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TEA1208T

High efficiency DC/DC converter

Philips Electronics 

Philips Semiconductors

High efficiency DC/DC converter

Product specification

TEA1208T

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 a wide range of loads

• Power handling capability up to 0.42 A continuous

average current

• 275 kHz switching frequency

• Low quiescent power consumption

• External clock synchronization

• True current limit for Li-ion battery compatibility

• Up to 100% duty cycle in down conversion

• 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 TEA1208T is a fully integrated DC/DC converter.

Efficient, compact and dynamic power conversion is

achieved using special digital control concepts - Pulse

Width Modulation (PWM) and Pulse Frequency

Modulation (PFM), integrated low RDSon CMOS power

switches with low parasitic capacitances, and fully

synchronous rectification.

The device operates at a switching frequency of 275 kHz

requiring only minimum sized external components.

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

TEA1208T

NAME

SO8

PACKAGE

DESCRIPTION

plastic small outline package; 8 leads; body width 3.9 mm

VERSION

SOT96-1

2002 Nov 15

2

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