intersil FN7415.2, EL7640, EL7641, EL7642 DATA SHEET

®

EL7640, EL7641, EL7642

Data Sheet February 22, 2006

TFT-LCD DC/DC with Integrated Amplifiers

The EL7640, EL7641, and EL7642 integrate a high performance boost regulator with 2 LDO controllers for V and V

, a VON-slice circuit with adjustable delay and

OFF

ON

either one (EL7640), three (EL7641), or five amplifiers (EL7642) for V

COM

and V

GAMMA

applications.

The boost converter in the EL7640, EL7641, and EL7642 is a current mode PWM type integrating an 18V N-channel MOSFET. Operating at 1.2MHz, this boost can operate in either P-mode for superior transient response, or in PI-mode for tighter output regulation.

Using external low-cost transistors, the LDO controllers provide tight regulation for V

ON

, V

, as well as providing

OFF

start-up sequence control and fault protection.

The amplifiers are ideal for V

COM

and V

GAMMA

applications, with 150mA peak output current drive, 12MHz bandwidth, and 12V/µs slew rate. All inputs and outputs are rail-to-rail.

Available in the 32 Ld thin QFN (5mm x 5mm) Pb-free packages, the EL7640, EL7641, and EL7642 are specified for operation over the -40°C to +85°C temperature range.

Ordering Information

PART NUMBER

(Note)

EL7640ILTZ 7640ILTZ - 32 Ld 5x5

EL7640ILTZ-T7 7640ILTZ 7” 32 Ld 5x5

EL7640ILTZ-T13 7640ILTZ 13” 32 Ld 5x5

EL7641ILTZ 7641ILTZ - 32 Ld 5x5

EL7641ILTZ-T7 7641ILTZ 7” 32 Ld 5x5

EL7641ILTZ-T13 7641ILTZ 13” 32 Ld 5x5

EL7642ILTZ 7642ILTZ - 32 Ld 5x5

EL7642ILTZ-T7 7642ILTZ 7” 32 Ld 5x5

EL7642ILTZ-T13 7642ILTZ 13” 32 Ld 5x5

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

PAR T

MARKING

TAPE &

REEL

PACKAGE

(Pb-Free)

Thin QFN

PKG.

DWG. #

MDP0051

FN7415.2

Features

• Current mode boost regulator

- Fast transient response

- 1% accurate output voltage

- 18V/3A integrated FET

- >90% efficiency

• 2.6V to 5.5V V

• 2 LDO controllers for V

supply

IN

ON

and V

OFF

- 2% output regulation

-slice circuit

-V

ON

• High speed amplifiers

- 150mA short-circuit output current

-12V/µs slew rate

- 12MHz -3dB bandwidth

- Rail-to-rail inputs and outputs

• Built-in power sequencing

• Internal soft-start

• Multiple overload protection

• Thermal shutdown

• 32 Ld 5x5 thin QFN package

• Pb-Free plus anneal available (RoHS compliant)

Applications

• TFT-LCD panels

• LCD monitors

• Notebooks

•LCD-TVs

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Pinouts

EL7640

(32 LD QFN)

TOP VIEW

EL7640, EL7641, EL7642

EL7641

(32 LD QFN)

TOP VIEW

COM

DRN

CTL

DEL

DRVN

32

31

30

29

28

1

SRC

REF

2

AGND

3

PGND

4

OUT1

5

NEG1

6

POS1

7

NC

8 17

NC

NC = NOT INTERNALLY CONNECTED IC = INTERNALLY CONNECTED

10 IC

THERMAL

PAD

11

12

NC

BGND

13

NC

EL7642

(32 LD QFN)

