capacitors optimize all the fast-current loops and make it easier to minimize EMI/EMC emissions by reducing layout sensitivity. The LTC3310S-1 has Active Voltage Positioning (AVP) where the output voltage is dependent on load current. At light loads, the output voltage is regulated above the nominal value. At full load, the output voltage is regulated below the nominal value. The DC load regulation is adjusted to improve transient performance and reduce output capacitor requirements.

DC3021A is set up to run in forced continuous mode with a 2MHz switching frequency but can be configured to pulse-skipping mode and different switching frequencies. RT is connected to V_IN which sets the MODE/SYNC pin as an input and allows the LTC3310S-1 to sync from an external clock. Connecting the MODE/SYNC pin to V_IN sets the mode to pulse-skipping mode and connecting the MODE/SYNC pin to GND sets the mode to forced continuous mode.

The DC3021A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the V_IN EMI terminal. The EMI performance of the board is shown in the EMI Test Results section of the demo manual. The red lines in the EMI performance graphs illustrate the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.

The LTC3310S/LTC3310S-1 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with the DC3021A demo manual. The LTC3310S-1 is assembled in a 3mm × 3mm LQFN package with exposed pad for low thermal resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout.

Demonstration Circuit DC2874A shows the LTC3310S 10A, Low Voltage, Synchronous Step-Down Silent Switcher operating as a multiphase 2.0MHz 3.3V to 1.2V buck regulator. The DC2874A has three build options to provide a two phase 20A, three phase 30A, or four phase 40A output solution. The LTC3310S supports adjustable output voltages from 0.5V to V_IN and operating frequencies from 500kHz up to 2.25MHz in multiphase operation.

DC2874A operates in pulse skip mode and allows the slave phases to stop switching first before the master starts skipping pulses for better low current efficiency.

The DC2874A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the VIN EMI terminal. The EMI performance of the board is shown in the EMI TEST RESULTS section. The red lines in the EMI performance graphs illustrate the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.

The Efficiency vs. Load graph shows the efficiency of the circuit with a 3.3V input for the 2-, 3-, 4-phase circuits.

The LTC3310S datasheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual. The LTC3310S is assembled in a 3mm x 3mm LQFN package with exposed pads for low thermal resistance. 

Demonstration Circuit 3043A shows the LTC3310-1 10A, 1V fixed output, synchronous step-down Silent Switcher^® operating as a 2MHz 3.3V to 1.0V 10A buck regulator. The LTC3310-1 supports operating frequencies from 500kHz up to 5MHz. The LTC3310-1 is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. The LTC3310-1 has Active Voltage Positioning (AVP) where the output voltage is dependent on load current. At light loads the output voltage is regulated above the nominal value. At full load the output voltage is regulated below the nominal value. The DC load regulation is adjusted to improve transient performance and reduce output capacitor requirements.

DC3043A is set up to run in forced continuous mode with a 2MHz switching frequency but can be configured to pulse skip mode and different switching frequencies. RT is connected to V_IN which sets the MODE/SYNC pin as an input and allows the LTC3310-1 to sync from an external clock. Connecting the MODE/SYNC pin to V_IN sets the mode to pulse skip mode and connecting the MODE/SYNC pin to GND sets the mode to forced continuous mode.

The DC3043A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the V_IN EMI terminal. The EMI performance of the board is shown in the EMI TEST RESULTS section. The red lines in the EMI performance graphs illustrate the CISPR25 Class 5 peak limits for the conducted and radiated emission tests.

The LTC3310S/LTC3310-1 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with the demo manual. The LTC3310-1 is assembled in a 3mm × 3mm LQFN package with exposed pad for low thermal resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout.