MAX1570 White LED Current Regulator With 1x/1.5x High-Efficiency Charge Pump

The MAX1570 fractional Charge Pump drives up to five white LEDs with regulated constant current for uniform intensity. The MAX1570 maintains the highest possible efficiency over the full 1-cell lithium-ion (Li+) battery input voltage range by utilizing a 1x/1.5x fractional Charge Pump and very-low-dropout current Regulators The MAX1570 operates with 1MHz fixed-frequency switching, allowing for tiny external components. The regulation scheme is optimized to ensure low EMI and low input ripple.
An external resistor sets the full-scale LED current, while two digital inputs control on/off and select between three levels of brightness. A pulse-width modulation (PWM) signal CAN also be used to modulate LED brightness.
The MAX1570 is available in 16-pin 4mm x 4mm Thin QFN packaging (0.8mm max height).
By Maxim Integrated Products
MAX1570 's PackagesMAX1570 's pdf datasheet

MAX1570 Pinout, Pinouts
MAX1570 pinout,Pin out
This is one package pinout of MAX1570,If you need more pinouts please download MAX1570's pdf datasheet.

MAX1570 Application circuits
MAX1570 circuits
This is one application circuit of MAX1570,If you need more circuits,please download MAX1570's pdf datasheet.

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