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5-Channel Slim DSC Power Supplies

Highest Efficiency, Smallest, Five-Channel Slim Digital Still Camera Power Supply

Product Details

Key Features

Parametric specs for Multifunction PMICs
VIN (V) (min) 0.7
VIN (V) (max) 5.5
# Step-Down Outputs 2
# Step-Up Outputs 2
# Inverting Outputs 1
VOUT (V) (min) 1.25
VOUT (V) (max) 5.5
Package/Pins TQFN/32
Budgetary
Price (See Notes)
2.9
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Simplified Block Diagram

Technical Docs

Data Sheet 5-Channel Slim DSC Power Supplies Jul 31, 2003

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 0.7
VIN (V) (max) 5.5
# Step-Down Outputs 2
# Step-Up Outputs 2
# Inverting Outputs 1
VOUT (V) (min) 1.25
VOUT (V) (max) 5.5
Package/Pins TQFN/32
Budgetary
Price (See Notes)
2.9

Key Features

  • Step-Up DC-DC Converter, 95% Efficient
  • Step-Down DC-DC Converter
    • Operate from Battery for 95% Efficient Step-Down
    • 90% Efficient Boost-Buck with Step-Up
  • Three Auxiliary PWM DC-DC Controllers
  • No Transformers (MAX1585)
  • Up to 1MHz Operating Frequency
  • 1mA Shutdown Mode
  • Internal Soft-Start Control
  • Overload Protection
  • Compact 32-Pin Thin QFN Package (5mm x 5mm)

Applications/Uses

  • Digital Cameras
  • PDAs

Description

The MAX1584/MAX1585 provide a complete power-supply solution for slim digital cameras. They improve performance and lower 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.

The MAX1584/MAX1585 include five high-efficiency DC-DC 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.

Simplified Block Diagram

MAX1584, MAX1585: Functional Diagram MAX1584, MAX1585: Functional Diagram Zoom icon

Technical Docs

Data Sheet 5-Channel Slim DSC Power Supplies Jul 31, 2003

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .