MAX1566
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MAX1566

Six-Channel, High-Efficiency, Digital Camera Power Supplies

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Six-Channel, High-Efficiency, Digital Camera Power Supplies Improve Performance, Component Count, and Size Compared to Conventional Multichannel Controllers in 2-Cell AA, 1-Cell Li+, and Dual-Battery Designs

Part Details
Features
  • 95% Efficient Step-Up DC-to-DC Converter
  • 0.7V Minimum Input Voltage
  • Main DC-to-DC Configurable as Either Step-Up or Step-Down
  • Combine Step-Up and Step-Down for 90% Efficient Boost-Buck
  • 95% Efficient Step-Down for DSP Core
  • Regulate LED Current for Four, Six, or More LEDs
  • Open LED Overvoltage Protection
  • Transformerless Inverting Controller (MAX1567)
  • Three Extra PWM Controllers (Two on the MAX1567)
  • Up to 1MHz Operating Frequency
  • 1µA Shutdown Mode
  • Soft-Start and Overload Protection
  • Compact 40-Pin 6mm x 6mm Thin QFN Package
Additional Details
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The MAX1566/MAX1567 provide a complete powersupply solution for digital cameras. They improve performance, component count, and size compared to conventional multichannel controllers in 2-cell AA, 1-cell lithium-ion (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 MAX1566/MAX1567 include six high-efficiency DC-to-DC conversion channels:

  • Step-up DC-to-DC converter with on-chip power FETs
  • Main DC-to-DC converter with on-chip FETs, configurable to step either up or down
  • Step-down core DC-to-DC converter with on-chip FETs
  • DC-to-DC controller for white LEDs or other output
  • Extra DC-to-DC controller (typically for LCD); two extra controllers on the MAX1566
  • Transformerless inverting DC-to-DC controller (typically for negative CCD bias) on the MAX1567
All DC-to-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 MAX1566/MAX1567 are available in space-saving 40-pin thin QFN packages. An evaluation kit is available to expedite designs.

Applications

  • Digital Cameras
  • PDAs

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

MAX1567EVKIT

MAX1567 Evaluation Kit

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MAX1567EVKIT

MAX1567 Evaluation Kit

MAX1567 Evaluation Kit

Features and Benefits

  • Up to 95% Efficient
  • 2.8V to 4.2V Input-Voltage Range
  • Main Step-Down Output, 3.3V
  • Step-Down Output, 1.8V
  • 5V General-Purpose Output
  • CCD and LCD Bias Outputs (+15V/-7.5V)
  • Current-Regulated Output with Overvoltage Protection for White LED Backlighting
  • 1µA Shutdown Mode
  • Fully Assembled and Tested

Product Detail

The MAX1567 evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) that accepts 2.8V to 4.2V input voltages and provides all the output voltages required for a typical digital still camera. The outputs consist of the main step-down output (3.3V), a step-down output (1.8V), a general-purpose 5V output, outputs for driving white LED backlighting, and outputs for charge-coupled device (CCD) and LCD bias. The EV kit comes with the MAX1567 installed, but can also be used to evaluate the MAX1566. For applications with a lower battery voltage, such as 2-AA battery applications, another version of the EV kit is available with the main output configured as a step-up converter (MAX1567SUMEVKIT).

Applications

  • Digital Cameras
  • PDAs

MAX1567SUMEVKIT

Step-Up Main Evaluation Kit for the MAX1566, MAX1567

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MAX1567SUMEVKIT

Step-Up Main Evaluation Kit for the MAX1566, MAX1567

Step-Up Main Evaluation Kit for the MAX1566, MAX1567

Features and Benefits

  • Up to 95% Efficient
  • 1.5V to 3.2V Input Voltage Range
  • Main Step-Up Output, 3.3V
  • Step-Down Output, 1.8V
  • 5V General-Purpose Output
  • CCD and LCD Bias Outputs (+15V/-7.5V)
  • Current-Regulated Output with Overvoltage Protection for White LED Backlighting
  • 1µA Shutdown Mode
  • Fully Assembled and Tested

Product Detail

The MAX1567 step-up main evaluation kit (EV kit) is a fully assembled and tested circuit that accepts input voltages of 1.5V to 3.2V and provides all the output voltages required for a typical digital still camera. The outputs consist of the main step-up output (3.3V), a stepdown output (1.8V), a general-purpose 5V output, outputs for driving white LED backlighting, and outputs for charge-coupled device (CCD) and LCD bias. The EV kit comes with the MAX1567 installed, but can also be used to evaluate the MAX1566. For applications with a higher battery voltage, such as Li+ battery applications, another version of the EV kit is available with the main output configured as a step-down converter (MAX1567EVKIT).

Applications

  • Digital Cameras
  • PDAs

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