ISL6421

FN9130 Rev 1.00

Page 4 of 11

Jul 2004

Absolute Maximum Ratings

Thermal Information

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0V to 18.0V

Logic Input Voltage Range (SDA, SCL, ENT) . . . . . . . . -0.5V to 7V

Output Current . . . . . . . . . . . . . . . . . . . . Externally/Internally Limited

Thermal Resistance

JA (oC/W) JC (oC/W)

QFN Package (Notes 1, 2). . . . . . . . . .

32

4

Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . 150oC

Maximum Storage Temperature Range . . . . . . . . . . -40oC to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC

(SOIC - Lead Tips Only)

NOTE: The device junction temperature should be kept below

150oC. Thermal shut-down circuitry turns off the device if junction

temperature exceeds +150oC typically.

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the

device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTES:

1.

JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See

Tech Brief TB379.

2.

For

JC, the “case temperature” location is the center of the exposed metal pad on the package underside. See Tech Brief TB379.

Electrical Specifications

VCC = 12V, TA = -20oC to +85oC, unless otherwise noted. Typical values are at TA = 25oC. EN = H, LLC = L,

ENT = L, DCL = L, DSQIN = L, IOUT = 12mA, unless otherwise noted. See software description section for I2C

access to the system.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Operating Supply Voltage Range

812

14

V

Standby Supply Current

EN = L

-

1.5

3.0

mA

Supply Current

IIN

EN = LLC = VSEL = ENT = H, No Load

-

4.0

8.0

mA

UNDER VOLTAGE LOCKOUT

Start Threshold

7.5

-

7.95

V

Stop Threshold

7.0

-

7.55

V

Start to Stop Hysteresis

350

400

500

mV

SOFT START

COMP Rise Time (Note 2)

(Note 4)

-

1024

-

Cycles

OUTPUT VOLTAGE

Output Voltage (Note 3)

VOUT

VSEL = L, LLC = L

12.74

13.0

13.26

V

VOUT

VSEL = L, LLC = H

13.72

14.0

14.28

V

VOUT

VSEL = H, LLC = L

17.64

18.0

18.36

V

VOOU

VSEL = H, LLC = H

18.62

19.0

19.38

V

Line Regulation

DVOUT

VIN = 8V to 14V; VOUT = 13V

-

4.0

40.0

mV

VIN = 8V to 14V; VOUT = 18V

-

4.0

60.0

mV

Load Regulation

DVOUT

IO = 12mA to 450mA

-

50

80

mV

Dynamic Output Current Limiting

IMAX

DCL = L

575

-

950

mA

Dynamic Overload Protection Off Time

TOFF

DCL = L, Output Shorted (Note 4)

-

900

-

ms

Dynamic Overload Protection On Time

TON

-

20

-

ms

22kHz TONE

Tone Frequency

ftone

ENT = H

20.0

22.0

24.0

kHz

Tone Amplitude

Vtone

ENT = H

550

680

900

mV

Tone Duty Cycle

dctone

ENT = H

405060

%

Tone Rise or Fall Time

Tr, Tf

ENT = H

5

8

14

s