LXXLD70

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 8

www.unisonic.com.tw

QW-R502-674.a

MARKING INFORMATION

PACKAGE

VOLTAGE CODE

MARKING

HSOP-8

AD : ADJ

UTC

Date Code

LXXLD70

G: Halogen Free

L: Lead Free

Voltage Code

Lot Code

PIN CONFIGURATION

GND

FB

EN

1

2

3

4

5

6

7

8

PIN DESCRIPTION

PIN NO.

PIN NAME

DESCRIPTION

1

GND

Ground pin.

2

FB

There’s an external resistor divider connected to this pin which is necessary to give the

feedback voltage to the regulator. The external circuit is combined as the follow:

load transient response),and between FB and ground is R2.The value of R2 and R1 are

recommended between 100Ω~10kΩ.So the output voltage is equals:

R2

R1

)(V)

3

The output voltage pin of the regulator. There should be set an output capacitor to

compensate for closed-loop and also to improve transient responses. It’s necessary to

connect Pin 3 and Pin 4 together by wide tracks.

4

5

This pin is the main supply input.

Monitoring this pin’s voltage can reset Power-On.

6

Power input pin of the control circuitry. Connecting this pin to a +5V (recommended)

supply voltage provides the bias for the control circuitry. The voltage at this pin is

monitored for Power-On Reset purpose.

7

Output pin for Power-OK signal output.

Being an open drain output, through senescing FB voltage, this pin can show the users

the output voltage’s states. That’s this pin will be low under any of these two situations:

8

EN

Input Enable control pin. The output voltage can be shut down when this pin is below

current source, and then the regulator will begin working normally.