1
FN7317.2
EL7584
4-Channel DC/DC Converter
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
V
ON
and V
OFF
supplies at 5V to 40V and 0V to -40V,
respectively, each at up to 60mA for V
BOOST
= 15V. The
V
COM
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
Features
• TFT-LCD display supply
- Boost regulator
-V
COM
buffer
-V
ON
charge pump
-V
OFF
charge pump
• 2V to 14V V
IN
supply
•5V < V
BOOST
< 17V
•2V < V
COM
< 13V
•5V < V
ON
< 40V
• -40V < V
OFF
< 0V
•V
BOOST
= 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 V
ON
delay
• Adjustable frequency
• Adjustable soft-start
• Adjustable outputs
• Over-temperature protection
• Small parts count
• Pb-free available (RoHS compliant)
Applications
• TFT-LCD panels
•PDAs
SS
FBB
EN
VDDB
LX1
LX2
VSSN
DRVN
VDDN
FBN
DP
INC
VSSB
ROSC
VREF
PGND
PGND
VSSP
DRVP
VDDP
FBP
VSSC
VCOM
VDDC
1
2
3
4
16
15
14
13
5
6
7
12
11
9
8
10
20
19
18
17
24
23
22
21
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
(See Note)
24-Pin TSSOP
(Pb-free)
7” MDP0044
EL7584IRZ-
T13 (See Note)
24-Pin TSSOP
(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.
Data Sheet February 4, 2005
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
F
O
R
A
P
O
S
S
I
B
L
E
S
U
B
S
T
I
T
U
T
E
P
R
O
D
U
C
T
c
o
n
t
a
c
t
o
u
r
T
e
c
h
n
i
c
a
l
S
u
p
p
o
r
t
C
e
n
t
e
r
a
t
1
-
8
8
8
-
I
N
T
E
R
S
I
L
o
r
w
w
w
.
i
n
t
e
r
s
i
l
.
c
o
m
/
t
s
c
O
B
S
O
L
E
T
E
P
R
O
D
U
C
T
