Synchronous Boost Controller Provides 97% Efficiency With I/O Protection

Synchronous Boost Controller Provides 97% Efficiency With I/O Protection
Linear Technology Corp.

The LTC3897 multiphase synchronous boost dc/dc controller with input surge stopper and ideal diode controller drives two N-channel power MOSFET stages out-of-phase to reduce input and output capacitor requirements, enabling the use of smaller inductors versus the single-phase equivalent. The integrated ideal diode controller drives another N-channel MOSFET for reverse input voltage protection and voltage holdup or peak detection. The LTC3897 can be configured to regulate a 24V/10A output from a car battery (12V) up to 97% efficiency. Its 55-µA quiescent current in Burst Mode operation further extends battery life and minimizes power loss at light loads. The LTC3897 itself operates from an input voltage ranging from 4.5V to 65V, with 75V peak. It can regulate an output voltage as high as 60V and the powerful onboard adjustable 5V to 10V gate drivers are capable of slewing large logic-level or standard threshold MOSFET gates quickly. The LTC3897 is available in TSSOP-38 and 5 mm x 7 mm QFN-38 packages. Three temperature grades are available, with operation from -40°C to +125°C for the extended and industrial grades and an automotive range of -40°C to +150°C. Price starts at $5.50 each/1,000. For more information, visit

Linear Technology Corp.
Milpitas, CA.

Contact Info

Company: Linear Technology Corp.
Country: United States (USA)
Phone number: 408-432-1900 x2419

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