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PDF MAX17117 Data sheet ( Hoja de datos )
| Número de pieza | MAX17117 | |
| Descripción | Internal-Switch Boost Regulator | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX17117 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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19-5241; Rev 0; 4/10
EVAALVUAAILTAIOBNLEKIT
www.DataSheet4U.com
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.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX17117ETJ+
-40NC to +85NC
32 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Applications
Notebook Computer Displays
Features
S 2.3V to 5.5V IN Supply-Voltage Range
S 1.2MHz Current-Mode Step-Up Regulator
Fast-Transient Response
High-Accuracy Reference (1%)
Integrated 16V, 2A, 200mI MOSFET
High Efficiency (> 85%)
Adjustable Cycle-by-Cycle Current Limit
S High-Performance Operational Amplifier
200mA Output Short-Circuit Current
40V/µs Slew Rate
16MHz, -3dB Bandwidth
Low-Dropout Linear Regulator
High-Accuracy Output Voltage (1.0%)
S High-Voltage Drivers with Scan Logic
+35V to -15V Outputs
40V Maximum Voltage Swing
Gate-Shading Control
S Thermal-Overload Protection
S 32-Pin, 5mm x 5mm, Thin QFN Package
Simplified Operating Circuit
VVGL
VGHON
VIN
IN
LX
ENA
LDOADJ
VLOGIC
LDOO
DTS
VGHON
GHON
ST
SETUP
CONTROLLER
LINEAR
REGULATOR
MAX17117
GATE-
SHADING
TIMING
CONTROL
OP
PGND
FB
COMP
SS
AGND
(EP)
OPAS
OUT
POS
STH
SYSTEM
CK1
CK3
CK5
SCAN DRIVER AND
GATE-SHADING
CONTROL LOGIC
CK2
CK4
CK6
VVGL VGL
CKH1
CKH3
CKH5
S1
S3
S5
RO
CKH2
CKH4
CKH6
S2
S4
S6
RE
VGLC
VMAIN
TO VCOM
BACKPLANE
PANEL
________________________________________________________________ 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.
1 page  
www.DataSheet4U.com
Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +3V, Circuit of Figure 1, VOPAS = +8.5V, VGHON = +24V, VVGL = -6.2V, VST = VCK_ = 0V, TA = -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
CONDITIONS
OPAS rising
No load
Falling edge
VIN = 2.5V to 5.5V, TA = +25NC
VFB = 1.3V, TA = +25NC
DICOMP = Q2.5FA, FB = COMP
VFB = 1.2V, duty cycle = 60%
ILX = 1A
VLX = 13.5V, TA = +25NC
VPOS = VOPAS/2, no load
OUT Voltage Swing High
IOUT = 5mA
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
IOUT = 5mA
Sourcing, short to VOPAS/2 - 1V
Sinking, short to VOPAS/2 + 1V
VPOS = VOPAS/2, TA = +25NC
VOUT = VOPAS/2
5V pulse applied to POS, OUT measured from 10% to
90%
VGHON - VVGL
CK1 through CK6 and ST low
CK1 through CK6 and ST low
STH, CKH_, VGLC, IOUT = -20mA
STH, CKH_, VGLC, IOUT = +20mA
CKH1, CKH3, CKH5, IRE = 10mA
CKH2, CKH4, CKH6, IRO = 10mA
CLOAD = 100pF, RLOAD = 0I
MIN TYP MAX UNITS
VIN
16.5
1000
91
1.227
1.05
75
1.6
0.10
2
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
5
VOPAS
- 100
100
100
-50
-15
10
15 V
1.2 mA
mV
100 mV
mA
+50 nA
+15 mV
V/Fs
12
-15
-500
100
35 V
-3 V
40 V
550 FA
FA
80 I
80 I
100
100 I
I
200 ns
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
VVGL
-6.0V, 10mA 2.2µF
86.6I
D5
6.2V,
200mW
0.22µF
D2
VIN
RENA
62kI
ENA
R5
51.1kI
LDOADJ
R6
49.9kI
C2
1µF
IN
C3
10µF
VLOGIC
RSET
29.4kI
C1
1µF
CSET
100pF
VGHON
0.1µF
LDOO
DTS
GHON
MAX17117
0.1µF
L1
10µH
SYSTEM
VVGL
0.1µF
ST
CK1
CK3
CK5
CK2
CK4
CK6
VGL
0.1µF
D3
0.1µF
D4
0.22µF
VGHON
23V, 25mA
D1
VMAIN
8.5V, 200mA
LX
PGND
C4
10µF
C5
10µF
FB
RCOMP
COMP 56.2kI
SS
AGND
(EP)
CCOMP
1000pF
CSS
0.33µF
C6
10µF
R1
102kI
R2
17.4kI
OPAS
OUT
POS
0.1µF
R3
56.2kI
R4
56.2kI
STH
CKH1
CKH3
CKH5
RO 1RkI0
CKH2
CKH4
CKH6
RE
RE 1kI
PANEL
VGLC
TO VCOM
BACKPLANE
Figure 1. Typical Application Circuit
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet MAX17117.PDF ] | |
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