19-5241; Rev 0; 4/10
TION KIT
EVALUA BLE
AVAILA
Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
General Description
The MAX17117 includes a high-performance step-up
regulator, a 350mA low-dropout (LDO) linear regulator,
a high-speed operational amplifier, and a high-voltage
level-shifting scan driver with gate-shading control. The
device is optimized for thin-film transistor (TFT) liquid-
crystal display (LCD) applications.
The step-up DC-DC converter provides the regulated
supply voltage for panel source-driver ICs. The high
1.2MHz switching frequency allows the use of ultra-small
inductors and ceramic capacitors. The current-mode
control architecture provides a fast-transient response to
pulsed loads typical of source driver loads. The step-up
regulator features an adjustable soft-start and an adjust-
able cycle-by-cycle current limit.
The high-current operational amplifier is designed to
drive the LCD backplane (VCOM). The amplifier features
high output current (Q200mA typ), fast slew rate (40V/Fs
typ), wide bandwidth (16MHz typ), and rail-to-rail inputs
and outputs.
The low-voltage LDO linear regulator has an integrated
0.8I pass element and can provide at least 350mA. The
output voltage is accurate within
Q1%.
The high-voltage, level-shifting scan driver with gate-
shading control is designed to drive the TFT panel gate
drivers. Its seven outputs swing 40V (maximum) between
+35V (maximum) and -15V (minimum) and can swiftly
drive capacitive loads.
The MAX17117 is available in a 32-pin, 5mm x 5mm, thin
QFN package with a maximum thickness of 0.8mm for
thin LCD panels.
V
LOGIC
S
High-Performance Operational Amplifier
MAX17117
200mA Output Short-Circuit Current
40V/µs Slew Rate
16MHz, -3dB Bandwidth
Low-Dropout Linear Regulator
High-Accuracy Output Voltage (1.0%)
+35V to -15V Outputs
40V Maximum Voltage Swing
Gate-Shading Control
S
High-Voltage Drivers with Scan Logic
S
Thermal-Overload Protection
S
32-Pin, 5mm x 5mm, Thin QFN Package
Simplified Operating Circuit
V
VGL
V
GHON
V
IN
V
MAIN
IN
LX
PGND
ENA
LDOADJ
SETUP
CONTROLLER
FB
COMP
SS
LINEAR
REGULATOR
LDOO
AGND
(EP)
MAX17117
OPAS
DTS
GATE-
SHADING
TIMING
CONTROL
OP
OUT
TO VCOM
BACKPLANE
POS
V
GHON
GHON
ST
STH
Ordering Information
PART
MAX17117ETJ+
TEMP RANGE
-40NC to +85NC
PIN-PACKAGE
32 TQFN-EP*
SYSTEM
CK1
CKH1
CK3
CKH3
CK5
S1
S3
S5
SCAN DRIVER AND
GATE-SHADING
CONTROL LOGIC
CK2
CKH5
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
Applications
Notebook Computer Displays
RO
CKH2
PANEL
CK4
CKH4
Features
S
2.3V to 5.5V IN Supply-Voltage Range
S
1.2MHz Current-Mode Step-Up Regulator
CK6
S2
S4
S6
CKH6
Fast-Transient Response
High-Accuracy Reference (1%)
Integrated 16V, 2A, 200mI MOSFET
High Efficiency (> 85%)
Adjustable Cycle-by-Cycle Current Limit
RE
VGLC
V
VGL
VGL
_______________________________________________________________
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.
Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
MAX17117
ABSOLUTE MAXIMUM RATINGS
IN, ENA, FB, COMP, SS, DTS, LDOADJ, ST,
CK1–CK6, LDOO to AGND...............................-0.3V to +7.5V
PGND to AGND ....................................................-0.3V to +0.3V
LX, OPAS to PGND ...............................................-0.3V to +18V
GHON to PGND ....................................................-0.3V to +45V
VGL to PGND ....................................................... -20V to +0.3V
GHON to VGL.................................................................... +45V
STH, CKH1–CKH6, VGLC, RO,
RE to VGL .........................................-0.3V to (V
GHON
+ 0.3V)
OUT, POS to PGND ..............................-0.3V to (V
OPAS
+ 0.3V)
GHON and VGL RMS Current Rating ..................................0.8A
VGLC, STH, and CKH1–CKH6 RMS Current Rating ...........0.8A
LX, PGND RMS Current Rating ............................................1.6A
Continuous Power Dissipation (T
A
= +70NC)
32-Pin TQFN (derate 24.9mW/NC above +70NC) .......1990mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +160NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
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
(V
IN
= +3V, Circuit of Figure 1, V
OPAS
= +8.5V, V
GHON
= +24V, V
VGL
= -6.2V, V
ST
= V
CK
_ = 0V,
T
A
= 0NC to +85NC,
unless otherwise
noted. Typical values are at T
A
= +25NC.)
