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ISL97652

4-Channel Integrated LCD Supply with Dual VCOM Amplifiers

Intersil 

ISL97652

Electrical Specifications VIN = 12V, VBOOST = VSUP = 15V, VON = 25V, VOFF = -8V, over temperature from -40°C to +85°C, unless

otherwise stated. (Continued)

PARAMETER

DESCRIPTION

CONDITIONS

MIN

TYP

MAX UNIT

ΔVBOOST/ΔVIN Line Regulation

VIN = 8V to 12V at ILOAD = 200mA,

see “Typical Performance Curves”

on page 6

0.08

%

ΔVBOOST/ΔIOUT Load Regulation

100mA to 500mA, see “Typical

Performance Curves” on page 6

0.5

%

VFB

Boost Feedback Voltage

TA = +25°C

1.252

1.240

1.265 1.278 V

1.265 1.290 V

Dmax_boost

Boost Maximum Duty Cycle

FOSC = 650kHz

90

%

FOSC = 1.3MHz

85

%

Dmin_boost

Boost Minimum Duty Cycle

FOSC = 650kHz

10

%

FOSC = 1.3MHz

20

%

AVDD DELAY SWITCH

RPD

RDS(ON)

SWIMAX

Maximum SWI Voltage

IdelayFET

Delay FET RMS Current Limit

180

240 mΩ

21

V

1.5

2

A

FETtimeout

Delay FET Fault Timeout

I(SWO) > IdelayFET

100

µs

Ipull-Down

Pull-down Current Applied to FET Gate and

SUI

65

µA

VGATE

SUI Voltage When Switch is Fully Switched

On

V(SWI) - 5

V

SWILEAK

SWI Leakage Current When Disabled

VIN = 15V, SWI = 21V, SWO = 0V,

EN1 = EN2 = 0V

1

µA

VDSOK

Drain Source Voltage When Boost is Enabled SWI =16.5V

15.7

V

VDSHYS

Hysteresis on VDSOK Spec

SWI =16.5V

1.4

V

VLOGIC BUCK

IBUCK

Buck Switch Current

Current limit

2.5

A

EFFBUCK

Peak Efficiency

See graphs and component

recommendations

85

%

RDS(ON) BK

ΔVBUCK/ΔVIN

Switch On Resistance

Line Regulation

VIN = 8V to 12V at ILOAD = 200mA,

see “Typical Performance Curves”

on page 6

170

250 mΩ

0.05

%

ΔVBUCK/ΔIOUT Load Regulation

200mA to 1000mA, see “Typical

Performance Curves” on page 6

0.1

%

VFBB

FBL Regulation Voltage

TA = +25°C

1.252

1.240

1.265 1.278 V

1.265 1.290 V

Dmax_buck

Buck Maximum Duty Cycle

Dmin_buck

Buck Minimum Duty Cycle

NEGATIVE (VOFF) CHARGE PUMP

VOFF

VOFF Output Voltage Range

ILoad_NCP_min External Load Driving Capability

FOSC = 650kHz

FOSC = 1.3MHz

FOSC = 650kHz

FOSC = 1.3MHz

1X Charge Pump

VSUP >5V

90

85

10

20

VSUP + 1.4V

30

%

%

%

%

0

V

mA

3

FN9287.1

November 2, 2007

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