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Analog Devices Inc. MAX25431 Automotive H-Bridge Buck-Boost Controller operates with input voltages from 6V to 36V while using only 55μA quiescent current at no load. The wide input voltage range, combined with the ability to maintain constant output voltage during battery transients, makes the MAX25431 ideal for automotive applications.
For light-load applications, a logic input (FSYNC) allows the devices to operate either in skip mode for reduced current consumption, or fixed frequency, forced-PWM mode. The FSYNC eliminates frequency variation and assists in minimizing EMI. The MAX25431 Controller offers a switching frequency that is resistor programmable from 220kHz to 2.2MHz and can be synchronized to an external clock. Analog Devices MAX25431 Automotive Controller features an output voltage of 5V fixed or adjustable from 3V to 25V. Protection features include cycle-by-cycle current limit followed by hiccup during sustained overloads, input under-voltage lockout (UVLO), output overvoltage protection, and thermal shutdown with automatic recovery.
The MAX25431 Automotive H-Bridge Buck-Boost Controller is housed in a small 4mm x 4mm 24-pin TQFN-EP SW package.
