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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX17103 Datasheet

DC-DC Converter

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19-4445; Rev 0; 2/09
EVAALVUAAILTAIOBNLEKIT
DC-DC Converter with Integrated Scan Driver,
VGL Controller, Op Amp, and LDO for TFT LCD
General Description
The MAX17103 includes a high-performance step-up
regulator, a 350mA low-dropout linear regulator, a high-
speed operational amplifier, a negative linear regulator
controller, and a high-voltage, level-shifting scan driver.
The device is optimized for thin-film transistor (TFT) liq-
uid-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 fast-transient
response to pulsed loads typical of source driver loads.
The step-up regulator features an adjustable soft-start
and an adjustable cycle-by-cycle current limit.
The high-current operational amplifier is designed to
drive the LCD backplane (VCOM). The amplifier fea-
tures high output current (±200mA), fast slew rate
(50V/µs), wide bandwidth (12MHz), and rail-to-rail
inputs and outputs.
The low-voltage LDO linear regulator has an integrated
0.8Ω pass element and can provide at least 350mA.
The output voltage is accurate within ±1%.
The high-voltage, level-shifting scan driver is designed to
drive the TFT panel gate drivers. Its three outputs can
swing up to 40V (max) to swiftly drive capacitive loads. To
save power, the two complementary outputs are designed
to allow charge sharing during state changes.
The MAX17103 is available in a 32-pin, 5mm x 5mm,
thin QFN package with a maximum thickness of 0.8mm
for thin LCD panels.
Applications
Notebook Computer Displays
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX17103ETJ+
-40°C to +85°C 32 Thin QFN-EP*
AUO-P1721.14
-40°C to +85°C 32 Thin QFN-EP*
+Denotes lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Features
o 2.3V to 5.5V IN Supply Voltage Range
o 1.2MHz Current-Mode Step-Up Regulator
Fast-Transient Response
High-Accuracy Reference (1%)
Integrated 16V, 2A, 200mΩ MOSFET
High Efficiency (> 85%)
Adjustable Cycle-by-Cycle Current Limit
o High-Performance Operational Amplifier
200mA Output Short-Circuit Current
50V/µs Slew Rate
12MHz, -3dB Bandwidth
o Low-Dropout Linear Regulator
High-Accuracy Output Voltage (1.0%)
o High-Voltage Drivers with Scan Logic
+35V to -15V Outputs
40V (Max) Swing
o Linear Regulator Controller for Gate-Off Supply
o Thermal-Overload Protection
o 32-Pin, 5mm x 5mm, Thin QFN Package
Simplified Operating Circuit
VVGL
VIN
VGHON
VMAIN
VLOGIC
VGHON
SYSTEM
VVGL
DRVN IN
FBN
VGL
REF CONTROLLER
ENA
LDOADJ
STEP-UP
CONTROLLER
LDOO
LINEAR
REGULATOR
VDET
CD
MAX17103
AUO-P1721.14
LX
PGND
FB
COMP
SS
AGND
OPAS
VOLTAGE
DETECTOR
RST
OP
OUT
GHON
CK
CS
XCK
ST SCAN
DRIVER
LOGIC
POS
CKH
QS
XCKH
STH
To VCOM
BACKPLANE
PANEL
VGLC
VGHON
GD
VGL
Pin Configuration appears at end of data sheet.
________________________________________________________________ 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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX17103 Datasheet

DC-DC Converter

No Preview Available !

DC-DC Converter with Integrated Scan Driver,
VGL Controller, Op Amp, and LDO for TFT LCD
ABSOLUTE MAXIMUM RATINGS
IN, RST to AGND ...................................................-0.3V to +7.5V
FB, FBN, CD, ENA, VDET, SS, CS, ST,
CK, XCK to AGND...................................-0.3V to (VIN + 0.3V)
LDOADJ, LDOO, COMP, REF to AGND ......-0.3V to (VIN + 0.3V)
PGND to AGND .....................................................-0.3V to +0.3V
LX, OPAS to PGND.................................................-0.3V to +18V
DRVN to AGND.............................................-20V to (VIN + 0.3V)
GHON to PGND......................................................-0.3V to +40V
VGL to PGND ........................................................ -20V to +0.3V
GHON to VGL…………………………………………-0.3V to +45V
GD to PGND ..........................................-0.3V to (VGHON + 0.3V)
GD to VGHON ........................................................-15V to +0.3V
VGLC, STH, CKH, XCKH ........(-0.3V + VVGL) to (VGHON + 0.3V)
OUT, POS to PGND ................................-0.3V to (VOPAS + 0.3V)
POS to OUT ...........................................................-7.5V to +7.5V
OUT Maximum Continuous Output Current......................±75mA
GHON, STH, VGL, CKH, and XCKH RMS Current Rating 120mA
LX, PGND RMS Current Rating.............................................1.6A
Continuous Power Dissipation (TA = +70°C)
32-Pin TQFN (derate 24.9mW/°C above +70°C).......1990mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°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
(VIN = +3V, Circuit of Figure 1, VOPAS = +8.5V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
IN Input-Voltage Range
IN Undervoltage Lockout
IN Standby Current
GHON Standby Current
OPAS Shutdown Current
IN Quiescent Current
Duration to Trigger Fault Condition
VIN rising, typical hysteresis = 150mV
VENA = 0, VIN = 5.5V, VGHON = 4V, VGL = 0
VENA = 0, VIN = 5.5V, VGHON = 4V, VGL = 0
VENA = 0, VIN = 5.5V, VGHON = 4V, VGL = 0
VFB = 1.3V, LX not switching
VFB = 1.2V, LX switching
2.3
1.80
2.00
0.7
100
10
1
2
160
5.5
2.20
2
200
30
2.5
4
V
V
mA
μA
μA
mA
ms
Thermal Shutdown
Temperature rising
+160
°C
REFERENCE
REF Output Voltage
No external load
1.227 1.240 1.252
V
REF Load Regulation
REF Sink Current
0 < ILOAD < 50μA
In regulation
mV
-20 +10 μA
STEP-UP REGULATOR
Output-Voltage Range
Frequency
VIN
1000
1200
15
1400
V
kHz
Oscillator Maximum Duty Cycle
91 94 97
%
FB Regulation Voltage
No load
1.227 1.240 1.252
V
FB Fault Trip Level
Falling edge
1.05 1.10 1.15
V
Overvoltage Protection
OPAS rising (Note 1)
16.5
17
18
V
FB Load Regulation
FB Line Regulation
FB Input Bias Current
FB Transconductance
0 < ILOAD < full load, transient only
VIN = 2.5V to 5.5V, TA = +25°C
VIN = 2.5V to 5.5V, TA = 0°C to +85°C
VFB = 1.3V, TA = +25°C
I = ±2.5μA at COMP, FB = COMP
-0.5 %
0.1 0.15
%/V
0.2
65 200 nA
75 160 280 μS
FB Voltage Gain
LX Current Limit
FB to COMP
700
VFB = 1.2V, duty cycle = 60%, RENA = 10k, VLDOO = 2.5V 1.6 2 2.4
V/V
A
2 _______________________________________________________________________________________


Part Number MAX17103
Description DC-DC Converter
Maker Maxim Integrated
PDF Download

MAX17103 Datasheet PDF






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