Elektronische Bauelemente

http://www.SeCoSGmbH.com/

Any changing of specification will not be informed individual

01-Jun-2002 Rev. A

Page

2 of 8

tage does not sag below the minimum dropout voltage during the load

V higher than Vout in order for the device to

Description

GND

Typically a large storage capacitor is connected from this pin to ground to insure that the input

1.3V

or open= output enable.

NC

Typical Application (Fixed Output Voltage Version)

Block Diagram

FEEDBACK

Pin Function

Pin Name

PIN#

FUNCTION

1

This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor

must be present at this pin to minimize voltage transients and to supply the switching current

needed by regulator.

Output

2

copper area connected to this pin should be keep to a minimum.

Ground

3

Circuit ground

Feedback

4

Senses the regulated output voltage to complete the feedback loop

ON/OFF

5

Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the

total input supply current to approximately 80 uA. Pulling this pin below a threshold voltage of

approximately 1.3V turns the regulator on, and pulling this pin above 1.3V (up to a maximum of

25V) shuts the regulator down. If this shutdown feature is not needed, ON/OFF pin can be wired to

the ground pin or it can be left open, in either case the regulator will be in the ON condition.

S5ULM2596

Simple Switcher Power Converter

150KHz 3A Step-Down Voltage Regulator

12V

Unregulated

DC Input

680

33

220

1N5824

680

S5ULM2596-5.0

DC Input