AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER General Description Features The AP1609 is a high efficient step-up DC/DC converter. Large Input Voltage Range: 2.5~6V output current is possible having a built in internal N channel Output Voltage Range: 3.0~17V (2.5%) MOSFET, and using an external coil and diode. PWM/PFM Switching Control Oscillator Frequency: 300KHz (20%) Output voltage is programmable with 1.23V of standard voltage High Efficiency: 91% (Typ.) supply internal, and using externally connected components, Stand-by Current: I 1 = A (Typ.) STB output voltage (FB) can be set up at will. Built-in internal N-Channel MOS Lead Free Package: SOP-8L With a 300KHz switching frequency, the size of the external SOP-8L: Available in Green Molding Compound components can be reduced. Control switches from PFM to PWM (No Br, Sb) during light loads with the AP1609 (PWM/PFM switchable) and Lead Free Finish/ RoHS Compliant (Note 1) the series are highly efficient from light loads to large output currents. During stand-by time (CE pin Low), current consumption is reduced to 1A. Applications Electronic Information Organizers Palmtops Cellular and Portable Phones Portable Audio Systems Various Multi-Function Power Supplies Ordering Information AP 1609 S X - 13 Package Lead Free Packing 13 : Tape & Reel S : SOP-8L L : Lead Free G : Green Package Packaging 13 Tape and Reel Device Code (Note 2) Quantity Part Number Suffix AP1609SL-13 S SOP-8L 2500/Tape & Reel -13 Lead-free AP1609SG-13 S SOP-8L 2500/Tape & Reel -13 Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER Pin Assignments ( Top View ) 1 8 GND CE 2 7 GND Vcc 3 6 LX FB 4 5 PGND LX SOP-8L Pin Descriptions Pin Name Pin Number Description Chip Enable: CE 1 H: Enable L: Disable Vcc 2 IC signal power supply pin FB 3 Feedback pin PGND 4 Power MOSFET GND Switch Pin. Connect external inductor/diode here. Minimize LX 5, 6 trace area at this pin to reduce EMI. GND 7, 8 GND Pin AP1609 Rev. 2 2 of 9 FEBRUARY 2009 www.diodes.com Diodes Incorporated