AP1624

PWM/PFM Dual Mode Step-up DC/DC Controller AP1624 „ Features - Input Voltage Range: 0.9~6V - PWM/PFM Switching Control - High Efficiency: 90% - Oscillator Frequency: 300kHz（±15%） - Stand-by Current: ISTB=3µA.（Typ.） - Pb-Free Package: SOT23-5 „ Applications - Electronic Information Organizers - Palmtops - Cellular and portable phones - Portable Audio Systems - Various Multi-function Power Supplies „ General Descriptions The AP1624 is multi-functional step-up DC/DC controllers. Large output current is possible using an externally connected N channel MOSFET, coil, and diode. Output voltage （VOUT）is programmable with 1.23V of standard voltage supply internal, and using externally connected components, output voltage （FB） can be set up at will. With a 300KHz switching frequency, the size of the external components can be reduced. Control switches from PFM to PWM during light loads with the AP1624（PFM/PWM switchable）and the series is highly efficient from light loads to large output currents. During stand-by time （CE pin “Low”）, current consumption is reduced to 3µA. „ Pin Assignment „ Pin Descriptions (TOP VIEW) EXT GND 54 123 FB VCC CE SOT23-5 Pin Pin No. Name Function 1 FB Feedback pin 2 VCC IC Power Supply pin Chip Enable: 3 CE H: Enable L: Disable 4 GND GND pin 5 EXT External N-MOSFET Connection This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a res...