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Renesas Electronics Components Datasheet

EL7584 Datasheet

4-Channel DC/DC Converter

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EL7584
4-Channel DC/DC Converter
OBSOLETE PRODUCT
FOR A POSSIBLE SUBSTITUTE PRODUCT
contact our Technical Support Center at
1-888-INTERSIL or www.intersil.com/tsc
DATASHEET
FN7317
Rev 2.00
February 4, 2005
The EL7584 is a 4-channel DC/DC converter IC which is
designed primarily for use in TFT-LCD applications. The
boost converter has 2V to 14V input capability and provides
5V to 17V output, which powers the column drivers and
provides up to 370mA @ 15V. A pair of charge pump control
circuits provide outputs to allow the external generation of
VON and VOFF supplies at 5V to 40V and 0V to -40V,
respectively, each at up to 60mA for VBOOST = 15V. The
VCOM buffer provides up to 50mA continuous output current
from 2V to 13V.
The EL7584 features adjustable switching frequency and on-
chip power sequence to simplify start-up operation. A
separate input is available to externally increase the default
delay of the positive charge pump. An over-temperature
feature is provided to allow the IC to be automatically
protected from excessive power dissipation.
The EL7584 is available in a 24-pin TSSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
Pinout
EL7584
(24-PIN TSSOP)
TOP VIEW
SS 1
FBB 2
EN 3
VDDB 4
LX1 5
LX2 6
VSSN 7
DRVN 8
VDDN 9
FBN 10
DP 11
INC 12
24 VSSB
23 ROSC
22 VREF
21 PGND
20 PGND
19 VSSP
18 DRVP
17 VDDP
16 FBP
15 VSSC
14 VCOM
13 VDDC
Features
• TFT-LCD display supply
- Boost regulator
- VCOM buffer
- VON charge pump
- VOFF charge pump
• 2V to 14V VIN supply
• 5V < VBOOST < 17V
• 2V < VCOM < 13V
• 5V < VON < 40V
• -40V < VOFF < 0V
• VBOOST = 15V @ 370mA
• High frequency, small inductor DC/DC boost circuit
• Over 90% efficient DC/DC boost converter capability
• Built-in power-up sequence with adjustable VON delay
• Adjustable frequency
• Adjustable soft-start
• Adjustable outputs
• Over-temperature protection
• Small parts count
• Pb-free available (RoHS compliant)
Applications
• TFT-LCD panels
• PDAs
Ordering Information
PART
NUMBER
PACKAGE TAPE & REEL PKG. DWG. #
EL7584IR
24-Pin TSSOP
-
MDP0044
EL7584IR-T7 24-Pin TSSOP
7”
MDP0044
EL7584IR-T13 24-Pin TSSOP
13”
MDP0044
EL7584IRZ
(See Note)
24-Pin TSSOP
(Pb-free)
-
MDP0044
EL7584IRZ-T7 24-Pin TSSOP
(See Note)
(Pb-free)
7”
MDP0044
EL7584IRZ- 24-Pin TSSOP
T13 (See Note) (Pb-free)
13”
MDP0044
NOTE: Intersil Pb-free 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.
FN7317 Rev 2.00
February 4, 2005
Page 1 of 16


Renesas Electronics Components Datasheet

EL7584 Datasheet

4-Channel DC/DC Converter

No Preview Available !

EL7584
Absolute Maximum Ratings (TA = 25°C)
LX Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18V
VDDB, VDDP, VDDN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18V
VDDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5V
Maximum Continuous VBOOST Output Current. . . . . . . . . . . 800mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
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. Typ values are for information purposes only. Unless otherwise noted, all tests are
at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications VIN = 3.3V, VBOOST = 12V, ROSC = 62k, TA = 25°C, Unless Otherwise Specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX UNIT
DC/DC BOOST CONVERTER
IQ1_B
Quiescent Current - Shut-down
EN = 0V
0.8 10 µA
IQ2_B
V(FBB)
Quiescent Current - Switching
Feedback Voltage
EN = VDDB
1.275
4.8
1.300
8
1.325
mA
V
VREF
VROSC
I(FBB)
Reference Voltage
Oscillator Set Voltage
Feedback Input Bias Current
1.260
1.260
1.310
1.325
0.1
1.360
1.390
V
V
µA
VDDB
Boost Converter Supply Range
DMAX
Maximum Duty Cycle
I(LX)MAX
Peak Internal FET Current
RDS-ON
Switch On Resistance
ILEAK-SWITCH Switch Leakage Current
VBOOST
Output Range
VBOOST/VIN Line Regulation
VBOOST/IO1 Load Regulation
FOSC-RANGE Frequency Range
FOSC1
Switching Frequency
VCOM BUFFER
VDDC
Supply Voltage Range
IQ1, VDDC
VDDC Disable Current
IQ2, VDDC
VDDC Enable Current
VCOM-offset
Accuracy of VCOM Output Voltage
I(INC)
VCOM Input Bias Currents
RO(VCOM)
VCOM Output Impedance
ICOM(max)
PSRR
CMRR
Output Current Limit
Supply Voltage Rejection
Common Mode Voltage Rejection
at VBOOST = 10V, I(LX) total = 350mA
I(LX) total
VBOOST > VIN + VDIODE
2.7V < VIN < 13.2V, VBOOST = 15V
50mA < IO1 < 250mA
ROSC range = 240kto 60k
ROSC = 62k
2 17 V
85 92
%
1.75 A
0.22
1 µA
5 17 V
0.1 %
0.5 %
200 1200 kHz
900 1000 1100 kHz
VDDC = 12V, EN = 0V
VDDC = 12V, VEN = VDDB, no load
2V < VCOM < (VDDC - 2V)
Current magnitude
VDDC = VBOOST = 12V, VCOM = 6V with
-100mA < ILOAD < 100mA
CLOAD for VCOM > 0.47µF, MLCC
VINC = VDDC/2, 9V < VDDC < 15V
VDDC = 12V, 2V < VINC < 10V
6 15
5.5 20
1.7 5
-10 +10
-0.1 0.01
0.1
0.25
V
µA
mA
mV
µA
150
60 102
60 93
mA
dB
dB
FN7317 Rev 2.00
February 4, 2005
Page 2 of 16


Part Number EL7584
Description 4-Channel DC/DC Converter
Maker Renesas
PDF Download

EL7584 Datasheet PDF






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