TEA1207T

INTEGRATED CIRCUITS DATA SHEET TEA1207T High efficiency DC/DC converter Preliminary specification Supersedes data of 1999 Jan 14 File under Integrated Circuits, IC03 1999 Oct 21 Philips Semiconductors Preliminary specification High efficiency DC/DC converter FEATURES Fully integrated DC/DC converter circuit Up-or-down conversion Start-up from 1.85 V input voltage Adjustable output voltage High efficiency over large load range Power handling capability up to 0.85 A continuous average current 275 kHz switching frequency Low quiescent power consumption Synchronizing with external clock True current limit for Li-ion battery compatibility Up to 100% duty cycle in down mode Undervoltage lockout Shut-down function 8-pin SO package. APPLICATIONS Cellular and cordless phones, Personal Digital Assistants (PDAs) and others ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TEA1207T SO8 DESCRIPTION plastic small outline package; 8 leads; body width 3.9 mm GENERAL DESCRIPTION TEA1207T Supply voltage source for low-voltage chip sets Portable computers Battery backup supplies Cameras. The TEA1207T is a fully integrated DC/DC converter. Efficient, compact and dynamic power conversion is achieved using a novel digitally controlled concept like Pulse Width Modulation (PWM) or Pulse Frequency Modulation (PFM), integrated low RDSon CMOS power switches with low parasitic capacitances, and fully synchronous rectification. The device operates at 275 kHz switchin...