19-3137; Rev 0; 1/04 MAX1587A Evaluation Kit/ MAX1587A Evaluation System The MAX1587A evaluation system (EV system) consists of a MAX1587A evaluation kit (EV kit) and a companion Maxim system management bus (SMBus)™ interface board. The MAX1587A evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that evaluates the MAX1587A power-management IC (PMIC). The IC is optimized for microprocessor-based applications. The MAX1587A integrates three high-performance synchronous step-down DC-DC power supplies, two low-dropout (LDO) regulators, a battery backup supply, and various power-management functions. The Maxim SMBus interface board (MAXSMBUS) allows an IBM-compatible PC to use its parallel port to emulate an SMBus/I2C™-compatible 2-wire interface. Windows 98/2000/XP®-compatible software provides a professional interface to exercise the features of the MAX1587A. The program is menu driven and offers a graphical user interface (GUI) with control buttons and a status display. The MAX1587AEVSYS includes both the EV kit and the MAXSMBUS interface board. Order the MAX1587A EV kit if you already have an SMBus interface. Features ♦ 2.6V to 5.5V Single-Supply Operation ♦ Six-Output Power Supply 3.3V at 1.3A (VCC_I/O) 2.5V at 900mA (VCC_MEM) 0.7V to 1.475V at 500mA (VCC_CORE), Software Adjustable 1.3V at 35mA (VCC_PLL) 1.1V at 40mA (VCC_SRAM) Backup Battery Supply (30mA) ♦ 1MHz Switching Frequency ♦ On-Board Manual Reset Switch ♦ ♦ ♦ ♦ ♦ Optional On-Board Power-Sequencing Circuitry Power-OK Output Low-Profile Components SMBus/I2C-Compatible 2-Wire Serial Interface Easy-to-Use Menu-Driven Software ♦ Software-Controlled Core Voltage Adjustment ♦ Assembled and Tested ♦ Includes Windows 98/2000/XP-Compatible Software Ordering Information SMBus is a trademark of Intel Corp. I 2C is a trademark of Philips Corp. Purchase of I 2C components of Maxim Integrated Products, Inc. or one of its sublicensed Associated Companies, conveys a license under the Philips I 2C Patent Rights to use these components in an I 2C system, provided that the system conforms to the I 2C Standard Specification as defined by Philips. Windows is a registered trademark of Microsoft Corp. PART TEMP RANGE MAX1587AEVKIT 0°C to +70°C MAX1587AEVSYS 0°C to +70°C SMBus IC INTERFACE PACKAGE TYPE 40 QFN Not included 40 QFN MAXSMBUS Note: The MAX1587AEVSYS includes both the EV kit and the MAXSMBUS interface board. The MAX1587A EV kit software is provided with the MAX1587AEVKIT; however, the MAXSMBUS board is required to interface the EV kit to the computer when using the included software. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION C16 1 1500pF ±10%, 50V X7R ceramic capacitor (0402) TDK C1005X7R1H152K C1 0 Not installed (0805) C2–C5 0 Not installed (0603) C6, C7, C8 0 Not installed (0402) C9, C13, C14, C15 C26, C27, C29 7 10µF ±20%, 6.3V X5R ceramic capacitors (0805) TDK C2012X5R0J106M C17 1 0.1µF ±20%, 6.3V X5R ceramic capacitor (0402) TDK C1005X5R0J104M C10, C11, C12, C28 4 4.7µF ±20%, 6.3V X5R ceramic capacitors (0805) TDK C2012X5R0J475M C18 1 0.01µF ±20%, 25V X7R ceramic capacitor (0402) TDK C1005X7R1E103M ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX1587A General Description MAX1587A Evaluation Kit/ MAX1587A Evaluation System Evaluates: MAX1587A Component List (continued) DESIGNATION QTY C19–C22 4 1 C24 C23, C25 2 DESIGNATION QTY 1.0µF ±20%, 10V X5R ceramic capacitors (0603) TDK C1608X5R1A105M L2 1 6.8µH, 1.51A inductor TOKO A915AY-6R8M 270pF ±5%, 50V C0G ceramic capacitor (0603) TDK