Philips Semiconductors
High efficiency DC/DC converter
Product specification
TEA1207T
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
• Supply voltage source for low-voltage chip sets
• Portable computers
• Battery backup supplies
• Cameras.
GENERAL DESCRIPTION
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 switching frequency
which enables the use of external components with
minimum size. Deadlock is prevented by an on-chip
undervoltage lockout circuit.
Efficient behaviour during short load peaks and
compatibility with Li-ion batteries is guaranteed by an
accurate current limiting function.
ORDERING INFORMATION
TYPE NUMBER
TEA1207T
NAME
SO8
PACKAGE
DESCRIPTION
plastic small outline package; 8 leads; body width 3.9 mm
VERSION
SOT96-1
2000 Nov 27
2