Internal Switch and Step Down Regulator 16-Pin TQFN EP

The MAX8723 is a high-efficiency, switch-mode, step-down regulator with a 14V internal power switch. With only a few external passive components, this low-cost regulator can generate a fixed 3.3V or adjustable DC output voltage of 2.0V to 3.6V (dual mode) from a 6V to 13.2V DC source. The 13.2V input voltage range makes this part ideal for LCD displays, point-of-load regulators, and other 8/12V-powered industrial equipment applications. The MAX8723 can deliver up to 2A. It features an internal power MOSFET, a built-in bootstrap diode for its MOSFET driver, and an interface for an external synchronous rectifier MOSFET drive to replace the Schottky diode and improve efficiency. Its fixed-frequency PWM/skip-mode operation and current-mode control architecture provide fast load-transient response without compensation. The switching frequency is a pin-selectable 500kHz, 1MHz, or 1.5MHz, minimizing the size of external components. The MAX8723 has built-in soft-start, current-limit, thermal-shutdown, and timer-delayed output-fault shutdown functions. The soft-start function limits inrush current during startup, avoiding transients that can trigger the front-end protection circuits and lock up the system. The current limit, thermal-shutdown, and timer-delayed output-fault shutdown functions protect the power supply against fault conditions. The MAX8723 also includes a linear regulator (VL), which provides a fixed 5V output (25mA) to support small external loads. The reference output is high-precision (2V ±1%) and can also supply small external load currents. The MAX8723 is available in the 16-pin, 4mm x 4mm, TQFN package.

• 6V to 13.2V input supply range
• Integrated 14V 2A n-channel MOSFET switch
• Preset 1.5% accurate 3.3V fixed-output voltage or 2.0V to 3.6V adjustable output (Dual Mode)
• Current-mode PWM operation
• Frequency-selectable 500kHz/1MHz/1.5MHz
• Internal 5V linear regulator supports up to 25mA external load
• 2V precision reference (1%)
• Integrated bootstrap diode for high-side MOSFET drive
• External synchronous rectifier driver
• Built-in soft-start
• 200µA standby mode
• Timer-delayed output fault protection
• Thermal shutdown protection
• Small 16-pin 4mm x 4mm thin QFN package