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Renesas Electronics Components Datasheet

EL7583 Datasheet

3-Channel DC/DC Converter

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EL7583
3-Channel DC/DC Converter
3-Channel DC/DC Converter
The EL7583 is a 3-channel DC/DC converter IC which is
designed primarily for use in TFT-LCD applications. It
features a PWM boost converter with 2.7V to 14V input
capability and 5V to 17V output, which powers the column
drivers and provides up to 470mA @ 12V, 370mA @ 15V
from 5V supply. A pair of charge pump control circuits
provide regulated outputs of VON and VOFF supplies at 8V
to 40V and -5V to -40V, respectively, each at up to 60mA.
The EL7583 features adjustable switching frequency,
adjustable soft start, and a separate output VON enable
control to allow selection of supply start-up sequence. An
over-temperature feature is provided to allow the IC to be
automatically protected from excessive power dissipation.
The EL7583 is available in a standard 20 Ld TSSOP
package and the Pb-free 20 Ld HTSSOP package. Both are
specified for operation over the full -40°C to +85°C
temperature range.
Ordering Information
PART
NUMBER
PART TAPE &
MARKING REEL PACKAGE
PKG.
DWG. #
EL7583IR
7583IR
- 20 Ld TSSOP MDP0044
EL7583IR-T7 7583IR
7” 20 Ld TSSOP MDP0044
EL7583IR-T13 7583IR
13” 20 Ld TSSOP MDP0044
EL7583IREZ
(See Note)
7583IREZ
- 20 Ld HTSSOP MDP0048
(Pb-free)
EL7583IREZ-T7 7583IREZ
(See Note)
7” 20 Ld HTSSOP MDP0048
(Pb-free)
EL7583IREZ-T13 7583IREZ
(See Note)
13” 20 Ld HTSSOP MDP0048
(Pb-free)
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.
FN7335 Rev 5.00
May 12, 2006
DATASHEET
FN7335
Rev 5.00
May 12, 2006
Features
• TFT-LCD display supply
- Boost regulator
- VON charge pump
- VOFF charge pump
• 2.7V to 14V VIN supply
• 5V < VBOOST < 17V
• 5V < VON < 40V
• -40V < VOFF < 0V
• VBOOST = 12V @ 470mA
• VBOOST = 15V @ 370mA
• High frequency, small inductor DC/DC boost circuit
• Over 90% efficient DC/DC boost converter capability
• Adjustable frequency
• Adjustable soft-start
• Adjustable outputs
• Small parts count
• Pb-free plus anneal available (RoHS compliant)
Applications
• TFT-LCD panels
• PDAs
Pinout
EL7583
(20 LD TSSOP/HTSSOP)
TOP VIEW
VSSB 1
SS 2
FBB 3
VDDB 4
LX 5
LX 6
LX 7
DRVN 8
VDDN 9
FBN 10
20 ROSC
19 ENP
18 ENBN
17 VREF
16 PGND
15 PGND
14 DRVP
13 VDDP
12 FBP
11 VSSP
REFER TO PCB LAYOUT GUIDELINE
Page 1 of 16


Renesas Electronics Components Datasheet

EL7583 Datasheet

3-Channel DC/DC Converter

No Preview Available !

EL7583
Absolute Maximum Ratings (TA = 25°C)
VIN Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14V
VDDB, VDDP, VDDN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18V
LX Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18V
Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . . . 0.5A
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Die Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85°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. 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 = 100k, TA = 25°C Unless Otherwise Specified
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX UNIT
DC/DC BOOST CONVERTER
IQ1_B
Quiescent Current - Shut-down
ENBN = ENP = 0V
0.8 10 µA
IQ2_B
V(FBB)
Quiescent Current - Switching
Feedback Voltage
ENBN = 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
2.7 17 V
DMAX
Maximum Duty Cycle
85 92
%
I(LX)MAX
Peak Internal FET Current
1.75 A
RDS-ON
Switch On Resistance
at VBOOST = 10V, I(LX) total = 350mA
0.22
ILEAK-SWITCH Switch Leakage Current
I(LX) total
1 µA
VBOOST
Output Range
VBOOST > VIN + VDIODE
5 17 V
VBOOST/VIN Line Regulation
2.7V < VIN < 13.2V, VBOOST = 15V
0.1 %
VBOOST/IO1 Load Regulation
50mA < IO1 < 250mA
0.5 %
FOSC-RANGE Frequency Range
ROSC range = 240kto 60k
200 1000 kHz
FOSC1
Switching Frequency
ROSC = 100k
620 680 750 kHz
POSITIVE REGULATED CHARGE PUMP (VON)
Most positive VON output depends on the magnitude of the VDDP input voltage (normally connected to VBOOST) and the external component
configuration (doubler or tripler)
VDDP
IQ1(VDDP)
IQ2(VDDP)
V(FBP)
Supply Input for Positive Charge Pump
Quiescent Current - Shut-down
Quiescent Current - Switching
Feedback Reference Voltage
Usually connected to VBOOST output
ENP = 0V
ENBN = ENP = VDDB
5
1.245
11.5
2.3
1.310
17
20
5
1.375
V
µA
mA
V
I(FBP)
Feedback Input Bias Current
0.1 µA
I(DRVP)
ILR_VON
FPUMP
RMS DRVP Output Current
Load Regulation
Charge Pump Frequency
VDDP = 12V
VDDP = 6V
5mA < IL < 15mA
Frequency set by ROSC - see boost section
60
15
-0.5 0.03 0.5
0.5*FOSC
mA
mA
%/mA
FN7335 Rev 5.00
May 12, 2006
Page 2 of 16


Part Number EL7583
Description 3-Channel DC/DC Converter
Maker Renesas
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EL7583 Datasheet PDF






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