ABSOLUTE MAXIMUM RATINGS

(Voltages to GND unless otherwise stated)

Output voltage

30V

Input voltage

7V

Switch output current

500mA

Power dissipation

800mW

Operating temperature

0 to 70 C

Storage temperature

-55 to 125 C

Junction temperature

150 C

ZXLB1600

ISSUE 3 - SEPTEMBER 2003

SEMICO NDUC TORS

2

Symbol

Parameter

Conditions

Min

Typ

Max

Units

General

Input voltage

(1)

1.6

5.5

V

Supply current Shutdown

(2)

3.5

5

A

Quiescent

switching

30

75

A

Isolating switch

‘On’ resistance

0.7

2

Leakage current

1

A

Maximum voltage on SW pin

during normal operation

V

V

LX Switch

Switch peak current limit

(3)

0.15

0.35

A

‘On’ resistance

0.5

2

Switch leakage current

1

A

Operating voltage on LX pin

-0.5

30

V

Controller output

Output voltage range

V

IN

28

V

Output current

5

10

mA

Line regulation

0.1

%/V

Load regulation

< 5mA

0.15

%/mA

Operating frequency

500

kHz

Output ‘ON’ time

LX output low

10

s

Output ‘OFF’ time

LX output off

0.9

µs

Efficiency

(4)

80

%

ELECTRICAL CHARACTERISTICS

Note:

1)

Minimum supply voltage should be maintained above 2V for operation at minimum temperature.

2)

Shutdown current includes the operating current for the low battery comparator, which remains active in shutdown mode.

3)

This is the dc value. The dynamic value may exceed 350mA during normal operation, due to switching delays, coil inductance and supply

voltage.

4)

Efficiency is dependent upon the choice of external components, input/output voltages and load current.(see typical operating curves).