ISL8033AIRZ datasheet(6/17 Pages) INTERSIL

Part #	ISL8033AIRZ

Description	Dual 3A Low Quiescent Current High Efficiency Synchronous Buck Regulator

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Manufacturer	INTERSIL [Intersil Corporation]

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6

FN6854.1

October 21, 2010

Absolute Maximum Ratings (Reference to SGND)

Thermal Information

VIN1,VIN2, VDD. . . . . . . . -0.3V to 6.5V (DC) or 7V (20ms)

LX1, LX2. . . -1.5V (100ns)/-0.3V (DC) to 6.5V (DC) or 7V (20ms)

EN1, EN2, PG1, PG2, SYNC, ISET . . . . . . . . . -0.3V to +6.5V

FB1, FB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V

NC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V

ESD Ratings

Human Body Model (Tested per JESD22-A114) . . . . . . 4kV

Charged Device Model (Tested per JESD22-C101E) . . . 2kV

Machine Model (Tested per JESD22-A115) . . . . . . . . 0.3kV

Latch Up (Tested per JESD-78A; Class 2, Level A) . . . 100mA

Thermal Resistance (Typical)

θJA (°C/W) θJC (°C/W)

4x4 QFN Package (Notes 4, 5). . .

36

2

Junction Temperature Range . . . . . . . . . . -55°C to +150°C

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

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

Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below

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

Recommended Operating Conditions

VIN Supply Voltage Range . . . . . . . . . . . . . . . . 2.85V to 6V

Load Current Range per Channel. . . . . . . . . . . . . . 0A to 3A

Junction Temperature Range . . . . . . . . . . -55°C to +125°C

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.

NOTES:

4. 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.

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

Electrical Specifications Unless otherwise noted, the typical specifications are measured at the following conditions:

TA = -40°C to +85°C, VIN = 3.6V, EN1 = EN2 = VDD, L = 1.5µH, C1 = C2 = C4 = 2x22µF, IOUT1 = IOUT2 = 0A to 3A. Typical

values are at TA = +25°C. Boldface limits apply over the operating temperature range, -40°C to +85°C.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

(Note 7) TYP

MAX

(Note 7)

UNITS

INPUT SUPPLY

VIN Undervoltage Lockout Threshold

VUVLO Rising

2.5

2.85

V

Hysteresis

50

100

mV

Quiescent Supply Current

IVDD

SYNC = VDD, EN1 = EN2 = VDD,

FS = 1MHz, no load at the output

15

40

mA

SYNC = VDD, EN1 = EN2 = VDD,

FS = 2.5MHz, no load at the output

30

70

mA

Shutdown Supply Current

ISD

VDD = 6V, EN1 = EN2 = SGND

8

20

µA

OUTPUT REGULATION

FB1, FB2 Regulation Voltage

VFB

0.790

0.8

0.810

V

FB1, FB2 Bias Current

IFB

VFB = 0.75V

0.1

µA

Load Regulation

SYNC = VDD, output load from 0A to 3A

2

mV/A

Line Regulation

VIN = VO + 0.5V to 6V (minimal 2.85V)

0.1

%/V

Soft-Start Ramp Time Cycle

1.5

ms

COMPENSATION

Error Amplifier Trans-Conductance

20

µA/V

Trans-Resistance

RT

0.18

0.2

0.22

Ω

OVERCURRENT PROTECTION

Dynamic Current Limit ON-time

tOCON

17

Clock pulses

Dynamic Current Limit OFF-time

tOCOFF

8

SS cycle

Positive Peak Overcurrent Limit

Ipoc1

ISET = VDD

4.1

4.8

5.5

A

Ipoc2

4.1

4.8

5.5

A

Ipoc1

ISET = Float

4.1

4.8

5.5

A

Ipoc2

2.7

3.3

3.9

A

Ipoc1

ISET = GND

2.7

3.3

3.9

A

Ipoc2

2.7

3.3

3.9

A

ISL8033, ISL8033A

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