TOP VIEW

DRVP

26925

152716

NC

FBP

NC

24

23

22

21

20

19

18

COMP

FB

IN

LX

NC

IC

NC

COM

DRN

CTL

DEL

DRVN

32

31

30

29

28

1

SRC

REF

2

AGND

3

PGND

4

OUT1

5

NEG1

6

POS1

7

OUT2

8 17

NEG2

NC = NOT INTERNALLY CONNECTED IC = INTERNALLY CONNECTED

10

POS2

THERMAL

PAD

11

12

NC

BGND

13

NC

DRVP

26925

152716

POS3

FBP

24

23

22

21

20

19

18

NEG3

COMP

FB

IN

LX

NC

IC

OUT3

FBN

14

SUP

FBN

14

SUP

COM

DRN

CTL

DEL

DRVN

32

31

30

29

28

1

SRC

REF

2

AGND

3

PGND

4

OUT1

5

NEG1

6

POS1

7

OUT2

8 17

NEG2

10

POS2

THERMAL

PAD

11

12

POS3

BGND

13

OUT3

DRVP

26925

152716

POS4

FBP

24

23

22

21

20

19

18

NEG4

COMP

FB

IN

LX

OUT5

NEG5

POS5

OUT4

FBN

14

SUP

2

FN7415.2

February 22, 2006

EL7640, EL7641, EL7642

Absolute Maximum Ratings (T

IN, CTL to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V

COMP, FB, FBP, FBN, DEL, REF to AGND. . . . . -0.3V to V

PGND, BGND to AGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3V

LX to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +24V

SUP to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +18V

DRVP, SRC to AGND . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +36V

POS1, NEG1, OUT1, POS2, NEG2, OUT2, POS3, OUT3, POS4, NEG4, OUT4, POS5, OUT5 to AGND . .-0.3V to V

DRVN to AGND . . . . . . . . . . . . . . . . . . . . . . . V

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. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = T

Electrical Specifications V

IN

= 25°C)

A

= 3V, V

IN

= V

SUP

-20V to VIN +0.3V

IN

BOOST

+0.3V

A

= 12V, V

COM, DRN to AGND . . . . . . . . . . . . . . . . . . . . -0.3V to V

LX Maximum Continuous RMS Output Current. . . . . . . . . . . . . 1.6A

OUT1, OUT2, OUT3, OUT4, OUT5

Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . ±75mA

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

Maximum Continuous Junction Temperature . . . . . . . . . . . . +125°C

Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves

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

= 20V, Over temperature from -40°C to 85°C.

SRC

+0.3V

Unless Otherwise Specified.

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

SUPPLY

V

I

T

V

IN

LOR

LOF

S

SS

FD

REF

Input Supply Range 2.6 5.5 V

Undervoltage Lockout Threshold VIN rising 2.4 2.5 2.6 V

Undervoltage Lockout Threshold VIN falling 2.2 2.3 2.4 V

Quiescent Current LX not switching 2.5 mA

Quiescent Current - Switching LX switching 5 10 mA

Fault Delay Time C

= 220nF 52 ms

DEL

Reference Voltage TA= 25°C 1.19 1.215 1.235 V

1.187 1.215 1.238 V

SHUTDN Thermal Shutdown Temperature 140 °C

MAIN BOOST REGULATOR

V

BOOST

Output Voltage Range (Note 1) VIN+

18 V

15%

F

D

V

OSC

CM

FBB

Oscillator Frequency 1050 1200 1350 kHz

Maximum Duty Cycle 82 85 %

Boost Feedback Voltage TA= 25°C 1.192 1.205 1.218 V

1.188 1.205 1.222 V

V

FTB

∆V ∆I

BOOST

∆V ∆V

I

FB

BOOST

BOOST IN

FB Fault Trip Level Falling edge 0.85 0.925 1.020 V

/

Load Regulation 50mA < I

/

Line Regulation VIN = 2.6V to 5.5V 0.08 %/V

< 250mA 0.1 %

LOAD

Input Bias Current VFB = 1.35V 500 nA

gmV FB Transconductance dI = ±2.5µA at COMP, FB = COMP 160 µA/V

R

LX LX On Resistance 160 mΩ

ON

LX LX Leakage Current VFB = 1.35V, V

I

LEAK

I

LX LX Current Limit Duty cycle = 65% (Note 1) 3.0 A

LIM

t

B Soft-Start Period C

SS

= 220nF 2 ms

DEL

= 13V 0.02 40 µA

LX

3

FN7415.2

February 22, 2006

EL7640, EL7641, EL7642

Electrical Specifications V

IN

= 3V, V

BOOST

= V

SUP

= 12V, V

= 20V, Over temperature from -40°C to 85°C.

