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ISL97650

4-Channel Integrated LCD Supply

Intersil 

ISL97650

Electrical Specifications

VIN = 12V, VBOOST = VSUP = 15V, VON = 25V, VOFF = -8V, over-temperature from -40°C to +105°C, unless

otherwise stated. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise

specified. Temperature limits established by characterization and are not production tested. (Continued)

PARAMETER

DESCRIPTION

CONDITIONS

MIN TYP MAX UNIT

VBOOST

IBOOST

EFFBOOST

Boost Output Range

Boost Switch Current

Peak Efficiency

Current limit

See graphs and component

recommendations

1.25

*VIN

20

V

2.6

3.2

3.8

A

90+

%

rDS(ON)

ΔVBOOST/ΔVIN

ΔVBOOST/ΔIOUT

VFBB

Switch On Resistance

Line Regulation

Load Regulation

Boost Feedback Voltage

5V < VIN < 13V

100mA < load < 200mA

TA = +25°C

160

300

mΩ

0.4

1.0

%/V

0.1

0.5

%

1.192 1.205 1.218

V

1.188 1.205 1.222

V

ACCBOOST

tss

VLOGIC BUCK

VBUCK

IBUCK

EFFBUCK

AVDD Output Accuracy

Soft-Start Period for AVDD

Buck Output Voltage

Buck Switch Current

Peak Efficiency

TA = +25°C

CDEL = 220nF

Output current = 0.5A

Current limit

See graphs and component

recommendations

-1.5

1.5

%

9.6

ms

1.5

5.5

V

2.0

2.4

2.9

A

92

%

RDS-ONBK

ΔVBUCK/ΔVIN

ΔVBUCK/ΔIOUT

VFBL

Switch ON-Resistance

Line Regulation

Load Regulation

FBL Regulation Voltage

5V < VIN < 13V

100mA < load < 500mA

TA = +25°C

200

400

mΩ

0.1

1.0

%/V

0.2

1

%

1.176 1.2 1.224

V

1.174 1.2 1.226

V

ACCLOGIC

tssL

VLOGIC Output Accuracy

Soft-Start Period for V(Logic)

TA = +25°C

-2

2

%

C(VREF) = 220nF (Note - no soft-start if EN

0.5

ms

asserted HIGH before ENB)

NEGATIVE (VOFF) CHARGE PUMP

VOFF

VOFF Output Voltage Range

2X Charge Pump

-VSUP

+1.4V

0

V

ILoad_NCP_min

Ron(NOUT)H

Ron(NOUT)L

Ipu(NOUT)lim

Ipd(NOUT)lim

I(NOUT)leak

VFBN

External Load Driving Capability

High-Side Driver ON-Resistance at

NOUT

Low-Side Driver ON-Resistance at

NOUT

Pull-Up Current Limit in NOUT

Pull-Down Current Limit in NOUT

Leakage Current in NOUT

FBN Regulation Voltage

VSUP > 5V

I(NOUT) = +60mA

I(NOUT) = -60mA

V(NOUT) = 0V to V(SUP)-0.5V

V(NOUT) = 0.36V to V(VSUP)

V(FBN) < 0 or EN = LOW

TA = +25°C

30

mA

10

Ω

5

Ω

60

270

mA

-200

-60

mA

-5

5

µA

0.173 0.203 0.233

V

0.171 0.203 0.235

V

ACCN

D_NCP_max

VOFF Output Accuracy

IOFF = 1mA, TA = +25°C

Max Duty Cycle of the Negative Charge

Pump

-3

+3

%

50

%

Rpd(FBN)off

Pull-Down Resistance, Not Active

I(FBN) = 500µA

1.5

3.3

5.5

kΩ

3

FN9198.4

April 17, 2009

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