19-2812; Rev 1; 3/10
KIT
ATION
EVALU
BLE
AVAILA
4-Level or 2-Level Logic to High-Voltage
Level Shifter for TFT LCD TV Display
General Description
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.
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.
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.
The MAX17079 is in a 40-pin, 6mm x 6mm, thin QFN
package, with exposed pad and a maximum height of
0.8mm.
Features
♦
7-Channel Logic-Level Input to High-Voltage
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
♦
5-Level Output
♦
Short Propagation Delay (80ns typ)
♦
Fast Rise Time (30ns typ)
♦
Built-In Dead Time to Prevent Shoot-Through
♦
Thermal Shutdown
♦
VLS and VCC Undervoltage Lockout
MAX17079
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX17079GTL+ -40°C to +105°C
40 TQFN-EP*
T4066+5
(6mm x 6mm)
*EP
= Exposed paddle.
Simplified Operating Circuit
3.3V
10V
7V
6V
5V
2V
15V
Applications
TFT LCD TV Panels
VCC
VH1
VH2
VCOM
VL2
VL1
VLS
OA1
Pin Configuration
A1
OB1
OA2
OB2
OA2
OB2
OA3
OB3
OA4
OB4
OA5
OB5
OA6
TOP VIEW
OB6
B1
A2
30 29 28 27 26 25 24 23 22 21
OB1 31
OA1 32
ST 33
VH1 34
VH2 35
VLS 36
AGND 37
VCC 38
EN 39
CH 40
1
A1
2
B1
3
A2
4
B2
5
A3
6
B3
7
A4
8
B4
9
A5
10
B5
EP
20 OA7
19 OB7
18 VCOM
17 VL1
16 VL2
SYSTEM
B2
A3
B3
A4
OA3
OB3
OA4
OB4
PANEL
MAX17079
B4
A5
MAX17079
15 DGND
14 B7
13 A7
12 B6
11 A6
B5
A6
B6
OA5
OB5
OA6
OB6
A7
B7
OA7
OB7
EP = EXPOSED PAD
THIN QFN
(6mm x 6mm)
AGND
EN
DGND CH
ST
________________________________________________________________
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.
4-Level or 2-Level Logic to High-Voltage
Level Shifter for TFT LCD TV Display
MAX17079
ABSOLUTE MAXIMUM RATINGS
VCC to AGND...........................................................-0.3V to +7V
Ax, Bx, CH, ST, EN to AGND....................................-0.3V to +7V
DGND to AGND.....................................................-0.3V to +0.3V
VLS to DGND..........................................................-0.3V to +20V
VH1, VH2, VL1, VL2, VCOM to DGND ........-0.3V to (V
LS
+ 0.3V)
OAx, OBx to DGND ..........................(V
L1
- 0.3V) to (V
H1
+ 0.3V)
OBx, OAx RMS Current.......................................................50mA
VH1, VH2, VL1, VL2 RMS Current.....................................300mA
VH2, VL2, VCOM, to DGND.............(VL1 - 0.3V) to (VH1 + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
40-Pin, 6mm x 6mm TQFN
(derate 35.7mW/°C above +70°C) .........................2857.1mW
Operating Temperature Range .........................-40°C to +105°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature (soldering, 10s) ..........................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
VCC
= 3.3V, V
VLS
= 15V, V
VH1
= 10V, V
VH2
= 7V, V
VCOM
= 6V, V
VL2
= 5V, V
VL1
= 2V, T
A
= -40°C to +105°C.
Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
GENERAL
VCC Input Voltage Range
VCC Input Undervoltage Lockout Rising edge, 200mV typical hysteresis
VLS Input Voltage Range
VLS Input Undervoltage Lockout
VH1 Input Voltage Range
VH2 Input Voltage Range
VL2 Input Voltage Range
VL1 Input Voltage Range
VCOM Input Voltage Range
VCC Quiescent Current
VLS Quiescent Current
VH1 Quiescent Current
VH2 Quiescent Current
VL1 Quiescent Current
VL2 Quiescent Current
INPUTS AND OUTPUTS
Logic-Input Low Voltage
Logic-Input High Voltage
Logic-Low Input Current
Logic-High Input Current
VH1 - OAx, VH1 - OBx
On-Resistance
VH2 - OAx, VH2 - OBx
On-Resistance
EN, CH, ST, Ax, Bx
EN, CH, ST, Ax, Bx
EN, CH, ST, Ax, Bx to AGND
VCC to EN, CH, ST, Ax, Bx
V
VLS
= 10V, V
VH1
= 5V,
I
(OAx, OBx)
= 20mA
V
VLS
= 10V, V
VH2
= 5V,
I
(OAx, OBx)
= 20mA
0.7 x
V
VCC
-1
10.0
16.5
3
3
+1
30.0
0.3 x
V
VCC
V
V
μA
μA
All channels in STATE 2
All channels in STATE 1 or STATE 3
All channels in STATE 2 or STATE 4
All channels in STATE 1 or STATE 3
All channels in STATE 2 or STATE 4
Rising edge, 500mV typical hysteresis
2.3
1.8
10
8.0
4
0
0
0
4
50
300
150
-125
-90
-130
8.5
2.0
3.6
2.2
18
9.0
V
VLS
V
VLS
- 4
V
VLS
- 4
V
VLS
- 4
V
VLS
- 4
V
V
V
V
V
V
V
V
V
μA
μA
μA
μA
μA
μA
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
4-Level or 2-Level Logic to High-Voltage
Level Shifter for TFT LCD TV Display
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
VCC
= 3.3V, V
VLS
= 15V, V
VH1
= 10V, V
VH2
= 7V, V
VCOM
= 6V, V
VL2
= 5V, V
VL1
= 2V, T
A
= -40°C to +105°C.
Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
VL1 - OAx, VL1 - OBx
On-Resistance
VL2 - OAx, VL2 - OBx
On-Resistance
CONDITIONS
V
VLS
= 10V, V
VL1
= 5V,
I
(OAx, OBx)
= 20mA
V
VLS
= 10V, V
VL2
= 5V,
I
(OAx, OBx)
= 20mA
V
VLS
= 10V, V
VH2
= 6V, V
VL2
= 4V, I
(OAx, OBx)
= 20mA
(VH2 to OAx) - (VL2 to OAx), (VH2 to OBx) - (VL2 to OBx)
On-Resistance Difference
V
VLS
= 10V, V
VH1
= 6V, V
VL1
= 4V, I
(OAx, OBx)
= 20mA
(VH1 to OAx) - (VL1 to OAx), (VH1 to OBx) - (VL1 to OBx)
VCOM - OAx, VCOM - OBx
On-Resistance
TIMING
Input Pulse Width
EN Setup Time
EN Falling Delay
Output Delay Time
Output Rise Time
Output Fall Time
Input Pulse Width
t
HH
, t
HL
, t
LH
, t
LL
, refers to the minimum duration of input
for a given state
t
ES
t
ER
t
D
, no load, input to 10% output
t
R
, no load, rails of 0V and 18V, measured from 2V to 16V
t
F
, no load, rails of 0V and 18V, measured from 16V to 2V
t
PW
, no load, refers to the minimum high or low time of
Ax or Bx
500
500
-50
70
80
30
30
+100
200
200
100
100
ns
ns
ns
ns
ns
ns
ns
V
VLS
= 10V, V
VCOM
= 5V,
I
(OAx, OBx)
= 20mA
-1.5
0
15
+1.5
-0.5
MIN
TYP
3
3
0
+0.5
MAX
UNITS
MAX17079
Note 1:
T
A
= -40°C specifications are guaranteed by design, not production tested. Production test is done at T
A
= +25°C and
T
A
= +85°C.
Timing Diagram
t
ES
Ax
t
PW
Ax
Bx
t
D
t
D
Bx
OAx
t
F
OBx
OAx
t
R
t
ER
t
HH
t
HL
EN
t
LH
t
LL
_______________________________________________________________________________________
3
4-Level or 2-Level Logic to High-Voltage
Level Shifter for TFT LCD TV Display
MAX17079
Typical Operating Characteristics
(Circuit of Figure 1. V
IN
= 12V
,
T
A
= +25°C, unless otherwise noted.)
