High Efficiency 1.5MHz, Step up Regulator

EC9211

Page 2 of 15

3G24N-Rev.P001

Pin Description

Pin Number

Pin Name

Description

1

LX

Switch pin. Connect this pin to inductor/diode here.

2

GDN

GND

3

FB

Feedback Input. The device senses feedback voltage via FB and regulate the voltage at

1.23V. Connecting FB with a resistor‐divider from the output that sets the output voltage.

4

EN

Enable Control Input. Forcing this pin above 1.0V enables the device. Forcing this pin

below 0.4V to shut it down. In shutdown, all functions are disabled to decrease the supply

current below 1μA. Do not left this pin floating.

5

IN

Main Supply Pin. Must be closely decoupled to GND with a 2.2μF or greater ceramic

capacitor.

6

NC

Ordering Information

Part Number

Package

Marking

Marking Information

EC9211NNB3R

SOT23-6

9211f

1.

Starting with underlined 2, a bar is for

production year 2012. The next bar is

mark on top of first 1 is for year 2013.

The next bar is mark on bottom of first

1 is for year 2014.The next bar is

mark on top of second 1 is year for

2015. The naming pattern continues

with consecutive characters for later

years.

2.

f is the week of production. The big

character of A~Z is for the week of

1~26, and small a~z is for the week of

27~52.