Microsemi

Integrated Products Division

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

Page 3

Copyright

© 2000

Rev. 1.1b, 2005-03-03

LX1741

High Efficiency High Voltage Boost Controller

I N T E GRA T ED

PR ODUC T S

ELECTRI CAL CHA RACTERI S TI CS

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

LX1741

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Operating Voltage

1.6

6.0

V

Minimum Start-up Voltage

1.6

V

Start-up Voltage Temperature

Coefficient

-2

mV/°C

80

100

µA

Quiescent Current

0.2

0.5

µA

FB Threshold Voltage

1.264

1.290

1.316

V

FB Input Bias Current

-200

200

nA

ADJ Input Voltage Range

1

0

100mV

V

ADJ Input Bias Current

0.3

1.0

µA

SRC Input Current

0.8

Shutdown Input Bias Current

SHDN = GND

-50

50

nA

Shutdown High Input Voltage

1.6

V

Shutdown Low Input Voltage

0.4

V

Current Sense Bias Current

3.0

5.0

7.0

µA

Minimum Peak Current

GBNT

2

145

mA

Comparator A Delay

GBNT

2

620

ns

NDRV Sink Current

50

mA

NDRV Source Current

100

mA

Minimum Off-Time

100

500

ns

Notes:

SI MPLIFI ED BLOCK DI AGRAM

Logic

Controller

Reference

Logic

ADJ

FB

Shutdown

Logic

SHDN

CS

Driver

GND

NDRV

IN

SRC

50pF

A

B

1.29V

Reference