LX1995

Microsemi

Integrated Products Division

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

Page 3

Miniature LED Driver

Copyright

© 2000

Rev. 1.1, 2005-07-07

TM

®

ELECTRI CAL CHA RACTERI S TI CS

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

A

LX1995-1 and LX1995-2 part versions.

LX1995-x

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Operating Voltage

1.6

5.5

V

Minimum Start-up Voltage

°C

1.6

V

Start-up Voltage Temperature

Coefficient

Guaranteed; not tested

-2

mV/

°C

Not switching

70

100

Quiescent Current

0.2

0.5

µA

FB Threshold Voltage

288

320

352

mV

FB Input Bias Current

-10

10

nA

Shutdown Input Bias Current

-100

100

nA

Shutdown Low Input Voltage

0.6

Shutdown High Input Voltage

1.4

V

Switch Peak Current

L= 47

µH; LX1995-1

250

325

400

mA

Switch Peak Current

L= 47

µH; LX1995-2

400

500

600

mA

Minimum Switch Off-Time

300

ns

Switch Pin Leakage Current

0.23

µA

Note:

1.

Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.

2.

Functionality over the -40

°C to +85°C operating temperature range is assured by design, characterization, and correlation.

SI MPLIFI ED BLOCK DI AGRAM

Control

Logic

Driver

V

FB

SW

GND

IN

SHDN

Reference

Bias

Figure 1 – Simplified Block Diagram