Product category:
Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8723
Edited by the Electronicstalk Editorial
Team on 09 August 2006
Step-down regulator is fixed on 3.3V
A high-efficiency, switch-mode, step-down regulator comes with a 14V internal power switch.
Maxim Integrated Products has released the MAX8723, 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 (dual mode) from a 6 to 13.2V DC source
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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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, which minimises the size of external components.
The MAX8723 has a built-in soft-start function that limits inrush current during startup.
This avoids transients that can trigger the front-end protection circuit and lock up the system.
The device also features three other important shutdown functions: current-limit, thermal-shutdown, and timer-delayed output-fault.
These functions protect the power supply against fault conditions.
The MAX8723 also includes a linear regulator (VL) that provides a fixed 5V output (25mA) to support small external loads.
The reference output is highly precise (2V +/-1%), and can also supply small external load currents.
The MAX8723 is available in a 16-pin, 4 x 4mm TQFN package and operates over the -40 to +85C industrial temperature range.
Prices start at $3.65 (1000-up, FOB USA).
A preassembled MAX8723 EV kit is available (with recommended external components) to reduce design time.
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