eorex

EP3001

Jul. 2006

www.eorex.com

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Pin Assignment

Adjustable Output Version

1

2

3

5

4

EN

GND

SW

FB

TSOT23-5

1

2

3

5

4

EN

GND

SW

TSOT23-5

Top View

Top View

Fixed Output Version

* Fixed 1.5V Marking A2YW

* Fixed 1.8V Marking A3YW

* Fixed 1.2V Marking A4YW

Ordering Information

Pin Description

Pin

Name

Function

1

EN

Regulator Enable control input. Drive EN above 1.5V to turn on the part.

Drive EN below 0.3V to turn it off. In shutdown, all functions are disabled

drawing <1µA supply current. Do not leave EN floating.

2

GND

Ground

3

SW

Power Switch Output. It is the Switch note connection to Inductor. This pin

connects to the drains of the internal P-Ch and N-Ch MOSFET switches.

4

Supply Input Pin. Must be closely decoupled to GND, Pin 2, with a 2.2µF or

greater ceramic capacitor.

5

FB(EP3001-Adj):

Feedback Input Pin. Connect FB to the center point of the external resistor

divider. The feedback threshold voltage is 0.6V.

Output Voltage Feedback Pin. An internal resistive divider divides the

output voltage down for comparison to the internal reference voltage.