19-2812; Rev 1; 3/10
4-Level or 2-Level Logic to High-Voltage
Level Shifter for TFT LCD TV Display
MAX1079
General Description
Features
♦ 7-Channel Logic-Level Input to High-Voltage
The MAX17079 is a 7-channel logic-level input to high-
voltage output level shifter. Each channel has two
inputs plus a shared enable input. Each channel has
two outputs, which can be set to five output levels. Two
outputs are complementary to each other. The five out-
put levels are set by five supply rails that are common
to all 14 outputs.
Output Level Shifter
♦ Complementary Outputs in Each Channel
♦ VLS Input Range from 10V to 18V
♦ VCC Input Range from 2.3V to 3.6V
♦ 2-Level or 4-Level Operation
♦ Sequential or Combinational Logic
♦ 3Ω Output Switches
The five supply rails include a typical TFT VCOM rail.
Two upper rails are always greater than VCOM, with
VH1 always greater than VH2. The two lower rails are
always less than VCOM, with VL1 always less than VL2.
Other supply rails are VLS (the typical TFT AVDD sup-
ply) and VCC (the logic supply). The MAX17079 can
also be configured as a two-level voltage shifter.
♦ 5-Level Output
♦ Short Propagation Delay (80ns typ)
♦ Fast Rise Time (30ns typ)
♦ Built-In Dead Time to Prevent Shoot-Through
♦ Thermal Shutdown
When EN is low, all 14 outputs connect to VCOM, and
when EN is high, the outputs are determined by their
inputs. The logic inputs are driven by the timing con-
troller. The output switches are typically 3Ω with low
propagation delays and fast rise times. The MAX17079
has a minimum dead time to prevent shoot-through cur-
rents between supplies. The MAX17079 has thermal
shutdown to protect against overheating, VCC under-
voltage lockout (UVLO), and VLS UVLO.
♦ VLS and VCC Undervoltage Lockout
Ordering Information
PIN-
PKG
PART
TEMP RANGE
PACKAGE
CODE
40 TQFN-EP*
(6mm x 6mm)
MAX17079GTL+ -40°C to +105°C
T4066+5
*EP = Exposed paddle.
The MAX17079 is in a 40-pin, 6mm x 6mm, thin QFN
package, with exposed pad and a maximum height of
0.8mm.
Simplified Operating Circuit
3.3V
10V
7V
6V
5V
2V
15V
Applications
VCC VH1
VH2 VCOM VL2
VL1
VLS
TFT LCD TV Panels
OA1
Pin Configuration
OB1
OA2
OB2
OA3
A1
TOP VIEW
B1
A2
30 29 28 27 26 25 24 23 22 21
20
31
32
33
OA7
OB1
OA1
ST
B2
A3
19 OB7
18 VCOM
17 VL1
OB3
EP
B3
A4
OA4
OB4
PANEL
SYSTEM
VH1 34
16
VL2
15 DGND
14
35
36
37
38
39
40
VH2
VLS
AGND
VCC
EN
MAX17079
B4
A5
MAX17079
OA5
OB5
B7
13 A7
12
B5
A6
B6
OA6
OB6
OA7
B6
11 A6
CH
A7
B7
1
2
3
4
5
6
7
8
9
10
OB7
AGND
EN
DGND
CH ST
THIN QFN
(6mm x 6mm)
EP = EXPOSED PAD
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.