Product category:
Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX1540 and MAX1541
Edited by the Electronicstalk Editorial
Team on 04 November 2003
PWM controllers integrate saturation
protection
The MAX1540 and MAX1541 are dual pulsewidth-modulation step-down controllers which provide high efficiency, excellent transient response and high DC-output accuracy.
The MAX1540 and MAX1541 are dual pulsewidth-modulation (PWM) step-down controllers which provide high efficiency, excellent transient response and high DC-output accuracy These devices are ideal for stepping down high-voltage batteries to generate low-voltage chipset and RAM power supplies in notebook computers
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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These Quick-PWM controllers are free running, with constant on-time and input feed-forward.
This configuration provides ultrafast transient response, wide input-output differential range, low supply current, and tight load-regulation characteristics.
To ensure reliable overload and inductor saturation protection, the MAX1540 and MAX1541 accurately sense the inductor current across an external current-sense resistor in series with the output.
Alternatively, these controllers can use the synchronous rectifier method or lossless inductor current-sensing method to provide overload protection with lower power dissipation.
The MAX1540 generates chipset, DRAM, CPU I/O, or other low-voltage supplies down to 0.7V.
The MAX1541 powers chipsets and graphics processor cores that require dynamically adjustable output voltages, or generates the active termination bus that tracks the input reference.
The MAX1540 is packaged in a 32-pin thin QFN and the MAX1541 is packaged in a 40-pin thin QFN.
Both devices have optional inductor-saturation protection and overvoltage/undervoltage protection.
These devices are screened for the extended-industrial temperature range (-40 to +85C).
Prices start at $3.55 (1000-up, FOB USA).
An evaluation kit is available to speed design.
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