C1608C0G1H271J L3 1 10µH, 0.85A inductor Sumida CDRH2D18/HP-100 TOKO A960AW-100M R1, R2, R3, R6, R17, R18 0 Not installed (0402) DESCRIPTION 330pF ±5%, 50V C0G ceramic capacitors (0603) TDK C1608C0G1H331J R4, R5, R7–R10 0 Not installed (0603) R11, R12, R13 3 1MΩ ±5% resistors (0402) R14, R15, R16 3 240kΩ ±1% resistors (0402) SW1 1 Momentary pushbutton switch (NO) D1 1 Switching diode (SOT323) Central Semiconductor CMSD4448 J1 1 2 x 10 right-angle female receptacle U1 1 Maxim MAX1587AETL (40-pin thin QFN) JU1–JU7 7 Jumpers, 3-pin headers None 7 Shunts 3.3µH, 2.66A inductor TOKO A915AY-3R3M None 1 MAX1587A PC board None 1 Software disk (CD-ROM) “MAX1587A Evaluation Kit” L1 1 Quick Start Recommended Equipment • Computer running Windows 98, 2000, or XP • Parallel printer port (this is a 25-pin socket on the back of the computer) • Standard 25-pin, straight-through, male-to-female cable (printer extension cable) to connect the computer’s parallel port to the Maxim SMBus interface board • 9V/50mA DC power supply (for MAXSMBUS interface board) • 4V/2A DC power supply • 3.6V backup battery (optional) • 7 voltmeters Procedure The MAX1587A EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed: 1) Carefully connect the boards by aligning the 20-pin connector of the MAX1587A EV kit with the 20-pin header of the MAXSMBUS interface board. Gently press them together. 2 DESCRIPTION 2) Ensure that a shunt is placed across pins 1 and 2 of jumpers JU1, JU2, JU3, JU4, and JU5 (enable all power outputs). 3) Ensure that a shunt is placed across pins 2 and 3 of jumpers JU6 (set default SMBUS address) and JU7 (pulse skipping enabled on VCC_CORE). 4) Connect a cable from the computer’s parallel port to the SMBus interface board. Use a straightthrough 25-pin female-to-male cable. 5) The MAX1587A.EXE software program can be run from the CD-ROM or hard drive. Use the Windows program manager to run the program. If desired, you can use the INSTALL.EXE program to copy the files and create icons in the Windows 98/2000/XP Start menu. Do not turn on the power until all connections are made. 6) Connect the 9V power supply to the pads labeled POS9 and GND1 on the MAXSMBUS interface board. 7) Connect the 4V power supply to the pads labeled VIN and GND on the MAX1587A EV kit board. 8) Connect the optional backup battery to the pads labeled BKBT and GND. _______________________________________________________________________________________ MAX1587A Evaluation Kit/ MAX1587A Evaluation System Evaluates: MAX1587A 9) Connect a voltmeter to the pads labeled VCC_I/O and GND. 10) Connect a voltmeter to the pads labeled VCC_MEM and GND. 11) Connect a voltmeter to the pads labeled VCC_CORE and GND. 12) Connect a voltmeter to the pads labeled VCC_PLL and GND. 13) Connect a voltmeter to the pads labeled VCC_SRAM and GND. 14) Connect a voltmeter to the pads labeled VCC_BATT and GND. 15) Connect a voltmeter to the pads labeled POK and GND. 16) Turn on the DC power supplies. 17) Verify the following voltages: VCC_I/O = 3.3V VCC_MEM = 2.5V VCC_CORE = 1.3V VCC_PLL = 1.3V VCC_SRAM = 1.1V VCC_BATT = 3.3V 18) Verify that POK is high. 19) Start the MAX1587A program by opening its icon in the Start menu. 20) Observe as the program automatically detects the address of the MAX1587A and starts the main program. Detailed Description of Software User-Interface Panel The user interface (shown in Figure 1) is easy to operate; use the mouse, or press the Tab key to navigate with the arrow keys. Each of the buttons corresponds to