Analog Devices Inc. LTC7819 Demonstration Board (DC2897A)
Analog Devices Inc. LTC7819 Demonstration Board (DC2897A) is an evaluation platform for the LTC7819 Synchronous Step-Down Controller. The LTC7819 is a high-performance triple step-down synchronous DC-DC switching regulator controller that drives all N-channel power MOSFET stages. The LTC7819 features a constant frequency current mode architecture allowing a phase-lockable switching frequency of up to 3MHz. The device has a wide operating 4.5V to 40.0V input supply range. The three controller output stages operating out-of-phase minimize power loss and supply noise.
The Analog Devices Inc. LTC7819 Demonstration Board provides outputs of 3.3V at 12A, 8.5V at 10A, and 5.0V at 12A over an input voltage range of 10V to 36V with a switching frequency of 380kHz. Each rail uses a 3mΩ sense resistor to sense the current and provides optional footprints for DCR sensing.
The LTC7819 Demonstration Board includes pin-selectable light load operating modes of forced continuous mode, pulse-skipping, and Burst Mode® operation. Additional features include optional spread spectrum modulation to reduce EMI, a PLLIN pin to synchronize to an external clock, and optional DCR sensing footprints. An EXTVCC pin reduces losses in the controller and optional footprints are provided to parallel two or three channels.
Features
- 10V to36V input voltage range
- 3.3V output voltage #1, VOUT1
- 8.5V output voltage #2, VOUT2
- 5.0V output voltage #3, VOUT3
- 12A maximum output current, IOUT1
- 10A maximum output current, IOUT2
- 12A maximum output current, IOUT3
- 380kHz switching frequency
- Efficiency
- 94.9% @ VIN = 12V, VOUT1 = 3.3V, IOUT1 = 12A
- 97.9% @ VIN = 12V, VOUT2 = 8.5V, IOUT2 = 10A
- 96.4% @ VIN = 12V, VOUT3 = 5.0V, IOUT3 = 12A
Resources
Supported Device
Analog Devices Inc. LTC7819 Synchronous Step-Down Controller
A triple step-down DC-DC switching regulator controller that drives all N-ch power MOSFET stages.
Setup Diagram
