MAX17094 19-4348 Rev 0 10/08 Internal-Switch Boost Regulator with Integrated 7-Channel Driver, VCOM Calibrator, Op Amp, and LDO General Description Features 1.8V to 5.5V IN Supply Voltage Range The MAX17094 includes a high-performance step-up regulator, a 250mA low-dropout (LDO) linear regulator, a 450kHz to 1.2MHz Adjustable Frequency Current- high-speed operational amplifier, a digitally adjustable Mode Step-Up Regulator Fast-Transient Response VCOM calibration device with nonvolatile memory and 2 Integrated 14V, 2.5A, 150m MOSFET I C interface, and seven integrated high-voltage level High Efficiency (> 85%) shifters. The device is optimized for thin-film transistor Low-Dropout Linear Regulator (TFT) liquid-crystal display (LCD) applications. High-Accuracy Output Voltage (2.0%) The step-up DC-DC converter is a current-mode regu- Internal Digital Soft-Start lator that provides the regulated supply voltage for High-Performance Operational Amplifier panel source driver ICs. The current-mode architecture 200mA Output Short-Circuit Current provides fast-transient responses to pulsed loads typi- 45V/s Slew Rate cal of source driver loads. The high switching frequen- 20MHz, -3dB Bandwidth cy, which is programmable to any frequency between Rail-to-Rail Inputs and Outputs 450kHz to 1.2MHz with a single resistor, allows the use High-Voltage Drivers of ultra-small inductors and ceramic capacitors. The +30V to -10V Outputs step-up regulators soft-start time is controlled by an 2 I C Programmable VCOM Calibrator internal 10ms digital timer that requires no external 7-Bit Adjustable Current-Sink Output components or if desired, the soft-start time can be Nonvolatile IVR Memory adjusted by adding a single external capacitor. Thermal-Overload Protection The low-voltage LDO linear regulator can provide at Ordering Information least 250mA. The output voltage is accurate within 2%. The high-voltage, level-shifting scan driver is designed PART TEMP RANGE PIN-PACKAGE to work with panels that incorporate row drivers on the MAX17094ETM+ -40C to +85C 48 TQFN-EP* panel glass. Its seven outputs swing from +30V to -10V +Denotes a lead(Pb)-free/RoHS-compliant package. and can swiftly drive capacitive loads. *EP = Exposed pad. The high-performance op amp is designed to drive the Pin Configuration LCD backplane and features 20MHz bandwidth, 45V/s slew rate, and 150mA output currents. TOP VIEW The programmable VCOM calibrator is externally attached to the VCOM amplifiers resistive voltage- 36 35 34 33 32 31 30 29 28 27 26 25 divider and sinks a programmable current to adjust the VCOM voltage level. An internal 7-bit digital-to-analog FB 24 Y8 37 converter (DAC) controls the sink current. The DAC is PGND 23 Y7 38 ratiometric relative to AVDD and is guaranteed monoto- PGND 39 22 Y6 nic over all operating conditions. The calibrator LX 40 21 Y5 includes a nonvolatile memory device (IVR) to store the 2 desired VCOM voltage level. The 2-wire I C interface LX 41 20 Y4 simplifies production equipment. 19 Y3 FREQ 42 MAX17094 The MAX17094 is available in a 48-pin, 6mm x 6mm 43 18 Y2 EN TQFN package with a maximum thickness of 0.8mm for IN 44 17 YDCHG thin LCD panels. SENSE 45 16 SS Applications COMP 15 A2 46 *EP Notebook Computer Displays AGND 47 14 A3 VL 48 13 A4 2 1 34 5 67 89 10 11 12 *EP = EXPOSED PAD. TQFN 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 AVAILABLE AVDD LIN OUT LOUT FBL POS GND NEG ADDR0 VCOM BGND ADDR1 SET SCL SDA GND A8 GON1 GON2 A7 A6 GND GOFF A5Internal-Switch Boost Regulator with Integrated 7-Channel Driver, VCOM Calibrator, Op Amp, and LDO ABSOLUTE MAXIMUM RATINGS IN, LIN, LOUT, EN, VL, A2A8, Y7, Y8 to GND .........................(V - 0.3V) to (V + 0.3V) GOFF GON2 SCL, SDA, ADDR0, ADDR1..............................-0.3V to +7.5V LX, PGND RMS Current .......................................................2.4A COMP, FB, SENSE, SS to AGND............-0.3V to (V + 0.3V) Y1Y7, YDCHG RMS Current..............................................33mA VL FBL to AGND.............................................-0.3V to (V + 0.3V) GON1 RMS Current ...........................................................46mA LIN FREQ, SET to GND.....................................-0.3V to (V + 0.3V) GON2 RMS Current ...........................................................83mA VL LX to PGND ............................................................-0.3V to +16V GOFF RMS Current ..........................................................115mA AVDD to BGND ......................................................-0.3V to +16V Continuous Power Dissipation (T = +70C) A POS, NEG, OUT, VCOM to BGND ......-0.3V to (V to +0.3V) 48-Pin, 6mm x 6mm TQFN AVDD POS to NEG.................................................................-6V to +6V (derate 20mW/C above +70C).............................2963mW GND, PGND, BGND to AGND...............................-0.3V to +0.3V Junction Temperature......................................................+150C GON1, GON2 to GND ............................................-0.3V to +35V Storage Temperature Range .............................-65C to +150C GOFF to GND........................................................-14V to + 0.3V Lead Temperature (soldering, 10s) .................................+300C Y2Y6, YDCHG to GND ..........(V - 0.3V) to (V + 0.3V) GOFF GON1 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 = V = V = +3.3V, circuit of Figure 2, V = 8V, V = V = 21V, V = -6.5V, T = 0C to +85C. Typical val- IN LIN EN MAIN GON1 GON2 GOFF A ues are at T = +25C, unless otherwise noted.) A PARAMETER CONDITIONS MIN TYP MAX UNITS GENERAL IN Input-Voltage Range 1.8 5.5 V IN Shutdown Current EN = 0 30 100 A IN Quiescent V = 3V, V = 1.5V, not switching, V > 2.3V 100 A IN FB L IN Undervoltage Lockout V rising, typical hysteresis 200mV 1.30 1.75 V IN Thermal Shutdown Rising edge, typical hysteresis 15C 160 C BOOTSTRAP LINEAR REGULATOR (VL) VL Output Voltage 3.8 4.0 4.2 V VL Maximum Output Current VL = 3.7V 10 mA LINEAR REGULATOR LIN Input-Voltage Range V < V 1.8 5.5 V LOUT LIN LIN Quiescent Current No load 2 mA Dropout Voltage I = 250mA, V - V 0.3 V LOUT LIN LOUT FBL Regulation Voltage I = 100mA 605 618 631 mV LOUT FBL Input Bias Current V = 0.618V, T = +25C -50 +50 nA FBL A LOUT Maximum Output Current V = 0.5V 250 mA FBL LOUT Load Regulation V =5V, 5mA < I < 250mA, not in dropout 1 % LIN OUT Soft-Start Period 7-bit voltage ramp 3 ms 2 MAX17094