ISL97702 datasheet(3/13 Pages) INTERSIL

Part #	ISL97702

Description	Boost with Dual Reference Outputs

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Manufacturer	INTERSIL [Intersil Corporation]

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3

FN7462.0

October 13, 2005

Absolute Maximum Ratings (TA = 25°C)

VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6V

VOUT to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 31V

LX to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VOUT+1V

VDDOUT, NSYNC, FB0, FB1, SEL, NEN

to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VDD+0.3V

Continuous Current in VDD, GND, VDDOUT, LX . . . . . . . . . 650mA

Continuos Current in NSYNC, FB0, FB1, SEL, NEN. . . . . . . . 10mA

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

TA Ambient Operating Temperature. . . . . . . . . . . . .-40°C to +85°C

TJ Operating Junction Temperature. . . . . . . . . . . . . . . . . . . +125°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.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed.

Electrical Specifications

VDD = 3.6V, GND = NEN = 0V, SEL = NSYNC = VDD, R1 = 390K, R2 = 39K, R3 = 26.1K,

L = 10µH, TA = -40°C to +85°C unless otherwise stated

PARAMETER

DESCRIPTION

CONDITION

MIN

TYP

MAX

UNIT

SUPPLY

VDD

Supply Operating Voltage Range

2.3

5.5

V

IDIS

Supply Current when Disabled

NEN = VDD

0.1

3

µA

LOGIC INPUTS – NEN, NSYNC, SEL

Rup

Pull-up Resistor

Enabled, Input at GND

150

250

350

k

Ω

IIL

Leakage Current when Disabled

Disabled, Input at GND

-1

1

µA

VHI

Logic High Threshold

1.8

V

VLO

Logic Low Threshold

0.7

V

POWER-ON RESET – VDD

VRES_ON

Power On Reset Threshold

VDD rising

2.2

2.3

V

VRES_OFF

Power Off Threshold

VDD falling

1.9

2

V

LX OUTPUT DRIVER

fosc

LX Switching Frequency with Internal

Oscillator

0.9

1

1.1

MHz

fsync

LX Switching Frequency when

Externally Synchronized at NSYNC

f

(NSYNC)

-

ton-min

Minimum On-Time

FB1 = 0V, I(LX) > Ilim(LX)

60

ns

toff-min

Minimum Off-time

(

≥ Maximum Duty Cycle)

FB1 = 0V, I(LX) < Ilim(LX)

60

ns

Ron

LX On-Resistance

I(LX) = 100mA

0.4

Ω

Ileak

LX Leakage Current

NEN = VDD, V(LX) = 30V

1

5

µA

Ipeak

LX Peak Current Limit

t > 8.32ms (end of soft-start)

1200

mA

SCHOTTKY DIODE – LX, VOUT

Vdiode

Forward Voltage from LX to VOUT

I = 10mA, TA = +25°C

0.4

0.5

0.6

V

I = 10mA, TA = -40°C to +85°C

0.3

0.5

0.7

V

FEEDBACK INPUTS AND SELECTION – FB0, FB1, SEL

VrefFB0

Input Reference Voltage on FB0

SEL = GND, TA = +25°C

1.13

1.15

1.17

V

SEL = GND, TA = -40°C to +85°C

1.12

1.15

1.18

v

VrefFB1

Input Reference Voltage on FB1

SEL = VDD, TA = +25°C

1.135

1.15

1.165

V

SEL = GND, TA = -40°C to +85°C

1.125

1.15

1.175

V

IFB0

Input Current in FB0

SEL = GND, FB0 = 1.3V

-0.2

0.2

µA

IFB1

Input Current in FB1

SEL = VDD, FB1 = 1.3V

-0.2

0.2

µA

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