Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8717
Edited by the Electronicstalk Editorial Team on 25 February 2005
Switch-mode control uses synchronous
rectification
New from Maxim Integrated Products, the MAX8717 is a dual step-down interleaved fixed-frequency switch-mode power-supply controller.
New from Maxim Integrated Products, the MAX8717 is a dual step-down interleaved fixed-frequency switch-mode power-supply controller Featuring synchronous rectification, the MAX8717 is intended for main (5/3.3V) and I/O power generation in battery-powered systems and notebook computers
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The MAX8717's fixed-frequency operation with optimal interleaving minimises input ripple current from the lowest input voltages up to 26V, and reduces input capacitance requirements.
Accurate output current limit is achieved using a sense resistor.
Alternatively, power dissipation can be reduced using lossless inductor current sensing.
Independent on/off controls and power good signals allow flexible power sequencing.
Soft-start reduces inrush current, and soft-stop gradually ramps the output voltage down, thereby preventing negative voltage dips.
The MAX8717 is available in a 28-pin TQFN package, and is screened for the extended temperature range (-40 to +85C).
Prices start at $3.85 (1000-up, FOB USA).
A preassembled MAX8717 evaluation kit is available with recommended external components to reduce design time.
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