TLD5085EJ_1 Datasheet, PDF (2/16 Pages) Infineon Technologies AG – 1.8A DC/DC Step-Down Converter

1.8A DC/DC Step-Down Converter
TLD5085EJ
1
Overview
• Wide Input Voltage Range from 4.75V to 45V
• Constant Current or Constant Voltage Regulation
• Drives LEDs in Buck Topology
• Very low shutdown current consumption (typ. 0.1µA)
• 370 kHz switching frequency
• PWM Dimming
• Integrated power-switch (output current up to 1.8A)
• Internal Soft-Start function
• ± 2% output current tolerance (± 4% for full load current range)
• Small thermally enhanced exposed heatslug package
• Over Temperature Shutdown
• AEC Qualified
• Green Product (RoHS Compliant)
PG-DSO-8 (e-Pad)
Description
The TLD5085EJ is a smart LED buck converter with an integrated power-switch, capable of driving up to 1.8A load
current with excellent line and load regulation. The main function of this device is to step-down the input voltage
and regulating a constant LED current. The constant current regulation is especially beneficial for LED color
accuracy and longer lifetime. The TLD5085EJ also has a PWM input which can be used for LED dimming. The
switching frequency of 370kHz allows to use small and inexpensive passive components. An Enable function is
implemented to reduce the shut-down current consumption to typ. 0.1µA. This IC is suited for use in the harsh
automotive environments and provides protection functions such as current limitation and overtemperature
shutdown. The integrated soft-start feature avoids a current and voltage overshot at the output during start-up of
the device.
Applications
• Automotive Lighting (Reading Light, Dome Light, Dashboard Backlighting)
• High Power LED Applications
• Constant Current and Voltage Source
Type
TLD5085EJ
Datasheet
Package
PG-DSO-8 (e-Pad)
2
Marking
TLD5085
Rev. 1.1, 2009-12-16