Product category:
Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX1973 and MAX1974
Edited by the Electronicstalk Editorial
Team on 20 September 2002
Low noise and small size for step-down
regulators
The MAX1973 and MAX1974 are reckoned to be the smallest 1A step-down regulators for network, telecomms, cellular basestation, fibre modules, wireless modems and xDSL equipment.
The MAX1973 and MAX1974 are reckoned to be the smallest 1A step-down regulators for network, telecomms, cellular basestation, fibre modules, wireless modems and xDSL equipment Occupying only 0.19in2, each device operates at a constant 1.4MHz switching frequency over the load range and minimises noise interference (unlike the competitors' products that skip pulses at light loads)
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The MAX1973/MAX1974 operate from a 2.6 to 5.5V input and generate output voltages as low as 0.75V (MAX1974) with 1% accuracy over load, line, and temperature variations.
1.4MHz current-mode PWM operation reduces the size of external components, provides excellent transient response, and ensures operation outside the ADSL band.
Both devices deliver 1A output with small 4.7uF input and output ceramic capacitors.
The MAX1973's output can be shifted by +/-5% (max) with voltage margining digital inputs to simplify board level production testing.
The MAX1974 features a power-OK indicator that monitors output voltage.
Pricing for the MAX1973EUB and MAX1974EUB starts at $1.65 (1000-up, FOB, USA).
Both devices are available in small 10-pin microMAX packages and are specified for the extended-industrial temperature range (-40 to +85C).
An evaluation kit is available to speed designs.
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