19-4550; Rev 0; 4/09 MAX17088 Evaluation Kit/ Evaluation System General Description Features E The MAX17088 evaluation system (EV system) consists of (cid:2) +1.8V to +6V Input Range v the MAX17088 evaluation kit (EV kit) and the Maxim (cid:2) Output Voltages a CMAXQUSB command module. Windows®2000/XP®- and +8V Output at 300mA (+2.2V Input Step-Up l Windows Vista®-compatible software is also available for Switching Regulator) u use with the EV system (MAX17088EVCMAXQU+) and can +21V Output at 20mA (Positive Charge Pump) a be downloaded from www.maxim-ic.com/evkitsoftware. -13V Output at 20mA (Negative Charge Pump) t The MAX17088 EV kit (MAX17088EVKIT+) is a fully ±150mA High-Current Op-Amp Output e assembled and tested surface-mount PCB that pro- (cid:2) Resistor-Adjustable Switching Regulator and : vides the features required for active-matrix, thin-film Op-Amp Output Range M transistor (TFT) liquid-crystal displays (LCDs). The EV (cid:2) Digitally Programmable Op-Amp Output Voltage kit contains a step-up switching regulator, positive two- A (cid:2) +35V to -25V High-Voltage Level-Shifting Drivers stage charge pump, negative two-stage charge pump, digitally adjustable VCOM calibration device with non- (cid:2) > 85% Efficiency (Step-Up Switching Regulator) X volatile memory, SMBus™-compatible interface, high- (cid:2) 1.2MHz Step-Up Switching Frequency 1 speed operational amplifier (op amp), and high-volt- (cid:2) SMBus-Compatible Interface 7 age, level-shifting scan driver for TFT-LCD applications. 0 (cid:2) Windows 2000/XP- and Windows Vista The MAX17088 EV kit operates from a DC supply volt- 8 (32-Bit)-Compatible Software age from +1.8V to +6V. The step-up switching regulator 8 is configured for a +8V output providing at least 300mA (cid:2) 1.5mm Low-Profile Surface-Mount Components from a +2.2V input. The positive charge pump is config- (cid:2) Lead(Pb)-Free and RoHS Compliant ured for a +21V output providing at least 20mA. The (cid:2) Fully Assembled and Tested negative charge pump is configured for a -13V output providing at least 20mA. The op amp is capable of pro- viding up to ±150mA peak and features a programma- ble output voltage initially configured for +3.2V. The Ordering Information high-voltage level-shifting scan driver buffers inputs from STV, CPV, and OE pads and shifts them to a PART TYPE desired level to drive TFT-LCD row logic. MAX17088EVKIT+ EV Kit The MAX17088 EV kit demonstrates low quiescent cur- MAX17088EVCMAXQU+ EV System rent and high efficiency (> 85%) for maximum battery +Denotes lead(Pb)-free and RoHS compliant. time per charge. Operation at 1.2MHz allows the use of tiny surface-mount components. The MAX17088 36-pin Note:The Maxim command module (CMAXQUSB) is required when using the MAX17088 EV kit software. thin QFN package (0.8mm max height), with low-profile external components, allow this circuit to be less than Component List 1.5mm high. The Maxim CMAXQUSB command module provides DESIGNATION QTY DESCRIPTION the SMBus-compatible interface and is connected to a PC through the universal serial bus (USB) port. The 10µF ±20%, 6.3V X5R ceramic MAX17088 EV kit software provides a graphical user C1 1 capacitor (0603) interface (GUI) for exercising the MAX17088 features. TDK C1608X5R0J106M C2, C18, C19, Not installed, ceramic capacitors The MAX17088 is the successor to the MAX8798. 0 C20, C24 (0603) 68pF±5%, 50V C0G ceramic capacitor (0603) C3 1 Murata GRM1885C1H680J Windows, Windows XP, and Windows Vista are registered TDK C1608C0G1H680J trademarks of Microsoft Corp. 0.047µF ±10%, 50V X5R ceramic SMBus is a trademark of Intel Corp. capacitor (0603) C4 1 Murata GRM188R71H473K TDK C1608X7R1H473K ________________________________________________________________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.

