EVAL-LTC7897-AZ

EVAL-LTC7897-AZ is an evaluation circuit that features the LTC®7897, a 140V low IQ synchronous buck controller with programmable 5V to 10V gate drive. Split gate drivers allow for easily adjustable turn-on and turn-off of FETs. User adjustable adaptive and smart dead time control modes are available for optimal gate timing. Additionally, the IC features low IQ, up to 2.5MHz programmable/synchronizable switching frequency, spread spectrum, and a small 28-lead (4mm x 5mm) QFN package. These features allow for a wide variety of applications including industrial, military, medical, and telecommunications systems. The LTC7897 supports output voltages from 0.8V to 135V. The evaluation circuit has been designed with 150V FETs. Various FETs of similar footprint can be substituted to fit a wide array of applications.

• Operates from a 16V to 100V input voltage range and generates a 12V, 20A output
• LTC7897: precision voltage reference providing O/P voltage w/ 2% tolerance over operating conditions
• Switching frequency: 200kHz typ at JP1=disable SS (SSFM Off), 240kHz max JP1=enable SS (SSFM On)
• Typical efficiency of 95% at VIN = 48V, IOUT = 20A, 93% at VIN = 100V, IOUT = 20A
• Provides a high-performance, cost-effective solution for generating a 12V output