ISL8022 查看數據表（PDF） - Intersil

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ISL8022

Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Intersil 

ISL8022

Absolute Maximum Ratings (Reference to GND)

Supply Voltage (VIN) . . . . . . -0.3V to 6V (DC) or 7V (20ms)

EN1, EN2, PG, SYNC . . . . . . . . . . . . . . . -0.3V to VIN + 0.3V

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . or 7V (20ms)

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

ESD Rating

Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . 3kV

Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . 250V

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

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

Thermal Information

Thermal Resistance (Typical)

θJA (°C/W) θJC (°C/W)

4x3 DFN Package (Notes 4, 5) . . 41

3

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

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

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

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

Recommended Operating Conditions

VIN Supply Voltage Range . . . . . . . . . . . . . . . . 2.8V to 5.5V

Load Current Range Channel 1. . . . . . . . . . . . . . . . 0A to 2A

Load Current Range Channel 2. . . . . . . . . . . . . . 0A to 1.7A

Ambient Temperature Range . . . . . . . . . . . . -40°C to +85°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. θJC, “case temperature” location is at the center of the exposed metal pad on the package underside.

Electrical Specifications

Unless otherwise noted, all parameter limits are established over the recommended

operating conditions: TA = -40°C to +85°C, VIN = 2.8V to 5.5V, EN1 = EN2 = VIN,

SYNC = 0V, L = 1.2µH, C1 = 2 x 10µF, C2 = C4 = 22µF, IOUT1 = 0A to 2A, IOUT2 = 0A to

1.7A. (Typical values are at TA = +25°C, VIN = 3.6V). Boldface limits apply over the

operating temperature range, -40°C to +85°C.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

MAX

(Note 6) TYP (Note 6) UNITS

INPUT SUPPLY

VIN Undervoltage Lock-out

Threshold

VUVLO

Rising

Falling

2.5

2.8

V

2.0

2.4

V

Quiescent Supply Current

IVIN

SYNC = VIN, EN1 = EN2 = VIN, no

switches switching

40

55

µA

ShutDown Supply Current

OUTPUT REGULATION

SYNC = GND, EN1 = EN2 = VIN,

FS = 2.25MHz, no load at the output

ISD VIN = 5.5V, EN1 = EN2 = GND

0.86

1

mA

6.5

12

µA

FB1, FB2 Regulation Voltage

FB1, FB2 Bias Current

Output Voltage Accuracy

VFB_

0.590 0.6 0.610

V

IFB_ VFB = 0.55V

0.1

µA

SYNC = VIN, Io = 0A to 2A (Note 7)

±1.5

%

SYNC = GND, Io = 0A to 2A (Note 7)

±1

%

Line Regulation

Soft-Start Ramp Time Cycle

VIN = VO + 0.5V to 5.5V (minimal 2.8V)

0.2

2

%/V

ms

OVERCURRENT PROTECTION

Dynamic Current limit ON-time

tOCON

17

Clock

pulses

Dynamic Current Limit OFF-time

Peak Overcurrent Limit

tOCOFF

Ipk1

Ipk2

4

SS cycle

2.7

3.2

3.6

A

2.3

2.8

3.2

A

5

FN7650.1

August 25, 2010

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