Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8667 and MAX866
Edited by the Electronicstalk Editorial Team on 01 May 2007
Power-management ICs put four in one
Four-channel power-management ICs shrink total solution size by integrating two step-down DC/DC convertors and two low-input LDOs, as well as all feedback networks.
New from Maxim Integrated Products, the MAX8667 and MAX8668 are billed as the industry's first four-channel power-management ICs in tiny 9mm2 TQFN packages These ICs minimise total solution size by integrating two step-down DC/DC convertors and two low-input, low-dropout regulators (LDOs), as well as all feedback networks
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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To further save space and cost, they employ a 1.5MHz switching frequency to enable the use of tiny external components, such as 0805 2.2uH inductors.
The MAX8667 and MAX8668 are ideal for cellphones, PDAs, and other space-constrained, handheld applications.
In addition to saving space, the MAX8667 and MAX8668 extend battery life by integrating a synchronous rectifier in each DC/DC convertor in order to achieve up to 93% efficiency, while typically drawing only 100uA quiescent current with all regulators enabled.
One of the DC/DC convertors delivers up to 1.2A output current, while the other delivers up to 600mA.
The low-input LDOs operate down to 1.7V input, thus saving 80% of total power loss in the system as compared with conventional linear-regulator solutions.
The output voltages of the DC/DC convertors are adjustable from 0.6 to 3.3V (MAX8668) or factory preset (MAX8667).
The output voltages of the low-noise LDOs are all factory preset to eliminate the need for an external feedback network.
Packaged in 3 x 3mm TQFNs, these ICs are fully specified for the extended temperature range (-40 to +85C).
Prices start at $2.95 (2500-up, FOB USA).
An evaluation kit is available to speed designs.
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