EL7583 Datasheet, PDF (1/15 Pages) Intersil Corporation – 3-Channel DC-DC Converter

®
Data Sheet
February 4, 2005
EL7583
FN7335.3
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 V_ON and V_OFF 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 V_ON 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 20-pin TSSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
Ordering Information
PART
NUMBER
PACKAGE
TAPE &
REEL PKG. DWG. #
EL7583IR
20-Pin TSSOP
-
MDP0044
EL7583IR-T7
20-Pin TSSOP
7”
MDP0044
EL7583IR-T13
20-Pin TSSOP
13”
MDP0044
EL7583IRZ
(See Note)
20-Pin TSSOP
-
(Pb-free)
MDP0044
EL7583IRZ-T7
20-Pin TSSOP
7”
(See Note)
(Pb-free)
MDP0044
EL7583IRZ-T13 20-Pin TSSOP
13”
(See Note)
(Pb-free)
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.
Features
• TFT-LCD display supply
- Boost regulator
- V_ON charge pump
- V_OFF charge pump
• 2.7V to 14V V_IN supply
• 5V < V_BOOST < 17V
• 5V < V_ON < 40V
• -40V < V_OFF < 0V
• V_BOOST = 12V @ 470mA
• V_BOOST = 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 available (RoHS compliant)
Applications
• TFT-LCD panels
• PDAs
Pinout
EL7583
(20-PIN TSSOP)
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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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