ISL6443IR datasheet(5/18 Pages) INTERSIL

Part #	ISL6443IR

Description	300kHz Dual, 180째 Out-of-Phase, Step- Down PWM and Single Linear Controller

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Manufacturer	INTERSIL [Intersil Corporation]

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5 / 18 page

5

FN9044.2

August 9, 2006

Absolute Maximum Ratings

Thermal Information

Supply Voltage (VCC_5V Pin) . . . . . . . . . . . . . . . . . . . . -0.3V to +7V

Input Voltage (VIN Pin). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+27V

BOOT1, 2 and UGATE1, 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . +35V

PHASE1, 2 and ISEN1, 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . +27V

BOOT1, 2 with Respect to PHASE1, 2 . . . . . . . . . . . . . . . . . . +6.5V

UGATE1, 2. . . . . . . . . . . . (PHASE1, 2 - 0.3V) to (BOOT1, 2 +0.3V)

Thermal Resistance (Typical)

θJA (°C/W) θJC (°C/W)

28 Lead QFN (Note 1) . . . . . . . . . . .

36

5.5

Maximum Junction Temperature (Plastic Package) . -55°C to 150°C

Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C

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.

NOTE:

1.

θJC is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. For θJA

the “case temp” location is the center of the exposed metal pad on the underside of the package. See Tech Brief TB379.

Electrical Specifications

Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application

Schematic. VIN = 5.6V to 24V, or VCC_5V = 5V ±10%, TA = -40°C to 85°C (Note 2),

Typical values are at TA = 25°C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VIN SUPPLY

Input Voltage Range

5.6

12

24

V

VCC_5V SUPPLY (Note 3)

Input Voltage

4.5

5.0

5.6

V

Output Voltage

VIN > 5.6V, IL = 20mA

4.5

5.0

5.5

V

Maximum Output Current

VIN = 12V

60

-

mA

SUPPLY CURRENT

Shutdown Current (Note 4)

SD1 = SD2 = GND

-

50

375

µA

Operating Current (Note 5)

-

2.0

4.0

mA

REFERENCE SECTION

Nominal Reference Voltage

-

0.8

-

V

Reference Voltage Tolerance

-1.0

-

1.0

%

POWER-ON RESET

Rising VCC_5V Threshold

4.25

4.45

4.5

V

Falling VCC_5V Threshold

3.95

4.2

4.4

V

OSCILLATOR

Total Frequency Variation

260

300

340

kHz

Peak-to-Peak Sawtooth Amplitude (Note 6)

VIN = 12V

-

1.6

-

V

VIN = 5V

-

0.667

-

V

Ramp Offset (Note 7)

-1.0

-

V

SYNC Input Rise/Fall Time (Note 7)

-

10.0

ns

SYNC Frequency Range

4.16

4.8

5.44

MHz

SYNC Input HIGH Level

3.5

-

V

SYNC Input LOW Level

--

1.5

V

SYNC Input Minimum Pulse Width (Note 7)

10

-

ns

SYNC Output HIGH Level

VCC - 0.6V

-

V

SHUTDOWN1/SHUTDOWN2

HIGH Level (Converter Enabled)

Internal Pull-up (3

µA)

2.0

-

V

LOW Level (Converter Disabled)

-

0.8

V

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