Description
The YB1313 charge pump is designed to drive up to 5 white LEDs with regulated constant current in back lit display application. The device can provide up to 25 mA per LED for a total of more than 125 mA. The input voltage ranges from 2.7V to 5.5V and is ideal for applications powered by a single LI-Ion or 3 to 4 NiCd, NiMH or Alkaline batteries.

Features
■ Input Range : 2.7V to 5.5V
■ Drives up to 5 LEDs at 25mA Each
■ 1MHz Internal Oscillator
■ Thermal Protection Shutdown
■ Output Short-circuit Current Limit and Over-voltage Protection
■ Under-Voltage Lockout With Hysteresis
■ Automatic Soft-Start Reduces In-Rush Current
■ Three Charge Pump Mode： 1x/1.5x/2x
■ 3mm x 3mm TQFN package

Applications
■ White LED Backlighting
■ Handheld PCs and PDAs
■ Mobile Phone