General Description
The TD1509is a series of easy to use fixed and
adjustablestep-down (buck) switch-mode voltage
regulators.These devices are available in fixed output
voltage of5V,3.3V an adjustable output version. Both
versionsare capable of driving a 2A load with excellent
line andload regulation.
Re minimum number of external components,
theseregulators are simple to use and include internal
fren, and a fixed-frequency
oscillator.
The outputvoltage is guaranteed to ±3% tolerance under
specifiedinput voltage and output load conditions. The
oscillatorfrequency is guaranteed to ±15%. External
shutdownis included, featuring typically 80 μA standby
current.Self protection features include a two stage
fre current limit for the output switch and
an overtemperature shutdown for complete protection
underfault conditions.
The TD1509is available in SOP8 and DIP8 packages.
Applications
z SimpleHigh-efficiency step-down regulator
z On-cardswitching regulators
z Positiveto negative converter
z LCDmonitor and LCD TV
z DVDrecorder and PDP TV
z Batterycharger
z Step-downto 3.3V for microprocessors
