ISL8088(2009) 查看數據表（PDF） - Intersil

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ISL8088
(Rev.:2009)

Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

Intersil 

ISL8088

Absolute Maximum Ratings (Reference to GND)

Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . -0.3V to 6.5V

VIN . . . . . . . . . . . . . . . . . . . . . . .. . . . .-0.3V to 7V (20ms)

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

LX1, LX2 . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5V to 6.5V

LX1, LX2 . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5V (100ns)

. . . . . . . . . . . . . . . . . . . . . . . . -0.3V (DC) to 7V (20ms)

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

ESD Rating

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

Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . 300V

Thermal Information

Thermal Resistance (Typical, Notes 4, 5) θJA (°C/W) θJC (°C/W)

10 Ld 3x3 DFN Package . . . . . . . 49

4

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 . . . . . . . . . . . . . . . 2.75V to 5.5V

Load Current Range Per Channel. . . . . . . . . . 0mA to 800mA

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

Junction Temperature Range . . . . . . . . . . -40°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, all parameter limits are established over the recommended

operating conditions: TA = -40°C to +85°C, VIN = 2.75V to 5.5V, EN1 = EN2 = VIN, SYNC =

0V, L = 2.2µH, C1 = 10µF, C2 = C4 = 10µF, IOUT1 = IOUT2 = 0A to 800mA. (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 Lockout Threshold

VUVLO

Rising

Falling

2.5 2.75

V

2.1

2.4

V

Quiescent Supply Current

IVIN

SYNC = VIN, EN1 = EN2 = VIN, no

load at the output and no switches

switching.

VFB1 = VFB2 = 0.7V

30

50

µA

Shut Down Supply Current

OUTPUT REGULATION

SYNC = GND, EN1 = EN2 = VIN,

FS = 2.25MHz, no load at the output

ISD VIN = 5.5V, EN1 = EN2 = GND

0.1

1

mA

6.5

12

µA

FB1, FB2 Regulation Voltage

FB1, FB2 Bias Current

Line Regulation

Soft-Start Ramp Time Cycle

VFB_

IFB_

VFB = 0.55V

VIN = VO + 0.5V to 5.5V (minimal

2.75V, IOUT = 0A)

0.590 0.6 0.610

0.1

0.2

V

µA

%/V

2

ms

OVERCURRENT PROTECTION

Peak Overcurrent Limit

Peak SKIP Limit

LX1, LX2

Ipk1

Ipk2

Iskip1

Iskip2

VIN = 3.6V

0.95 1.2

1.6

A

0.95 1.2

1.6

A

180 250 360

mA

180 250 360

mA

P-Channel MOSFET ON-Resistance

VIN = 5.5V, IO = 200mA

VIN = 2.75V, IO = 200mA

180 350

mΩ

320 450

mΩ

4

FN6858.0

September 21, 2009

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