ISL78100 datasheet(2/19 Pages) INTERSIL

2 / 19 page

FN6626.0

December 17, 2007

Absolute Maximum Ratings (TA = +25°C)

Thermal Information

Maximum pin voltage, all pins except below 6.5V

VIN, SWS1, SWS2, EN/PWM . . . . . . . . . . . . . . . . . . . . . . . . . . .18V

VBAT, FAULT, FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24V

|VHI - SWS1, SWS2| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V

SWD1, SWD2, OVP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34V

Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A

Operating Conditions

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +105°C

Thermal Resistance

θJA (°C/W) / θJC (°C/W)

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

2.5

Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +135°C

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and

result in failures not covered by warranty.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests

are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA

NOTES:

θJA 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

θJC, the “case temp” location is the center of the exposed metal pad on the package underside.

Electrical Specifications

VBAT = VIN = 12V, VDC = 5V, TA = -40°C to +105°C unless otherwise specified.

PARAMETER

DESCRIPTION

CONDITIONS

MIN

TYP

MAX

UNIT

VIN

Input Supply Voltage

IOUT = 350mA, 8 LEDs, BUCK/BOOSTN = GND

VIN

Input Supply Voltage

IOUT = 350mA, 5 LEDs, BUCK/BOOSTN = GND,

TMAX disabled

2.7

VBAT

Input Supply Monitor

Normal operating range

2.7

VBATFAULT

Supply Fault Threshold

If VBAT > VBATFAULT, FAULT pin is switched to

ground

17.6

ISEN

Supply Current in VIN

No switching, EN/PWM = 1

2.7

3.5

ISDIS

Supply Current in VIN

No switching, EN/PWM = 0

0.6

2.5

µA

RSWITCH

Power FET On-Resistance

ISWITCH = 600mA

0.15

0.25

VDC

Regulated Auxiliary Supply

4.75

5.25

ROUTOL

Auxiliary Supply Open Loop Output

Resistance

VIN < VDC

ROUTCL

Auxiliary Supply Closed Loop Output

Resistance

VIN > 6V, F < 100Hz

6.5

IOUT

Output Drive Current

4 LED output string. VIN = VBAT = 10V

ILIMBOOST

Power Switch Current Limit

BUCK/BOOSTN = GND

3.6

ILIMBUCK

Power Switch Current Limit

BUCK/BOOSTN = VDC

2.4

OVPH

Overvoltage Positive Going Voltage

Mode Threshold

Upper threshold to enter overvoltage fault mode,

TA = +25°C

OVPL

Overvoltage Negative Going Voltage

Mode Threshold

Lower threshold to exit overvoltage fault mode,

TA = +25°C

VGATE

Protection FET VGS (Gate Clamp)

VIN - VFAULT

9.76

12.2

14.64

VGATE

Protection FET VGS (Gate Clamp)

VFAULT - VIN

8.16

10.2

12.24

VFB

Feedback Voltage

System in regulation, VLEVEL = 1V,

VIN = 12V, 6 LEDs

0.18

0.2

0.22

VLEVEL

Light Control Voltage Linear Input

Range

Mode = 1, analog control of LED current

0.25

FBUV FAULT

Feedback Undervoltage Fault

VLEVEL = 1V, EN/PWM = 3V

100

160

200

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