The MAX8723 is a high-efficiency, switch-mode, stepdown
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
±%) and can also supply small external load currents.
The MAX8723 is available in the 16-pin, 4mm x 4mm,
TQFN package.
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