MAX17088 Evaluation Kit/ Evaluation System 8 Component List (continued) 8 0 DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 7 0.22µF ±20%, 16V X5R ceramic JU1, JU2 2 2-pin headers 1 C5 1 capacitor (0603) Low-profile 4.7µH, 1.7A inductor X TDK C1608X5R1C224M (1.5mm max height) 1µF ±20%, 10V X5R ceramic Würth S07100060 or A L1 1 C6, C7 2 capacitors (0603) low-profile 5.1µH, 1.5A inductor M TDK C1608X5R1A105M (1.5mm max height) 0.1µF ±10%, 50V X7R ceramic Sumida CDRH5D14HPNP-5R1NC C8–C16 9 capacitors (0603) OECON 0 Not installed, test point e: TDK C1608X7R1H104K R1, R6, R7 3 200kΩ ±1% resistors (0603) t C17 0 Not installed, electrolytic capacitor R2 1 36.5kΩ ±1% resistor (0603) a (6.3mm x 5mm) R3 1 100kΩ ±1% resistor (0603) u 4.7µF ±10%, 16V X5R ceramic R4 1 10Ω ±5% resistor (0603) l capacitors (1206) a C21, C22 2 R5, R15 2 100kΩ ±5% resistors (0603) Murata GRM319R61C475kA88D v TDK C3216X5R1C475K R8 1 24.9kΩ ±1% resistor (0805) E Not installed, ceramic capacitor R9 1 20kΩ ±5% resistor (0603) C23 0 (1206) R10, R11 2 200Ω ±5% resistors (0603) 1A, 30V Schottky diode (S-Flat) R12, R13, R14 3 10kΩ ±5% resistors (0603) D1 1 CNeihnotnra El SPe1m0Qi CY0M3MSH1-40 R16 0 N(PoCt itnrasctaell)e (d0,6 r0e3s)istor—short Toshiba CRS02(TE85L) Internal-switch boost regulator 200mA, 100V dual diodes (SOT23) U1 1 (36 TQFN-EP*) Fairchild MMBD4148SE Maxim MAX17088ETX+ D2–D5 4 (Top Mark: D4) — 2 Shunts Central Semi CMPD7000, lead free — 1 PCB: MAX17088 EVALUATION KIT+ (Top Mark: C5C) *EP = Exposed pad. Dual-row (2 x 10) right-angle J1 1 receptacle Component Suppliers SUPPLIER PHONE WEBSITE Central Semiconductor Corp. 631-435-1110 www.centralsemi.com Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Nihon Inter Electronics Corp. 847-843-7500 www.niec.co.jp Sumida Corp. 847-545-6700 www.sumida.com TDK Corp. 847-803-6100 www.component.tdk.com Toshiba America Electronic Components, Inc. 949-623-2900 www.toshiba.com/taec Würth Electronik GmbH & Co. KG 201-785-8800 www.we-online.com Note:Indicate that you are using the MAX17088 when contacting these component suppliers. 2 _______________________________________________________________________________________

MAX17088 Evaluation Kit/ Evaluation System MAX17088 EV Kit Files For instructions on selecting the step-up switching regu- E lator feedback and op-amp divider resistors for other out- v FILE DESCRIPTION put voltages, see the Output-Voltage Selectionsection. a INSTALL.EXE Installs the EV kit files on Software Procedure l your computer u With the EV kit powered on, perform the following steps MAX17088.EXE Application program to verify software operation: a FTD2XX.INF USB device driver file 1) On the CMAXQUSB command module, ensure that t e UNINST.INI Uninstalls the EV kit software the shunt on jumper JU1 is in the +3.3V position. : TRO UB LE S HO OTING _U SB .PD F USB driver installation help 2) To enable the MAX17088, ensure that a shunt is file installed on jumper JU1 of the MAX17088 EV kit. M 3) Visit www.maxim-ic.com/evkitsoftware to down- A load the latest version of the MAX17088 EV kit soft- Quick Start ware, MAX17088Rxx.ZIP. Save the EV kit software X Recommended Equipment to a temporary folder and uncompress the ZIP file. 1 • +1.8V to +6V, 2A DC power supply for PIN pad 4) Install the EV kit software on your computer by run- 7 • MAX17088 EV system ning the INSTALL.EXE program inside the tempo- 0 rary folder. The program files are copied and icons 8 MAX17088 EV kit are created in the Windows Start | Programsmenu. 8 CMAXQUSB command module (USB cable 5) Carefully connect the boards by aligning the included) MAX17088 EV kit’s 20-pin connector (J1) with the • User-supplied Windows 2000/XP or Windows Vista CMAXQUSB board’s 20-pin connector (P3). Gently PC with a spare USB port press them together. The two boards should be flush against each other. • Voltmeter 6) Connect the USB cable from the PC to the Note: In the following sections, software-related items CMAXQUSB board. A Building Driver Database are identified by bolding. Text in bold refers to items window pops up in addition to a New Hardware directly from the EV kit software. Text in bold and under- Found message when installing the USB driver for linedrefers to items from the Windows operating system. the first time. If you do not see a window that is simi- Hardware Procedure lar to the one described above after 30s, remove the The MAX17088 EV kit is fully assembled and tested. USB cable from the board and reconnect it. Follow the steps below to verify board operation. Administrator privileges are required to install the Caution: Do not turn on the power supply until all USB device driver on Windows 2000/XP/Vista. connections are completed. 7) Follow the directions of the Add New Hardware 1) Verify that a shunt is installed across jumper JU1. Wizard to install the USB device driver. Choose the Search for the best driver for your device option. 2) Verify that a shunt is not installed across jumper JU2. Specify the location of the device driver to be 3) Connect the positive terminal of the power supply C:\Program Files\MAX17088 (default installation to the PIN pad. Connect the negative terminal of the directory) using the Browse button. During device power supply to the GND pad closest to PIN. driver installation, Windows may show a warning 4) Turn on the power supply and verify that the step- message indicating that the device driver Maxim up switching regulator output (MAIN) is +8V. uses does not contain a digital signature. This is not an error condition and it is safe to proceed with instal- 5) Verify that the gate-on supply (GON) is approxi- lation. Refer to the TROUBLESHOOTING_USB.PDF mately +21V. document included with the software for additional 6) Verify that the gate-off supply (GOFF) is approxi- information. mately -13V. 8) Start the MAX17088 EV kit software by opening its 7) Verify that the output of the high-speed op amp icon in the Start | Programsmenu. (VCOM) is approximately +3.2V. 9) Normal device operation is verified when MAX17088 connected is displayed in the status bar on the MAX17088 EV kit main window (Figure 1). _______________________________________________________________________________________ 3

