ZXSC440

SEMICO NDUC TORS

ISSUE 1 - JANUARY 2005

2

PARAMETER

LIMIT

UNIT

-0.3 to +10

V

DRIVE

V

READY

V

CHARGE

V

V

Operating temperature

-40 to +85

°C

Storage temperature

-55 to +150

°C

Power dissipation at 25°C

450

mW

ABSOLUTE MAXIMUM RATINGS

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

1.8

8

V

Iq

(1)

Quiescent current

220

A

Shutdown current

4.5

A

Eff

(2)

Efficiency

85

%

Reference tolerance

-3.0

3.0

%

Reference temp co

0.005

%/°C

Discharge pulse width

1.7

s

Operating frequency

200

kHz

INPUT PARAMETERS

Sense voltage

22

28

34

mV

Sense input current

-1

-7

-15

A

Feedback voltage

291

300

309

mV

(2)

Feedback input current

-1.2

-4.5

A

VIH

(3)

Shutdown threshold

1.5

V

CC

V

VIL

Shutdown threshold

0

0.55

V

Line voltage regulation

0.5

%/V

OUTPUT PARAMETERS

Transistor drive current

2

3.4

5

mA

Transistor voltage drive

0

V

V

Mosfet gate drive cpbty

300

pF

Ready flag output high

2.5

V

CC

V

Ready flag output low

0

1

V

195

s

Load current regulation

0.01

%/mA

NOTES

(1) Excluding gate/base drive current.

(2) IFB is typically half of these at 3V.

(3) Shutdown pin voltage must not exceed (VCC+0.3V) or 5V, whichever is lower.