PARAMETER
IN Input Voltage Range
IN Undervoltage-Lockout
Threshold
IN Quiescent Current
IN Standby Current
GHON Standby Current
OPAS Standby Current
Thermal Shutdown
STEP-UP REGULATOR
Output Voltage Range
OPAS Overvoltage Threshold
Operating Frequency
Oscillator Maximum Duty Cycle
FB Regulation Voltage
FB Fault-Trip Level
Fault-Trigger Delay
FB Load Regulation
FB Line Regulation
FB Input-Bias Current
FB Transconductance
LX Current Limit
LX On-Resistance
LX Input-Bias Current
Current-Sense Transresistance
Soft-Start Pullup Current
0 < I
LOAD
< full load
V
IN
= 2.5V to 5.5V, T
A
= +25NC
V
FB
= 1.24V, T
A
= +25NC
DI
COMP
=
Q2.5FA,
FB = COMP
R
ENA
= 10kW, duty cycle = 60%
I
LX
= 1A
V
LX
= 13.5V, T
A
= +25NC
0.10
2
75
1.6
No load
Falling edge
OPAS rising
V
IN
16.5
1000
91
1.227
1.05
17
1200
94
1.240
1.10
160
-0.2
0.1
65
160
2
200
10
0.20
4
0.25
200
280
2.4
500
20
0.30
6
15
18
1400
97
1.252
1.15
V
V
kHz
%
V
V
ms
%
%/V
nA
FS
A
mI
FA
V/A
FA
V
IN
rising, typical hysteresis = 150mV
V
FB
= 1.3V, LX not switching
V
FB
= 1.2V, LX switching
V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V
V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V
V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V
Temperature rising
145
CONDITIONS
MIN
2.3
1.80
2.00
1.0
2.5
0.7
100
20
170
TYP
MAX
5.5
2.20
2.5
5
2
200
50
UNITS
V
V
mA
mA
FA
FA
NC
2
______________________________________________________________________________________
Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +3V, Circuit of Figure 1, V
OPAS
= +8.5V, V
GHON
= +24V, V
VGL
= -6.2V, V
ST
= V
CK
_ = 0V,
T
A
= 0NC to +85NC,
unless otherwise
noted. Typical values are at T
A
= +25NC.)
