MAX1567:Six-Channel, High-Efficiency, Digital Camera Power Supplies

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

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.

Key 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
MAX1566, MAX1567: Typical Operating Circuit
MAX1566, MAX1567: Typical Operating Circuit
  • Digital Cameras
  • PDAs
titleDownload file
MAX1566-MAX1567 Data SheetMAX1566-MAX1567.pdf
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesLCD/LED/Flash/CCD FeaturesVIN
Oper. Freq.
Inverting OutputsPackage/PinsBudgetary
minmaxminmaxSee Notes
Low Batt./POK Output
Adj. Frequency
Current Limit
Fixed Freq./PWM
Internal Switch
Soft Start
Sync. Rectifier
CCD Bias
TFT Bias
White LED$2.90 @1k
MAX1567Adj. Frequency
Current Limit
Internal Switch
Soft Start
Sync. Rectifier
CCD Bias
TFT Bias
Design kits & evaluation modules
Quality and Environmental Data
Related Products
  • MAX1585:5-Channel Slim DSC Power Supplies
  • MAX1584:5-Channel Slim DSC Power Supplies
  • MAX1565:Small, High-Efficiency, Five-Channel Digital Still Camera Power Supply
  • MAX1800:Digital Camera Step-Up Power Supply
  • MAX1802:Digital Camera Step-Down Power Supply
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1567ETLNo Longer AvailableMAX1567ETL+TQFN,;40 pin;37.2 mm²-40°C to +85°CNo
MAX1567ETL+ActiveTQFN,;40 pin;37.2 mm²-40°C to +85°CLead Free
MAX1567ETL+TActiveTQFN,;40 pin;37.2 mm²-40°C to +85°CLead Free
MAX1567ETL-TNo Longer AvailableMAX1567ETL+TQFN;40 pin-40°C to +85°CSee data sheet
MAX1566-MAX1567.pdf MAX1567
MAX1567.pdf MAX1567
典型工作电路 MAX1567