MAX17117 19-5241 Rev 0 4/10 Internal-Switch Boost Regulator with Integrated 7-Channel Scan Driver, Op Amp, and LDO S High-Performance Operational Amplifier General Description 200mA Output Short-Circuit Current The MAX17117 includes a high-performance step-up 40V/s Slew Rate regulator, a 350mA low-dropout (LDO) linear regulator, 16MHz, -3dB Bandwidth a high-speed operational amplifier, and a high-voltage Low-Dropout Linear Regulator level-shifting scan driver with gate-shading control. The High-Accuracy Output Voltage (1.0%) device is optimized for thin-film transistor (TFT) liquid- S High-Voltage Drivers with Scan Logic crystal display (LCD) applications. +35V to -15V Outputs The step-up DC-DC converter provides the regulated 40V Maximum Voltage Swing Gate-Shading Control supply voltage for panel source-driver ICs. The high 1.2MHz switching frequency allows the use of ultra-small S Thermal-Overload Protection inductors and ceramic capacitors. The current-mode S 32-Pin, 5mm x 5mm, Thin QFN Package control architecture provides a fast-transient response to pulsed loads typical of source driver loads. The step-up Simplified Operating Circuit regulator features an adjustable soft-start and an adjust- able cycle-by-cycle current limit. V VVGL GHON The high-current operational amplifier is designed to V IN VMAIN drive the LCD backplane (VCOM). The amplifier features high output current (Q200mA typ), fast slew rate (40V/Fs IN LX typ), wide bandwidth (16MHz typ), and rail-to-rail inputs and outputs. PGND The low-voltage LDO linear regulator has an integrated ENA SETUP FB CONTROLLER COMP LDOADJ 0.8I pass element and can provide at least 350mA. The SS output voltage is accurate within Q1%. LINEAR AGND (EP) REGULATOR The high-voltage, level-shifting scan driver with gate- LDOO MAX17117 V LOGIC OPAS shading control is designed to drive the TFT panel gate OUT drivers. Its seven outputs swing 40V (maximum) between GATE- OP TO VCOM DTS SHADING BACKPLANE TIMING +35V (maximum) and -15V (minimum) and can swiftly CONTROL POS drive capacitive loads. GHON VGHON The MAX17117 is available in a 32-pin, 5mm x 5mm, thin ST STH QFN package with a maximum thickness of 0.8mm for thin LCD panels. CK1 CKH1 Ordering Information CK3 CKH3 PART TEMP RANGE PIN-PACKAGE CK5 CKH5 MAX17117ETJ+ -40NC to +85NC 32 TQFN-EP* S1 SYSTEM S3 +Denotes a lead(Pb)-free/RoHS-compliant package. S5 *EP = Exposed pad. SCAN DRIVER AND RO PANEL GATE-SHADING CONTROL LOGIC Applications CK2 CKH2 Notebook Computer Displays CK4 CKH4 Features CK6 CKH6 S2 S 2.3V to 5.5V IN Supply-Voltage Range S4 S 1.2MHz Current-Mode Step-Up Regulator S6 Fast-Transient Response RE High-Accuracy Reference (1%) VGLC Integrated 16V, 2A, 200mI MOSFET VGL VVGL High Efficiency (> 85%) Adjustable Cycle-by-Cycle Current Limit Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLEInternal-Switch Boost Regulator with Integrated 7-Channel Scan Driver, Op Amp, and LDO ABSOLUTE MAXIMUM RATINGS IN, ENA, FB, COMP, SS, DTS, LDOADJ, ST, GHON and VGL RMS Current Rating ..................................0.8A CK1CK6, LDOO to AGND ...............................-0.3V to +7.5V VGLC, STH, and CKH1CKH6 RMS Current Rating ...........0.8A PGND to AGND ....................................................-0.3V to +0.3V LX, PGND RMS Current Rating ............................................1.6A LX, OPAS to PGND ...............................................-0.3V to +18V Continuous Power Dissipation (T = +70NC) A GHON to PGND ....................................................-0.3V to +45V 32-Pin TQFN (derate 24.9mW/NC above +70NC) .......1990mW VGL to PGND ....................................................... -20V to +0.3V Operating Temperature Range .......................... -40NC to +85NC GHON to VGL .................................................................... +45V Junction Temperature .....................................................+150NC STH, CKH1CKH6, VGLC, RO, Storage Temperature Range ............................ -65NC to +160NC RE to VGL .........................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) ................................+300NC GHON OUT, POS to PGND ..............................-0.3V to (V + 0.3V) Soldering Temperature (reflow) ......................................+260NC OPAS 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 = +3V, Circuit of Figure 1, V = +8.5V, V = +24V, V = -6.2V, V = V = 0V, T = 0NC to +85NC, unless otherwise IN OPAS GHON VGL ST CK A noted. Typical values are at T = +25NC.) A PARAMETER CONDITIONS MIN TYP MAX UNITS IN Input Voltage Range 2.3 5.5 V IN Undervoltage-Lockout V rising, typical hysteresis = 150mV 1.80 2.00 2.20 V IN Threshold V = 1.3V, LX not switching 1.0 2.5 FB IN Quiescent Current mA V = 1.2V, LX switching 2.5 5 FB IN Standby Current V = V = 0V, V = 5.5V, V = 4V 0.7 2 mA ENA VGL IN GHON GHON Standby Current V = V = 0V, V = 5.5V, V = 4V 100 200 FA ENA VGL IN GHON OPAS Standby Current V = V = 0V, V = 5.5V, V = 4V 20 50 FA ENA VGL IN GHON Thermal Shutdown Temperature rising 145 170 NC STEP-UP REGULATOR Output Voltage Range V 15 V IN OPAS Overvoltage Threshold OPAS rising 16.5 17 18 V Operating Frequency 1000 1200 1400 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 Fault-Trigger Delay 160 ms FB Load Regulation 0 < I < full load -0.2 % LOAD FB Line Regulation 0.1 0.25 %/V V = 2.5V to 5.5V, T = +25NC IN A FB Input-Bias Current V = 1.24V, T = +25NC 65 200 nA FB A FB Transconductance DI = Q2.5FA, FB = COMP 75 160 280 FS COMP LX Current Limit 1.6 2 2.4 A R = 10kW, duty cycle = 60% ENA LX On-Resistance I = 1A 200 500 mI LX LX Input-Bias Current V = 13.5V, T = +25NC 10 20 FA LX A Current-Sense Transresistance 0.10 0.20 0.30 V/A Soft-Start Pullup Current 2 4 6 FA 2 MAX17117