Microsemi

Integrated Products Division

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

Page 3

Copyright

© 2004

Rev. 1.1, 2005-02-24

LX8820

3.3V/1.0A Ultra Low Dropout Regulator

TM

®

ELECTRI CAL CHA RACTERI S TI CS

Unless otherwise specified, the following specifications apply over the operating ambient temperature 0

°C

A

duty cycling methods.

LX8820-33

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Fixed Output (3.3V)

Output Voltage

3.234

3.300

3.366

V

Line Regulation

4

9

mV

Load Regulation

2

15

mV

0.45

V

Dropout Voltage

3.0

3.3

3.383

Transient Response;

Note 2

3.63

V

Transient Response;

Note 2

3.0

V

Current Limit

1.0

1.5

A

Minimum Load Current

Note 1

0

0.1

mA

205

300

Quiescent Current

550

650

µA

Ripple Rejection

PSRR

50

75

dB

10Hz < f < 10kHz

0.003

%/V

Thermal Shutdown

140

160

°C

Note 1: Minimum load current is defined as the amount of output current required to maintain regulation.

Note 2: Guaranteed by design.

BLOCK DI AGRAM

V

IN

GND

V

OUT

Bias

+

-

1.25V

V

REF

C1

10µF

C2

10µF

LX8820

Figure 1

– Fixed Output

Note: Application Circuit above using ceramic capacitors