ENABLE PROPAGATION DELAY
MAX17079 toc01
PROPAGATION DELAY
(STATE 1 - STATE 2)
MAX17079 toc02
PROPAGATION DELAY
(STATE 2 - STATE 3)
MAX17079 toc03
OB2
EN
OB2
OA2
OA2
OA2
OB2
B2
B2
A2
A2
40ns/div
EN: 2V/div
OA2: 5V/div
OB2: 5V/div
OB2: 5V/div
OA2: 5V/div
20ns/div
B2: 5V/div
A2: 5V/div
OB2: 5V/div
OA2: 5V/div
20ns/div
B2: 5V/div
A2: 5V/div
PROPAGATION DELAY
(STATE 3 - STATE 4)
MAX17079 toc04
PROPAGATION DELAY
(STATE 4 - STATE 1)
MAX17079 toc05
VCOM SWITCH OUTPUT RESISTANCE
STATE 0
V
VCOM
= 6V
0.8
V
VCOM
- V
OA2
(V)
MAX17079 toc06
1.0
OB2
OB2
OA2
OA2
0.6
B2
0.4
B2
A2
0.2
A2
0
20ns/div
OB2: 5V/div
OA2: 5V/div
B2: 5V/div
A2: 5V/div
OB2: 5V/div
OA2: 5V/div
20ns/div
B2: 5V/div
A2: 5V/div
0
10
20
30
40
50
60
70
I
OA2
(mA)
VH2 SWITCH OUTPUT RESISTANCE
MAX17079 toc07
VH1 SWITCH OUTPUT RESISTANCE
MAX17079 toc08
VL1 SWITCH OUTPUT RESISTANCE
STATE 3
V
VL1
= 2V
120
V
OA2
- V
VL1
(mV)
MAX17079 toc09
150
STATE 2
V
VH2
= 7V
120
V
VH2
- V
OA2
(mV)
150
STATE 1
V
VH1
= 10V
120
V
VH1
- V
OA2
(mV)
150
90
90
90
60
60
60
30
30
0
0
10
20
30
40
50
0
10
20
30
40
50
I
OA2
(mA)
I
OA2
(mA)
30
0
0
10
20
30
40
50
I
OA2
(mA)
0
4
_______________________________________________________________________________________
4-Level or 2-Level Logic to High-Voltage
Level Shifter for TFT LCD TV Display
MAX17079
Typical Operating Characteristics (continued)
(Circuit of Figure 1. V
IN
= 12V
,
T
A
= +25°C, unless otherwise noted.)
VL2 SWITCH OUTPUT RESISTANCE
STATE 4
V
VL2
= 5V
120
V
OA2
- V
VL2
(mV)
MAX17079 toc10
4-LEVEL SEQUENTIAL STARTUP
MAX17079 toc11
4-LEVEL COMBINATIONAL STARTUP
MAX17079 toc12
150
OA2
OA2
90
EN
60
A2
A2
30
B2
B2
0
0
10
20
30
40
50
OA2: 5V/div
A2: 5V/div
40μs/div
B2: 5V/div
EN: 2V/div
OA2: 5V/div
A2: 5V/div
40μs/div
B2: 5V/div
EN: 2V/div
I
OA2
(mA)
EN
4-LEVEL SEQUENTIAL OPERATION
MAX17079 toc13
2-LEVEL SEQUENTIAL STARTUP
MAX17079 toc14
2-LEVEL COMBINATIONAL STARTUP
MAX17079 toc15
OB2
EN
OA2
OA2
OB2
OB2
EN
OA2
B2
A2
A2
40μs/div
OB2: 5V/div
OA2: 5V/div
B2: 5V/div
A2: 5V/div
OA2: 5V/div
OB2: 5V/div
40μs/div
A2: 5V/div
EN: 5V/div
OA2: 5V/div
OB2: 5V/div
40μs/div
A2: 5V/div
EN: 5V/div
A2
VCC QUIESCENT CURRENT
vs. TEMPERATURE
MAX17079 toc16
VLS QUIESCENT CURRENT
vs. TEMPERATURE
MAX17079 toc17
50
STATE 1
48
0.40
0.35
0.30
STATE 2
I
VCC
(μA)
I
VLS
(mA)
46
0.25
0.20
STATE 1
44
42
0.15
0.10
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
40
_______________________________________________________________________________________
5
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