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.
title | Download file |
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MAX1566-MAX1567 Data Sheet | MAX1566-MAX1567.pdf |
Part Number | Primary Topology | Monitor/Control Features | DC-DC/Power Features | LCD/LED/Flash/CCD Features | VIN (V) | VIN (V) | VOUT (V) | VOUT (V) | Max. IOUT (A) | Max. IOUT (A) | Oper. Freq. (kHz) | Inverting Outputs | Package/Pins | Budgetary Price |
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min | max | min | max | See Notes | ||||||||||
MAX1566 | Step-Down Step-Up Step-Up/Down | Low Batt./POK Output Shutdown | Adj. Frequency Current Limit Fixed Freq./PWM Internal Switch Soft Start Sync. Rectifier | CCD Bias TFT Bias White LED | 0.7 | 5.5 | 1.25 | 5.5 | 0.75 | 0.75 | 1000 | - | TQFN/40 | $2.90 @1k |
MAX1567 | Adj. Frequency Current Limit Internal Switch Soft Start Sync. Rectifier | CCD Bias TFT Bias | 1 | TQFN/40 | ||||||||||
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
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MAX1566ETL | No Longer Available | MAX1566ETL+ | TQFN,;40 pin;37.2 mm² | -40°C to +85°C | No |
MAX1566ETL+ | Active | TQFN,;40 pin;37.2 mm² | -40°C to +85°C | Lead Free | |
MAX1566ETL+T | No Longer Available | QFN;40 pin | -40°C to +85°C | See data sheet | |
MAX1566ETL-T | No Longer Available | QFN;40 pin | -40°C to +85°C | See data sheet |