SRC

Unless Otherwise Specified. (Continued)

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

OPERATIONAL AMPLIFIERS

V

SUP

I

SUP

V

OS

I

B

CMIR Common Mode Input Range 0 V

Supply Operating Range 4.5 18 V

Supply Current per Amplifier 600 800 µA

Offset Voltage 312mV

Input Bias Current -50 +50 nA

SUP

V

CMRR Common Mode Rejection Ratio 60 90 dB

A

OL

V

OH

V

OL

I

SC

I

CONT

Open Loop Gain 110 dB

Output Voltage High I

Output Voltage Low I

= 100µA V

OUT

I

= 5mA V

OUT

-15

-250

= -100µA 2 30 mV

OUT

I

= -5mA 100 150 mV

OUT

SUP

V

-150

SUP

-2

SUP

mV

Short-Circuit Current 100 150 mA

Continuous Output Current ±50 mA

PSRR Power Supply Rejection Ratio 60 100 dB

BW

-3dB

-3dB Bandwidth 12 MHz

GBWP Gain Bandwidth Product 8MHz

SR Slew Rate 12 V/µs

POSITIVE LDO

V

FBP

V

FTP

I

BP

/

∆V

POS

∆I

POS

I

DRVP

I

P DRVP Off Leakage Current V

LEAK

t

P Soft-Start Period C

SS

Positive Feedback Voltage I

V

Fault Trip Level V

FBP

Positive LDO Input Bias Current V

FBP Load Regulation V

Sink Current V

= 100µA, TA = 25°C 1.176 1.2 1.224 V

DRVP

I

= 100µA 1.176 1.2 1.229 V

DRVP

falling 0.82 0.9 0.98 V

FBP

= 1.4V -50 50 nA

FBP

= 25V, I

DRVP

= 1.1V, V

FBP

= 1.4V, V

FBP

= 220nF 2 ms

DEL

= 0 to 20µA 0.5 %

DRVP

= 10V 2 4 mA

DRVP

= 30V 0.1 10 µA

DRVP

NEGATIVE LDO

V

FBN

V

FTN

I

BN

I

DRVN

N DRVN Off Leakage Current V

I

LEAK

t

N Soft-start Period C

SS

FBN Regulation Voltage I

V

Fault Trip Level V

FBN

Negative LDO Input Bias Current V

FBN Load Regulation V

Source Current V

= 0.2mA, TA = 25°C 0.173 0.203 0.233 V

DRVN

I

= 0.2mA 0.171 0.203 0.235 V

DRVN

rising 380 430 480 mV

FBN

= 250mV -50 50 nA

FBN

= -6V, I

DRVN

= 500mV, V

FBN

= 1.35V, V

FBP

= 220nF 2 ms

DEL

= 2µA to 20µA 0.5 %

DRVN

= -6V 2 4 mA

DRVN

= 30V 0.1 10 µA

DRVP

4

FN7415.2

February 22, 2006

EL7640, EL7641, EL7642

Electrical Specifications V

IN

= 3V, V

BOOST

= V

SUP

= 12V, V

= 20V, Over temperature from -40°C to 85°C.

