Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX1960, MAX1961 and MAX1962
Edited by the Electronicstalk Editorial Team on 18 February 2003
Accurate power from step-down
controllers
The MAX1960, MAX1961 and MAX1962 are high-accuracy low-voltage constant-frequency voltage-mode PWM DC/DC step-down controllers for 2.5, 3.3 and 5V input rail applications.
The MAX1960, MAX1961 and MAX1962 are high-accuracy low-voltage constant-frequency voltage-mode PWM DC/DC step-down controllers for 2.5, 3.3 and 5V input rail applications These devices generate output voltages as low as 0.8V with currents up to 20A for ASIC, DSP, microprocessor, and FPGA core and I/O supplies
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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A charge pump provides a 5V gate drive to drive low-cost external mosfets and eliminate the expensive sub-logic-level mosfet.
Output accuracy is +/-0.5% for optimal performance.
The 0.5MHz/1MHz switching frequency optimises size, efficiency, and choice of electrolytic or ceramic capacitor.
For noise-sensitive applications, these devices can be synchronised to an external clock frequency from 450kHz to 1.2MHz.
For dual-output applications, two controllers can be operated at 180 degrees out-of-phase to reduce input capacitor size and cost.
The integrated voltage margining function permits logic controls to shift the output voltage by +/-5% (maximum) extremes, performing production line corner tests.
The MAX1960 features resistor-programmable output voltages and the MAX1961 features four preset output voltages.
The MAX1960/MAX1961 provide lossless short-circuit protection by monitoring the drain-to-source voltage of the external mosfet.
The MAX1962's design provides an accurate current limit by using an external sense resistor.
The MAX1960EEP, MAX1961EEP and MAX1962EEP are available in a space-saving 20-pin QSOP package, specified for the extended-industrial temperature range (-40 to +85C).
Prices start at $1.95 (1000-up, FOB USA).
An evaluation kit and several application circuits are available to speed designs.
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