Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX1945
Edited by the Electronicstalk Editorial Team on 06 December 2002
Step-down convertor shrinks real estate
Maxim Integrated Products reckons the MAX1945 is the smallest 6A 1%-accurate internal switch step-down DC/DC regulator to generate core and I/O supplies for DSPs, FPGAs, ASICs and microprocessors.
Maxim Integrated Products reckons the MAX1945 is the smallest 6A 1%-accurate internal switch step-down DC/DC regulator to generate core and I/O supplies for DSPs, FPGAs, ASICs and microprocessors The complete circuit fits in 0.76in2 of space
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The MAX1945 integrates power mosfets to reduce the size and complexity of the design.
Digital soft-start, current-limit/short-circuit protections, and thermal-overload protection provide a robust design.
The MAX1945 operates from a 2.6 to 5.5V input and generates output voltages down to 0.8V.
When a 3 to 5.5V bias supply is available, the device can operate from voltages as low as 2.25V.
Its selectable 500kHz or 1MHz switching frequency reduces the size and cost of external components.
The MAX1945 is compatible with both ceramic and electrolytic capacitors.
For noise-sensitive applications, the MAX1945 can be synchronised with an external clock.
The device also provides a 180-degree out-of-phase clock output to synchronise another switching regulator and reduce input capacitors for dual-output applications.
Voltage margining permits logic controls to shift the output voltage extremes in both (by up to +/-5% in the MAX1945R and +/-10% in the MAX1945S) to perform production line corner tests.
The MAX1945REUI and MAX1945SEUI come in thermally enhanced 28-pin TSSOP packages with an exposed metal pad.
They are specified for the extended industrial temperature range (-40 to +85C).
Prices start at $4.20 (1000-up, FOB, USA).
Evaluation kits and several application circuits are available to speed designs.
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