ZXLD1356/ ZXLD1356Q

Document number: DS33470 Rev. 4 - 2

7 of 29

www.diodes.com

October 2012

© Diodes Incorporated

ZXLD1356/ ZXLD1356Q

A Product Line of

Diodes Incorporated

Adjusting Output Current

The device contains a low pass filter between the ADJ pin and the threshold comparator and an internal current limiting resistor (50k

Ω nom)

switching threshold and adjust the output current.

Details of the different modes of adjusting output current are given in the applications section.

Output Shutdown

The output of the low pass filter drives the shutdown circuit. When the input voltage to this circuit falls below the threshold

(0.2V nom.), the

internal regulator and the output switch are turned off. The voltage reference remains powered during shutdown to provide the bias current for

the shutdown circuit. Quiescent supply current during shutdown is nominally 60µA and switch leakage is below 5µA.