bits in the command and configuration bytes. By clicking on them, the correct SMBus write operation is generated to update the internal registers of the MAX1587A. The Interface box indicates the current Device Address, and the Data Sent/Received (the MAX1587A EV kit software only sends) for the last read/write operation. This data is used to confirm proper device operation. Note: Words in boldface are user-selectable features in the software. Figure 1. MAX1587A EV Kit Software Main Window Core Voltage Control The core voltage (VCC_CORE) can be adjusted in 25mV increments by adjusting the Core Voltage slider. Alternatively, a number can be entered in the box below the Core Voltage slider. If a number not divisible by 0.025 is entered, the software automatically rounds the number to the nearest 25mV increment and sends the appropriate data to the MAX1587A. Check the Extend checkbox to increase the core voltage range to 0.7V to 1.475V. Simple SMBus Commands There are two methods for communicating with the MAX1587A: through the normal user-interface panel or through the SMBus commands available by selecting the 2-Wire Interface Diagnostic item from the Options pulldown menu. A display pops up that allows the SMBus protocols, such as Read Byte, Write Byte, and Send Byte, to be executed. _______________________________________________________________________________________ 3 Evaluates: MAX1587A MAX1587A Evaluation Kit/ MAX1587A Evaluation System Figure 2. A Simple SMBusSendByte Operation Using the Included Two-Wire Interface Diagnostics. In this example, the software is writing data (0x13) to Device Address 0x28. The above data sequence sets the core voltage of the MAX1587A to 1.175V. The SMBus dialog boxes accept numeric data in binary, decimal, or hexadecimal form. Hexadecimal numbers should be prefixed by $ or 0x. Binary numbers must be exactly eight digits. See Figure 2 for an example of this tool. Note: In places where the slave address asks for an 8bit value, it must be the 7-bit slave address of the MAX1587A as determined by SRAD with the last bit set to 1 for a read operation or zero for a write operation. Refer to the MAX1587A data sheet for a complete list of registers and functions. Detailed Description of Hardware The MAX1587A EV kit is a fully assembled and tested surface-mount circuit board that evaluates the MAX1587A power-management IC. The MAX1587A integrates three high-performance, 1MHz, synchronous step-down DC-DC power supplies, two low-dropout regulators, and a battery backup supply. 4 The power outputs consist of a 3.3V at 1.3A I/O (VCC_I/O) step-down output, 2.5V at 900mA memory (VCC_MEM) step-down output, a software adjustable 0.7V to 1.475V at 500mA core (VCC_CORE) step-down output, a 1.3V at 35mA phase-locked loop (VCC_PLL) LDO, and a 1.1V at 40mA SRAM (VCC_SRAM) LDO. An additional 30mA backup battery (VCC_BATT) output is also available. Power-management functions include a power-OK (POK) output, a manual-reset input, multiple outputenable inputs, and a reset output. Activate the manual reset input by pressing the switch labeled SW1. Power sequencing is also available through component placeholders R4, R5, R7, R8, C2, C3, C4, and C5. See the Optional Power-Sequencing Circuitry section for more details. _______________________________________________________________________________________ MAX1587A Evaluation Kit/ MAX1587A Evaluation System Sleep Mode Jumper JU1 controls the sleep function of the MAX1587A EV kit. Removing the shunt from JU1 