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MAX1584

Part Number	MAX1584
Manufacturer	Maxim
Description	5-Channel Slim DSC Power Supplies
Published	May 6, 2005
Detailed Description	19-2883; Rev 0; 7/03 KIT ATION EVALU E L B A AVAIL 5-Channel Slim DSC Power Supplies General Description Features o St...
Datasheet	MAX1584 PDF File

Overview

19-2883; Rev 0; 7/03 KIT ATION EVALU E L B A AVAIL 5-Channel Slim DSC Power Supplies General Description Features o Step-Up DC-DC Converter, 95% Efficient o Step-Down DC-DC Converter Operate from Battery for 95% Efficient Step-Down 90% Efficient Boost-Buck with Step-Up o Three Auxiliary PWM DC-DC Controllers o No Transformers (MAX1585) o Up to 1MHz Operating Frequency o 1mA Shutdown Mode o Internal Soft-Start Control o Overload Protection o Compact 32-Pin Thin QFN Package (5mm x 5mm) MAX1584/MAX1585 The MAX1584/MAX1585 provide a complete powersupply solution for slim digital cameras.
They improve performance, component count, and size compared to conventional multichannel controllers in 2-cell AA, 1-cell Li+, and dual-battery designs.
On-chip MOSFETs provide up to 95% efficiency for critical power supplies, while additional channels operate with external FETs for optimum design flexibility.
This optimizes overall efficiency and cost, while also reducing board space.
The MAX1584/MAX1585 include 5 high-efficiency DCDC conversion channels: • Step-up DC-DC converter with on-chip FETs • Step-down DC-DC converter with on-chip FETs • Three PWM DC-DC controllers for CCD, LCD, LED, or other functions The step-down DC-DC converter can operate directly from the battery or from the step-up output, providing boost-buck capability with a compound efficiency of up to 90%.
Both devices include three PWM DC-DC controllers: the MAX1584 includes two step-up controllers and one step-down controller, while the MAX1585 includes one step-up controller, one inverting controller, and one step-down controller.
All DC-DC channels operate at one fixed frequency—settable from 100kHz to 1MHz—to optimize size, cost, and efficiency.
Other features include soft-start, power-OK outputs, and overload protection.
The MAX1584/MAX1585 are available in space-saving, 32-pin thin QFN packages.
An evaluation kit is available to expedite designs.
Ordering Information PART TEMP RANGE PINPACKAGE 32 Thin Q...

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