EL7583
®
Data Sheet
February 4, 2005
FN7335.3
3-Channel DC/DC Converter
Features
• TFT-LCD display supply
- Boost regulator
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
- V
- V
charge pump
ON
charge pump
OFF
• 2.7V to 14V V supply
IN
provide regulated outputs of V
and V supplies at 8V
• 5V < V
• 5V < V
< 17V
ON
OFF
BOOST
to 40V and -5V to -40V, respectively, each at up to 60mA.
< 40V
ON
The EL7583 features adjustable switching frequency,
adjustable soft start, and a separate output V
ON
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.
• -40V < V
< 0V
OFF
enable
• V
= 12V @ 470mA
= 15V @ 370mA
BOOST
• V
BOOST
• High frequency, small inductor DC/DC boost circuit
• Over 90% efficient DC/DC boost converter capability
• Adjustable frequency
The EL7583 is available in a 20-pin TSSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
• Adjustable soft-start
Ordering Information
• Adjustable outputs
PART
TAPE &
REEL
NUMBER
PACKAGE
PKG. DWG. #
MDP0044
MDP0044
MDP0044
MDP0044
• Small parts count
EL7583IR
20-Pin TSSOP
20-Pin TSSOP
20-Pin TSSOP
-
7”
13”
-
• Pb-free available (RoHS compliant)
EL7583IR-T7
EL7583IR-T13
Applications
• TFT-LCD panels
• PDAs
EL7583IRZ
(See Note)
20-Pin TSSOP
(Pb-free)
EL7583IRZ-T7
(See Note)
20-Pin TSSOP
(Pb-free)
7”
MDP0044
MDP0044
Pinout
EL7583
(20-PIN TSSOP)
TOP VIEW
EL7583IRZ-T13
(See Note)
20-Pin TSSOP
(Pb-free)
13”
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.
1
2
20
19
18
17
16
15
14
13
12
11
VSSB
SS
ROSC
ENP
3
FBB
VDDB
LX
ENBN
VREF
PGND
PGND
DRVP
VDDP
FBP
4
5
6
LX
7
LX
8
DRVN
VDDN
FBN
9
10
VSSP
REFER TO PCB LAYOUT GUIDELINE
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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