1. Products
  2. Power Management
  3. LED Driver IC
  4. Inductorless (Charge Pump) LED Drivers
  5. MAX8822


Overview

Features and Benefits

  • High-Efficiency Charge Pump for Up to Four White LEDs
    • Independent Adaptive Voltage Supply for Each LED
    • 24mA to 0.1mA Dimming Range
    • 1% (typ) Current Accuracy and 0.3% Current Matching
    • Low 65µA (typ) Quiescent Current
  • Dual 200mA Low-Noise, High PSRR LDOs
    • 16 Different Output Voltage Combinations Up to 3.3V
    • High 60dB PSRR at 10kHz
  • Flexible Single-Wire Control for Dimming and LDO Output Voltage
  • Low 0.5µA (typ) Shutdown Mode
  • Soft-Start Limits Inrush Current
  • Thermal Shutdown and Open- and Short-Circuit Protection
  • Tiny 16-Pin, 3mm x 3mm Thin QFN Package (0.8mm max Height) with Exposed Paddle

Product Details

The MAX8822 drives up to four white light-emitting diodes (LEDs) with regulated constant current for display backlighting in cell phones, digital cameras, PDAs, and other handheld devices. By utilizing a proprietary negative 0.5x inverting charge pump and innovative independent low-dropout (LDO) adaptive current regulators, very high efficiency is achieved over the full 1-cell Li+ battery voltage range, even with large LED VF mismatch. The 1MHz fixed-frequency switching allows for tiny external components. The regulation scheme is optimized to ensure low EMI and low input ripple. Two 200mA, low-noise, high power-supply-rejection-ratio (PSRR) LDOs with programmable output voltages are included on-chip to provide power to camera modules or other devices.

The MAX8822 features a single-wire, serial-pulse control-logic interface that programs LED current and the output voltages of the LDOs. The LED dimming range is pseudo-logarithmic from 24mA to 0.1mA in 31 steps. LDO output voltages are programmable in 16 different combinations to meet various camera module requirements.

The MAX8822 includes soft-start, thermal shutdown, open- and short-circuit protection.

Applications

  • Cell Phones and Smartphones
  • White LED Backlighting

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Product Recommendations

MAX8822 Companion Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX8822ETE+ Material Declaration Reliability Data 16-LFCSP-3X3X0.75
MAX8822ETE+T Material Declaration Reliability Data 16-LFCSP-3X3X0.75
Wafer Fabrication Data MAX8822 Reliability Data

Sample & Buy


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