LX8941

Microsemi

Integrated Products Division

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

Page 3

Copyright

© 2001

Rev. 0.7a, 2005-11-10

Adjustable Low Dropout Regulator

TM

®

ELECTRICAL CHA RACTERISTICS

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

°C to 125°C for the LX8941CP;

junction and case temperatures equal to the ambient temperature. Note 3: The output voltage range is 4 to 25V and is determined by the

two external resistor, R1 and R2. See Product Highlight.

LX8941

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

ADJ Pin Voltage (Note 3)

1.225

1.25

1.275

V

Line Regulation

1

50

mV

Load Regulation

10

50

mV

150

300

mV

275

500

mV

Dropout Voltage

∆V

400

800

mV

3

15

mA

30

50

mA

Quiescent Current

115

180

mA

Adjust Pin Current

2

20

µA

Current Limit

1

1.2

A

Output Noise Voltage (Note 4)

10Hz – 100kHz, IO = 5mA

150

Long Term Stability (Note 4)

20

mV /

1000hr

Ripple Rejection (Note 4)

66

dB

Enable Logic Section

On Threshold Voltage

2

V

On Threshold Current

0.1

50

µA

Off Threshold Voltage

0.8

V

Off Threshold Current

-10

-0.3

µA

Note 4: These parameters although guaranteed, are not tested in production.

SIMPLIFIED BLOCK DIAGRAM

+

-

Thermal

Shutdown

ON / OFF

Circuit

C1*

0.1µF

C2

10µF

ON

OFF

INPUT

VOLTAGE

OUTPUT

VOLTAGE

V

IN

ON /

OFF

V

O

ADJ

GND

LX8941

Figure 1 –

Simplified Block Diagram