SRC

Unless Otherwise Specified. (Continued)

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

VON-SLICE CIRCUIT

V

LO

V

HI

I

CTL CTL Input Leakage Current CTL = AGND or IN -1 1 µA

LEAK

t

rise CTL to OUT Rising Prop Delay 1kΩ from DRN to 8V, V

D

t

fall CTL to OUT Falling Prop Delay 1kΩ from DRN to 8V, V

D

V

SRC

CTL Input Low Voltage VIN = 2.6V to 5.5V 0.4V

CTL Input High Voltage VIN = 2.6V to 5.5V 0.6V

= 0V to 3V step, no load on OUT, measured from V to OUT = 20%

no load on OUT, measured from V to OUT = 80%

CTL

= 3V to 0V step,

CTL

= 1.5V

IN

100 ns

IN

SRC Input Voltage Range 30 V

ISRC SRC Input Current Start-up sequence not completed 150 250 µA

Start-up sequence completed 150 250 µA

R

SRC SRC On Resistance Start-up sequence completed 5 10 Ω

ON

R

DRN DRN On Resistance Start-up sequence completed 30 60 Ω

ON

RONCOM COM to GND On Resistance Start-up sequence not completed 350 1000 1800 Ω

SEQUENCING

t

ON

t

DEL1

t

DEL2

t

DEL3

C

DEL

Turn On Delay C

Delay Between V

Delay Between VON and V

BOOST

and V

OFF

Delay From VON to VON-slice Enabled C

= 0.22µF (See Figure 23) 30 ms

DLY

C

= 0.22µF (See Figure 23) 10 ms

DLY

C

= 0.22µF (See Figure 23) 17 ms

DLY

= 0.22µF (See Figure 23) 10 ms

DLY

Delay Capacitor 50 220 nF

NOTE:

1. Guaranteed by design.

V

5

FN7415.2

February 22, 2006

EL7640, EL7641, EL7642

Pin Descriptions

PIN NAME EL7642 EL7641 EL7640 PIN FUNCTION

SRC 1 1 1 Upper reference voltage for switch output

REF 2 2 2 Internal reference bypass terminal

AGND 3 3 3 Analog ground for boost converter and control circuitry

PGND 4 4 4 Power ground for boost switch

OUT1 5 5 5 Operational amplifier 1 output

NEG1 6 6 6 Operational amplifier 1 inverting input

POS1 7 7 7 Operational amplifier 1 non-inverting input

OUT2 8 8 - Operational amplifier 2 output

NEG2 9 9 - Operational amplifier 2 inverting input

POS2 10 10 - Operational amplifier 2 non-inverting input

BGND 11 11 11 Operational amplifier ground

POS3 12 15 - Operational amplifier 3 non-inverting input

NEG3 - 16 - Operational amplifier 3 inverting input

OUT3 13 17 - Operational amplifier 3 output

SUP 14 14 14 Amplifier positive supply rail. Bypass to BGND with 0.1µF capacitor

POS4 15 - - Operational amplifier 4 non-inverting input

NEG4 16 - - Operational amplifier 4 inverting input

OUT4 17 - - Operational amplifier 4 output

POS5 18 - - Operational amplifier 5 non-inverting input

NEG5 19 - - Operational amplifier 5 inverting input

OUT5 20 - - Operational amplifier 5 output

LX 21 21 21 Main boost regulator switch connection

IN 22 22 22 Main supply input; bypass to AGND with 1µF capacitor

FB 23 23 23 Main boost feedback voltage connection

COMP 24 24 24 Error amplifier compensation pin

FBP 25 25 25 Positive LDO feedback connection

DRVP 26 26 26 Positive LDO transistor drive

FBN 27 27 27 Negative LDO feedback connection

DRVN 28 28 28 Negative LDO transistor driver

DEL 29 29 29 Connection for switch delay timing capacitor

CTL 30 30 30 Input control for switch output

DRN 31 31 31 Lower reference voltage for switch output

COM 32 32 32 Switch output; when CTL = 1, COM is connected to SRC through a 15Ω

resistor; when CTL = 0, COM is connected to DRN through a 30Ω resistor

6

FN7415.2

February 22, 2006