NEX40400BDAZ

NEX40400BDAZ is a high-efficiency step-down converter with low operating quiescent current. The wide 4.5V to 40V input range is suitable for a variety of power step-down applications in industrial and automotive environments. 0.3µA ultralow shutdown supply current allows use in battery-powered applications. The high power conversion efficiency across a wide load range is achieved by folding down the switching frequency at light load conditions, reducing the switching losses. The frequency foldback helps to prevent inductor current runaway during start-up and to allow operation in both high conversion ratio and low drop-out cases. The thermal shutdown provides reliable and robust operation. Target applications include industrial distributed power systems, grid infrastructure: smart E-meter, battery-powered home appliances, and white goods.

• 1% output voltage accuracy
• Spread spectrum for better EMI, start-up with pre-biased output
• Precision enable, internal compensation, short circuit protection with hiccup mode
• 600mA continuous output current
• FPWM operation mode
• 2.1MHz switching frequency
• High side MOSFET on-resistance is 440mohm typ at VVIN = 12V, VBOOT - VSW = 5V,I = 200mA
• Shutdown current is 0.3µA typ at Tj = 25°C, VVIN = 12V, EN = GND
• 6-lead plastic, surface-mounted package (TSOT23-6)
• Temperature range from -40°C to +150°C