Analog Devices LTC7891 | Demoboard DC2995A

Description

Demonstration circuit 2995A is a buck regulator featuring the LTC7891. The DC2995A operates from a 36V to 72V input voltage range and generates a 12V, 20A output. The LTC7891 has a precision voltage reference which can generate an output voltage with 2% tolerance over the full operating conditions. The 500kHz switching frequency operation results in a small and efficient circuit. The converter achieves over 96% efficiency with 20A load.The demonstration circuit can be easily modified to regulate output voltages from 0.8V to 60V.The DC2995A provides a high performance cost-effective solution for generating a 12V output. The LTC7891 data sheet gives a complete description of this part, its operation and application information and must be read in conjunction with this demo manual.

Features

• GaN drive technology fully optimized for GaN FETs
• Wide VIN range: 4 V to 100 V
• Wide output voltage range: 0.8 V ≤ VOUT ≤ 60 V
• No catch, clamp, or bootstrap diodes needed
• Internal smart bootstrap switches prevent overcharging of high-side driver supplies
• Internally optimized, smart near zero dead times or resistor adjustable dead times
• Split output gate drivers for adjustable turn on and turn off driver strengths
• Accurate adjustable driver voltage and UVLO
• Low operating IQ: 5 μA (48 VIN to 5 VOUT)
• Programmable frequency (100 kHz to 3 MHz)
• Phase lockable frequency (100 kHz to 3 MHz)
• Spread spectrum frequency modulation
• 28-lead (4 mm × 5 mm) side wettable QFN package

Typical applications

• medical systems
• Industrial power systems
• Telecommunications power systems
• Military avionics and medical systems

More information

• Datasheet
• IC product information