PARAMETER
VCOM BUFFER
OPAS Voltage Range
OPAS Supply Current
OUT Voltage Swing High
OUT Voltage Swing Low
OUT Short-Circuit Current
POS Input-Bias Current
POS Input-Offset Voltage
Gain-Bandwidth Product
-3dB Bandwidth
Slew Rate
HIGH-VOLTAGE SCAN DRIVER
GHON Voltage Range
VGL Voltage Range
GHON-to-VGL Voltage Range
GHON Supply Current
VGL Supply Current
Output Impedance Low
Output Impedance High
Gate-Shading Switch Resistance
RO, RE Resistance Range
Propagation Delay from ST
Rising Edge to STH Rising Edge
C
LOAD
= 100pF, R
LOAD
= 0I
V
GHON
- V
VGL
CK1 through CK6 and ST low
CK1 through CK6 and ST low
STH, CKH_, VGLC, I
OUT
= -20mA
STH, CKH_, VGLC, I
OUT
= +20mA
CKH1, CKH3, CKH5, I
RE
= 10mA
CKH2, CKH4, CKH6, I
RO
= 10mA
100
100
100
200
200
-500
350
-300
80
80
100
100
12
-15
35
-3
40
550
V
V
V
FA
FA
I
I
I
I
ns
ns
R
LOAD
= 10kI, C
LOAD
= 10pF
5V pulse applied to POS, OUT measured from 10% to
90%
10
V
POS
= V
OPAS
/2, no load
I
OUT
= 5mA
I
OUT
= 5mA
Sourcing, short to V
OPAS
/2 - 1V
Sinking, short to V
OPAS
/2 + 1V
V
POS
= V
OPAS
/2, T
A
= +25NC
V
OUT
= V
OPAS
/2
100
100
-50
-15
8
16
40
V
OPAS
- 100
5
0.8
V
OPAS
- 50
50
200
200
+50
+15
100
15
1.2
V
mA
mV
mV
mA
nA
mV
MHz
MHz
V/Fs
CONDITIONS
MIN
TYP
MAX
UNITS
MAX17117
Propagation Delay from ST
C
LOAD
= 100pF, R
LOAD
= 0I
Falling Edge to STH Falling Edge
Propagation Delay from CK_
Rising Edge to CKH_ Rising
Edge
Propagation Delay from CK_
Falling Edge to CKH_ Falling
Edge
STH, VGLC, CKH_ Rise Time
STH, VGLC, CKH_ Fall Time
C
LOAD
= 100pF, R
LOAD
= 0I
100
200
ns
C
LOAD
= 100pF, R
LOAD
= 0I
C
LOAD
= 5nF, R
LOAD
= 0I; V
GHON
= 30V,
V
VGL
= -10V; measured from 10% to 90%
C
LOAD
= 5nF, R
LOAD
= 0I; V
GHON
= 30V,
V
VGL
= -10V; measured from 10% to 90%
100
200
ns
0.5
0.5
1
1
100
Fs
Fs
kHz
STH, CKH_ Operating Frequency
C
LOAD
= 5nF, R
LOAD
= 0I
Range
_______________________________________________________________________________________
3
Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
MAX17117
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +3V, Circuit of Figure 1, V
OPAS
= +8.5V, V
GHON
= +24V, V
VGL
= -6.2V, V
ST
= V
CK
_ = 0V,
T
A
= 0NC to +85NC,
unless otherwise
noted. Typical values are at T
A
= +25NC.)
PARAMETER
GATE-SHADING TIMING CONTROL
Gate-Shading Detection
Threshold
Gate-Shading Detection Current
DTS Switch Resistance
DTS Rising Edge Threshold
DTS Falling Edge Threshold
LDO
LDOO Output Voltage Range
Dropout Voltage
LDOO Line Regulation
LDOO Load Regulation
LDOO Current Limit
LDOADJ Feedback Voltage
LDOADJ Input-Bias Current
DIGITAL INPUTS
ST, CK_ Input High Level
ST, CK_ Input Low Level
1.8V < V
LDOO
< 5.5V
1.8V < V
LDOO
< 5.5V
1.8V < V
LDOO
< 3.0V
V
LDOO
> 3.0V
ENA Input Logic-Low Level
ENA Resistor Range
1.8V < V
LDOO
< 3.0V
V
LDOO
> 3.0V
0
0.7 x
V
LDOO
2.1
0.3 x
V
LDOO
0.8
200
0.7 x
V
LDOO
0.3 x
V
LDOO
V
V
V
V
V
V
kI
V
LDOADJ
= 1.3V, T
A
= +25NC
V
IN
= 3.3V, V
LDOADJ
= 1.1V, I
LDOO
= 350mA
V
IN
= 2.8V to 5.5V, V
LDOO
= 2.5V, I
LDOO
= 100mA
V
LDOO
= 2.5V, I
LDOO
= 1mA to 300mA
V
LDOADJ
= 1.0V
0.4
1.227
1.8
300
0.1
0.2
0.62
1.240
100
V
IN
500
0.3
0.5
0.8
1.252
200
V
mV
%/V
%/V
A
V
nA
DTS falling
V
DTS
= 0.5V
V
DTS
= 1.3V, I
DTS
= 1mA
1.215
5
100
10
10
1.240
100
150
15
50
1.265
150
mV
µA
I
V
mV
CONDITIONS
MIN
TYP
MAX
UNITS
ENA Input Logic-High Level
ELECTRICAL CHARACTERISTICS
(V
IN
= +3V, Circuit of Figure 1, V
OPAS
= +8.5V, V
GHON
= +24V, V
VGL
= -6.2V, V
ST
= V
CK_
= 0V,
T
A
= -40NC to +85NC,
unless oth-
erwise noted.)
