GENERAL DESCRIPTION
The ADPL54203 operates from an input voltage range
of 3.2V to 40V and delivers up to 17W of isolated
output power. It is a monolithic micropower isolated
flyback converter. By sampling the isolated output
voltage directly from the primary-side flyback
waveform, the part requires no third winding or optoisolator
for regulation. The output voltage is
programmed with two external resistors and a third
optional temperature compensation resistor.
Boundary mode operation provides a small magnetic
solution with excellent load regulation. Low ripple
Burst Mode operation maintains high efficiency at
light load while minimizing the output voltage ripple.
A 3.4A, 60V DMOS power switch is integrated along
with all the high voltage circuitry and control logic
into a thermally enhanced 8-lead SO package. The
high level of integration and the use of boundary and
low ripple burst modes result in a simple to use, low
component count, and high efficiency application
solution for isolated power delivery.

FEATURES
 3.4A, 60V Internal DMOS Power Switch
 3.2V to 40V Input Voltage Range
 No Transformer Third Winding or Opto-Isolator
Required for Output Voltage Regulation
 Quasi-Resonant Boundary Mode Operation at
Heavy Load
 Low Ripple Burst Mode® Operation at Light
Load
 Low Quiescent Current
 115μA in Sleep Mode
 390μA in Active Mode
 Minimum Load < 0.5% (Typ) of Full Output
 Temperature Compensation for Output Diode
 Internal Compensation and Soft-Start
 Output Short-Circuit Protection
 Accurate EN/UVLO Threshold and Hysteresis
 Thermally Enhanced 8-Lead SO Package

APPLICATIONS
 Isolated Auxiliary/Housekeeping Power Supplies
 Isolated Industrial, Medical Power Supplies