Microsemi

Linfinity Microelectronics Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 2

Copyright

© 2000

Rev. 1.0a, 2005-03-03

LX8221

Dual 150mA CMOS Low Dropout Regulator

TM

®

ABSOLUTE MAXI MUM RATI NGS

Input Voltage (VIN1, VIN2).......................................................................... -0.3V to +7V

Operating Temperature Range .....................................................................-40 to +125 °C

Peak Package Solder Reflow Temp. (40 second max. exposure)................. 260°C (+0, -5)

Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to

Ground. Currents are positive into, negative out of specified terminal.

PACKAGE PIN OUT

1

2

4

3

7

8

10

9

56

VIN1

EN1

GND

ADJ

VO UT2

VO UT1

CB1

NC

EN 2

VIN 2

(Top View)

“NC” = No Internal Connection

RoHS / Pb-free 100% Matte Tin Lead Finish

TH ERM A L DATA

DU

Plastic MSOP 8-Pin

THERMAL RESISTANCE

206

°C/W

THERMAL RESISTANCE

39

°C/W

system. All of the above assume no ambient airflow.

FRONT MARKING

x = Voltage Combination

i.e. A = Adj/Adj

FUNCTIONAL PIN DESCRIPTION

VIN1/VIN2

Unregulated input supply voltage

GND

Ground Pin

EN1/EN2

Enable control input: Logic high = Enable; logic low or open = Shutdown

CB1

Reference bypass input. Adding an additional external capacitor reduces output noise.

VOUT1/VOUT2

Regulated output voltage. Regulator stability is achieved with external capacitor of 1uF

ADJ (1, 2)

Adjust pin. Connect a resistor divider to this pin to establish preferred output voltage.

8221

xIDU

LX