PARAMETER
IN Input Voltage Range
IN Undervoltage-Lockout
Threshold
IN Quiescent Current
IN Standby Current
GHON Standby Current
OPAS Standby Current
Thermal Shutdown
4
V
IN
rising, typical hysteresis = 150mV
V
FB
= 1.3V, LX not switching
V
FB
= 1.2V, LX switching
V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V
V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V
V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V
Temperature rising
145
CONDITIONS
MIN
2.3
1.80
TYP
MAX
5.5
2.20
2.5
5
2
160
50
UNITS
V
V
mA
mA
FA
FA
NC
______________________________________________________________________________________
Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +3V, Circuit of Figure 1, V
OPAS
= +8.5V, V
GHON
= +24V, V
VGL
= -6.2V, V
ST
= V
CK_
= 0V,
T
A
= -40NC to +85NC,
unless oth-
erwise noted.)
PARAMETER
STEP-UP REGULATOR
Output Voltage Range
OPAS Overvoltage Threshold
Operating Frequency
Oscillator Maximum Duty Cycle
FB Regulation Voltage
FB Fault-Trip Level
FB Line Regulation
FB Input-Bias Current
FB Transconductance
LX Current Limit
LX On-Resistance
LX Input-Bias Current
Current-Sense Transresistance
Soft-Start Pullup Current
VCOM BUFFER
OPAS Voltage Range
OPAS Supply Current
OUT Voltage Swing High
OUT Voltage Swing Low
OUT Short-Circuit Current
POS Input-Bias Current
POS Input-Offset Voltage
Slew Rate
HIGH-VOLTAGE SCAN DRIVER
GHON Voltage Range
VGL Voltage Range
GHON-to-VGL Voltage Range
GHON Supply Current
VGL Supply Current
Output Impedance Low
Output Impedance High
Gate-Shading Switch Resistance
RO, RE Resistance Range
Propagation Delay from ST
Rising Edge to STH Rising Edge
C
LOAD
= 100pF, R
LOAD
= 0I
V
GHON
- V
VGL
CK1 through CK6 and ST low
CK1 through CK6 and ST low
STH, CKH_, VGLC, I
OUT
= -20mA
STH, CKH_, VGLC, I
OUT
= +20mA
CKH1, CKH3, CKH5, I
RE
= 10mA
CKH2, CKH4, CKH6, I
RO
= 10mA
100
200
-500
80
80
100
100
12
-15
35
-3
40
550
V
V
V
FA
FA
I
I
I
I
ns
V
POS
= V
OPAS
/2, no load
I
OUT
= 5mA
I
OUT
= 5mA
Sourcing, short to V
OPAS
/2 - 1V
Sinking, short to V
OPAS
/2 + 1V
V
POS
= V
OPAS
/2, T
A
= +25NC
V
OUT
= V
OPAS
/2
5V pulse applied to POS, OUT measured from 10% to
90%
100
100
-50
-15
10
+50
+15
V
OPAS
- 100
100
5
15
1.2
V
mA
mV
mV
mA
nA
mV
V/Fs
No load
Falling edge
V
IN
= 2.5V to 5.5V, T
A
= +25NC
V
FB
= 1.3V, T
A
= +25NC
DI
COMP
=
Q2.5FA,
FB = COMP
V
FB
= 1.2V, duty cycle = 60%
I
LX
= 1A
V
LX
= 13.5V, T
A
= +25NC
0.10
2
75
1.6
OPAS rising
V
IN
16.5
1000
91
1.227
1.05
15
18
1400
97
1.252
1.15
0.3
200
280
2.4
500
20
0.30
6
V
V
kHz
%
V
V
%/V
nA
FS
A
mI
FA
V/A
FA
CONDITIONS
MIN
TYP
MAX
UNITS
MAX17117
_______________________________________________________________________________________
5
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