MAX17088 Evaluation Kit/ Evaluation System 8 8 0 7 1 X A M : e t a u l a v E Figure 1. MAX17088 EV Kit Software Main Window Detailed Description of Hardware R7. Refer to the Setting the VCOM Adjustment Range section in the MAX17088 IC data sheet for more details. The MAX17088 EV kit contains a step-up switching reg- ulator, positive two-stage charge pump, negative two- The MAX17088 includes a 3-channel, high-voltage stage charge pump, digitally adjustable VCOM calibra- level-shifting driver for driving row-driver functions on tion device with nonvolatile memory, SMBus-compati- the panel glass. CKV, CKVB, and STVP pads are the ble interface, high-speed operational amplifier (op outputs of the driver. The outputs swing between GON amp), and high-voltage level-shifting scan driver for and GOFF according to the input logic levels on the TFT-LCD applications. The EV kit operates from a sin- STV, CPV, and OE pads and the IC’s internal logic. gle DC power supply between +1.8V and +6V that pro- Refer to the High-Voltage Level-Shifting Scan Driver vides at least 2A. section in the MAX17088 IC data sheet for more details. As configured, the step-up switching regulator (MAIN) Jumper Selection (JU1, JU2) generates a +8V output and provides at least 200mA The MAX17088 EV kit incorporates jumper JU1 to from a +1.8V input. It also provides at least 300mA from enable/disable the IC outputs and jumper JU2 to a +2.2V input and 600mA from a +4.5V input. The step- enable/disable write protection. When write protection up switching-regulator output voltage can be adjusted is enabled, all SMBus commands are ignored by the up to +18V with different feedback resistors (see the device. This prevents device detection and changing of Output-Voltage Selectionsection). the VCOM calibrator settings. See Table 1 for jumper The GON consists of two positive charge-pump stages JU1 functions and Table 2 for jumper JU2 functions. to generate approximately +21V and provides greater than 20mA. The GOFF consists of two negative charge- Table 1. Jumper JU1 Functions pump stages to generate approximately -13V and pro- vides greater than 20mA. Loading GON and GOFF SHUNT SHDN PIN EV KIT OUTPUTS reduces the available MAIN current proportionally. POSITION The op-amp output (VCOM) is SMBus programmable Outputs enabled Installed* SHDN connected to PIN and is configured for an output-voltage range of +2.4V (MAIN = +8V) to +4V. VCOM can source or sink peak current up to SHDN connected to GND Outputs disabled 150mA. The output-voltage range can be reconfigured Not installed through R5 (MAIN ≈ PIN) to other voltages with voltage-divider resistors R6 and *Default position. 4 _______________________________________________________________________________________