allows the sleep function to be controlled by an external signal source connected to the SLP pad. See Table 2 for sleep shunt positions. Output Enables Jumpers JU2–JU5 control the on/off state of the MAX1587A EV kit VCC_I/O, VCC_MEM, VCC_CORE, VCC_PLL, and VCC_SRAM outputs. Removing the shunt allows the output enable function to be controlled by an external signal source. See Table 3 for outputenable shunt positions. Pulse-Skipping Mode Jumper JU7 controls the pulse-skipping mode of the VCC_CORE output. See Table 4 for pulse-skipping shunt positions. Adjusting the I/O Voltage The I/O (VCC_I/O) output voltage can be adjusted from its default value of 3.3V. Cut the trace at R3 and install a 0Ω resistor at R17 to set the I/O voltage to 3.0V. To set the I/O voltage to an alternative value, cut the trace at R3 and install resistors at R1 and R3. Use the equation below to calculate resistor values: VCC _ I / O R1 = R3 × − 1 VFB1 where R3 = 100kΩ, VCC_I/O = desired I/O voltage, and VFB1 = 1.25V. Table 1. Shunts Settings for SMBus Address (JU6) MAX1587A ADDRESS PIN BINARY HEXADECIMAL 1-2 VIN 0010 1010 0x2A 2-3* GND 0010 1000 0x28 *Default Configuration: JU6 (2-3) Table 2. Sleep Selection (JU1) SHUNT POSITION VCC _ MEM R2 = R6 × − 1 VFB2 where R6 = 100kΩ, VCC_MEM = desired MEM voltage, and VFB2 = 1.25V. DESCRIPTION 1-2* I/O and MEM DC-DC converters enabled 2-3 I/O and MEM DC-DC converters disabled; I/O and MEM sleep LDOs enabled Not Installed SLP function controlled by an external signal source *Default Configuration: JU1 (1-2) Table 3. Output Enable (JU2–JU5) JUMPER JU2 (ON2) SHUNT POSITION JU3 (ON1) JU4 (ON45) VCC_MEM output enabled 2-3 VCC_MEM output disabled ON2 controlled by an external signal source 1-2* VCC_I/O output enabled 2-3 VCC_I/O output disabled Not Installed ON1 controlled by an external signal source 1-2* VCC_PLL/VCC_SRAM output enabled 2-3 VCC_PLL/VCC_SRAM output disabled Not Installed JU5 (ON3) DESCRIPTION 1-2* Not Installed Adjusting the MEM Voltage The MEM (VCC_MEM) output voltage can be adjusted from its default value of 2.5V. Cut the trace at R6 and install a 0Ω resistor at R18 to set the MEM voltage to 1.8V. To set the MEM voltage to an alternative value, cut the trace at R6 and install resistors at R2 and R6. Use the equation below to calculate resistor values: MAX1587A ADDRESS SHUNT POSITION ON45 controlled by an external signal source 1-2* VCC_CORE output enabled 2-3 VCC_CORE output disabled Not Installed ON3 controlled by an external signal source *Default Configuration: JU2 (1-2), JU3 (1-2), JU4 (1-2), JU5 (1-2) _______________________________________________________________________________________ 5 Evaluates: MAX1587A Address Selection Jumper JU6 sets the MAX1587A slave address. The default address is 0010 1000 (SRAD = GND). See Table 1 for a complete list of addresses. Evaluates: MAX1587A MAX1587A Evaluation Kit/ MAX1587A Evaluation System Optional Power-Sequencing Circuitry The MAX1587A EV kit provides extra pads to support power sequencing. The directions below describe the implementation of this feature: 1) Cut the trace at R4, R5, R7, and R8. To create an RC time delay: 2) Install resistors and capacitors at locations R4, R5, R7, R8, C5, C2, C4, and C3. 3) Ensure that shunts are installed across pins 1 and 2 of jumpers JU2–JU5. Calculate component values using the equation below: RN = Table 4. Pulse-Skipping Mode Selection (JU7) SHUNT POSITION DESCRIPTION 1-2 VCC_CORE pulse-skipping mode disabled (forced PWM) 2-3* VCC_CORE pulse-skipping mode enabled *Default Configuration: JU7 (2-3) Using an Alternative SMBus Interface The MAX1587A EV kit provides pads and pullup resistor placeholders that allow an alternative SMBus/I2Ccompatible interface to be used. Connect the interface through the SCL, SDA, and GND pads. Install pullup resistors at positions R9 and R10, if required. −t V CN × ln 1 − TH VIN where: CN = 0.1µF VTH = 1.1V VIN = battery input voltage t = desired startup time Component Suppliers SUPPLIER PHONE FAX WEBSITE Central Semiconductor 631-435-1110 631-435-1824 Sumida USA 847-545-6700 847-545-6720 www.sumida.com TDK 847-803-6100 847-390-4405 www.component.tdk.com TOKO America 847-297-0070 847-699-1194 www.tokoam.com www.centralsemi.com Note: Please indicate that you are using the MAX1587A when contacting these component suppliers. 6 _______________________________________________________________________________________ MR SW1 VIN ON1 3 1 2 R11 1MΩ JU7 VIN JU6 3 1 2 C2 OPEN SRAD SLP SLPIN 17 JU2 VIN 2 JU5 1 3 JU4 R7 SHORT VIN 1 2 R8 SHORT 3 1 FB1 VIN ON45 22 R4 SHORT VIN 1 2 ON3 34 C3 OPEN ON2 21 37 LX1 C4 OPEN ON1 MR RSO POK 4 V1 L1 3.3µH R1 OPEN C5 OPEN 35 31 30 9 RAMP 12 PWM3 29 39 5 C16 1500pF C9 10µF R5 SHORT R12 1MΩ R13 1MΩ 3 1 2 VIN JU1 VI/O VI/O VIN JU3 RSO POK 3 1 2 VIN SLP C1 OPEN IN ON2 GND 16 ON3 VIN VI/O C13 10µF ON45 VIN GND 3 36 PG1 C10 4.7µF U1 CC1 40 C23 330pF 24 IN45 C28 4.7µF GND 6 V2 C24 270pF C6 OPEN R15 240kΩ 1% MAX1587A R14 240kΩ 1% REF 19 C17 0.1µF 38 PV1 VIN R3 SHORT R17 OPEN REF VCC_MEM CC2 8 14 LX2 7 FB2 VIN C25 330pF C8 OPEN BYP 20 R6 SHORT R18 OPEN C18 0.01µF CC3 32 C7 OPEN R16 240kΩ 1% L2 6.8µH R2 OPEN C14 10µF C27 10µF GND 18 13 PV2 VIN GND C26 10µF C22 1.0µF 3 11 10 25 23 26 28 33 27 15 D1 V7 SDA SCL V5 V4 PG3 PV3 FB3 LX3 PG2 BKBT 2 C11 4.7µF BKBT VIN C19 1.0µF L3 10µH SDA VI/O R10 OPEN C29 10µF SDA VCC_BATT SDA SCL SCL VCC_SRAM VCC_PLL R9 OPEN C21 1.0µF C20 1.0µF C12 4.7µF SCL VIN C15 10µF VI/O VCC_CORE J1-18 J1-19 J1-20 J1-16 J1-17 J1-14 J1-15 J1-10 J1-12 J1-8 J1-9 J1-13 J1-6 J1-7 J1-11 J1-4 J1-2 J1-5 J1 J1-3 J1-1 Evaluates: MAX1587A VCC_I/O MAX1587A Evaluation Kit/ MAX1587A Evaluation System Figure 3. MAX1587A EV Kit Schematic _______________________________________________________________________________________ 7 Evaluates: MAX1587A MAX1587A Evaluation Kit/ MAX1587A Evaluation System Figure 4. MAX1587A EV Kit Component Placement Guide—Component Side 8 _______________________________________________________________________________________ MAX1587A Evaluation Kit/ MAX1587A Evaluation System Evaluates: MAX1587A Figure 5. MAX1587A EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ 9 Evaluates: MAX1587A MAX1587A Evaluation Kit/ MAX1587A Evaluation System Figure 6. MAX1587A EV Kit PC Board Layout—Inner Layer 2 10 ______________________________________________________________________________________ MAX1587A Evaluation Kit/ MAX1587A Evaluation System Evaluates: MAX1587A Figure 7. MAX1587A EV Kit PC Board Layout—Inner Layer 3 ______________________________________________________________________________________ 11 Evaluates: MAX1587A MAX1587A Evaluation Kit/ MAX1587A Evaluation System Figure 8. MAX1587A EV Kit PC Board Layout—Solder Side 12 ______________________________________________________________________________________ MAX1587A Evaluation Kit/ MAX1587A Evaluation System Evaluates: MAX1587A Figure 9. MAX1587A EV Kit Component Placement Guide—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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.