MAX17088 Evaluation Kit/ Evaluation System Table 2. Jumper JU2 Functions Loading 7-Bit DAC Setting E The DAC setting corresponds to a certain sink-current v SHUNT VCOM CALIBRATOR level, which in turn corresponds to a specific VCOM WPN PIN a POSITION WRITE PROTECTION voltage. With the MAX17088 EV kit software, the l WPN connected to device’s 7-bit internal DAC is configured by entering an u Installed Enabled appropriate DAC setting into the DAC edit box. The GND a DAC setting can be set from 0x00 (VCOMMAX) to 0x7F Not WPN connected to Disabled (VCOMMIN). The DAC setting is written to the device by te installed* VDD through R15 pressing the Load DAC button (Figure 1). : *Default position. Reading 7-Bit DAC M Output-Voltage Selection The MAX17088 7-bit DAC is read by either pressing the The MAX17088 EV kit’s step-up switching-regulator out- Read DAC button or by checking the DAC polling A put (MAIN) is set to +8V by feedback resistors R1 and checkbox. When checked, the software continuously X R2. To generate output voltages other than +8V (up to reads and displays the DAC’s current setting. +18V), select different external voltage-divider resis- 1 Programming MTP tors, R1 and R2. 7 The current DAC setting can be programmed into the Note that changing the MAIN voltage setting changes device’s internal MTP by entering an appropriate DAC 0 the GON and GOFF charge-pump output voltages. The setting into the DAC edit box and pressing the 8 voltage range on GOFF is limited to -25V and the voltage Program button. Pressing the Program button also 8 range on GON is limited to +35V. Setting the MAIN volt- loads the current setting into the DAC. Each time the age above +12V requires reconfiguring the charge device is powered on, the DAC is loaded with the set- pumps to avoid exceeding +35V on GON and -25V on ting stored in the device’s MTP. Programming is only GOFF. possible when GON is greater than +16V. In addition, output capacitors C21 and C22 are rated Simple SMBus Commands for +16V. To set MAIN for greater than +16V, use high- There are two methods for communicating with the er-voltage-rated capacitors. Refer to the Main Step-Up MAX17088, through the MAX17088 EV kit software Regulator, Output-Voltage Selectionsection in the main window (Figure 1), or through the interface win- MAX17088 IC data sheet for instructions on selecting dow available by selecting the Options | Interface resistors R1 and R2. menu item from the menu bar. The Maxim command Detailed Description of Software module interface window (Figure 2) includes a 2-wire interface tab that allows for execution of the The MAX17088 device includes a calibrator that is SMBusSendByte(), SMBusReceiveByte(), and used for adjusting an LCD’s backplane voltage (VCOM) SMBusQuick() commands. See Table 3 for details in TFT-LCD displays. The VCOM voltage is adjusted by regarding SMBus commands. The Command byte controlling the amount of sink current drawn by the cali- combo box accepts numeric data in binary, decimal, or brator. This is accomplished by programming the hexadecimal. Hexadecimal numbers should be pre- desired setting into the device’s 7-bit internal DAC. The fixed by $ or 0x. Binary numbers must be exactly eight software also facilitates reading of the device and pro- digits. See Figure 2 for an illustration of this tool. gramming of the device’s internal MTP. Refer to the MAX17088 IC data sheet for further details. _______________________________________________________________________________________ 5

MAX17088 Evaluation Kit/ Evaluation System 8 8 0 7 1 X A M : e t a u l a v E Figure 2. Command Module Interface Window Table 3. SMBus Commands CONTROL SMBus COMMAND FORMAT Input the desired 7-bit DAC setting into the Command byte combo box. Load DAC SMBusSendByte The 7-bit DAC value should be stored in the upper 7 bits (b7–b1) of the byte, with the LSB = 1. Input the desired 7-bit DAC setting into the Command byte combo box. Load DAC/program MTP SMBusSendByte The 7-bit DAC value should be stored in the upper 7 bits (b7–b1) of the byte, with the LSB = 0. Receives 8 bits from the device. The upper 7 bits correspond to the Read DAC SMBusReceiveByte current DAC setting and the LSB = 0. Search for device address shown in the Target Device Address combo Device search SMBusQuick box. The MAX17088 device address is 0x9E. 6 _______________________________________________________________________________________

MAX17088 Evaluation Kit/ Evaluation System E v a l u a t e : M A X 1 7 0 8 8 Figure 3. MAX17088 EV Kit Schematic _______________________________________________________________________________________ 7

MAX17088 Evaluation Kit/ Evaluation System 8 8 0 7 1 X A M : e t a u l a v E Figure 4. MAX17088 EV Kit Component Placement Guide—Component Side 8 _______________________________________________________________________________________

MAX17088 Evaluation Kit/ Evaluation System E v a l u a t e : M A X 1 7 0 8 8 Figure 5. MAX17088 EV Kit PCB Layout—Component Side _______________________________________________________________________________________ 9

MAX17088 Evaluation Kit/ Evaluation System 8 8 0 7 1 X A M : e t a u l a v E Figure 6. MAX17088 EV Kit PCB Layout—Layer 2 10 ______________________________________________________________________________________

MAX17088 Evaluation Kit/ Evaluation System E v a l u a t e : M A X 1 7 0 8 8 Figure 7. MAX17088 EV Kit PCB Layout—Layer 3 ______________________________________________________________________________________ 11

MAX17088 Evaluation Kit/ Evaluation System 8 8 0 7 1 X A M : e t a u l a v E Figure 8. MAX17088 EV Kit PCB Layout—Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. SPRINGER